From: "Mike Pagano" <mpagano@gentoo.org>
To: gentoo-commits@lists.gentoo.org
Subject: [gentoo-commits] proj/linux-patches:4.4 commit in: /
Date: Wed, 18 Nov 2020 19:21:57 +0000 (UTC) [thread overview]
Message-ID: <1605727303.61be1ef6110d3b0486f14abdc6c67243796525b0.mpagano@gentoo> (raw)
commit: 61be1ef6110d3b0486f14abdc6c67243796525b0
Author: Mike Pagano <mpagano <AT> gentoo <DOT> org>
AuthorDate: Wed Nov 18 19:21:43 2020 +0000
Commit: Mike Pagano <mpagano <AT> gentoo <DOT> org>
CommitDate: Wed Nov 18 19:21:43 2020 +0000
URL: https://gitweb.gentoo.org/proj/linux-patches.git/commit/?id=61be1ef6
Linux patch 4.4.244
Signed-off-by: Mike Pagano <mpagano <AT> gentoo.org>
0000_README | 4 +
1243_linux-4.4.244.patch | 3736 ++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 3740 insertions(+)
diff --git a/0000_README b/0000_README
index 9911219..ddfda26 100644
--- a/0000_README
+++ b/0000_README
@@ -1015,6 +1015,10 @@ Patch: 1242_linux-4.4.243.patch
From: http://www.kernel.org
Desc: Linux 4.4.243
+Patch: 1243_linux-4.4.244.patch
+From: http://www.kernel.org
+Desc: Linux 4.4.244
+
Patch: 1500_XATTR_USER_PREFIX.patch
From: https://bugs.gentoo.org/show_bug.cgi?id=470644
Desc: Support for namespace user.pax.* on tmpfs.
diff --git a/1243_linux-4.4.244.patch b/1243_linux-4.4.244.patch
new file mode 100644
index 0000000..1e1d270
--- /dev/null
+++ b/1243_linux-4.4.244.patch
@@ -0,0 +1,3736 @@
+diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
+index b19d872feb569..17747dcd0e779 100644
+--- a/Documentation/kernel-parameters.txt
++++ b/Documentation/kernel-parameters.txt
+@@ -4488,6 +4488,14 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
+ Disables the PV optimizations forcing the HVM guest to
+ run as generic HVM guest with no PV drivers.
+
++ xen.event_eoi_delay= [XEN]
++ How long to delay EOI handling in case of event
++ storms (jiffies). Default is 10.
++
++ xen.event_loop_timeout= [XEN]
++ After which time (jiffies) the event handling loop
++ should start to delay EOI handling. Default is 2.
++
+ xirc2ps_cs= [NET,PCMCIA]
+ Format:
+ <irq>,<irq_mask>,<io>,<full_duplex>,<do_sound>,<lockup_hack>[,<irq2>[,<irq3>[,<irq4>]]]
+diff --git a/Makefile b/Makefile
+index 99badda272d74..f8b9fd688781c 100644
+--- a/Makefile
++++ b/Makefile
+@@ -1,6 +1,6 @@
+ VERSION = 4
+ PATCHLEVEL = 4
+-SUBLEVEL = 243
++SUBLEVEL = 244
+ EXTRAVERSION =
+ NAME = Blurry Fish Butt
+
+diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c
+index 2d2631f9a519f..2c9a2992863b0 100644
+--- a/arch/x86/kernel/cpu/bugs.c
++++ b/arch/x86/kernel/cpu/bugs.c
+@@ -1223,6 +1223,14 @@ static int ssb_prctl_set(struct task_struct *task, unsigned long ctrl)
+ return 0;
+ }
+
++static bool is_spec_ib_user_controlled(void)
++{
++ return spectre_v2_user_ibpb == SPECTRE_V2_USER_PRCTL ||
++ spectre_v2_user_ibpb == SPECTRE_V2_USER_SECCOMP ||
++ spectre_v2_user_stibp == SPECTRE_V2_USER_PRCTL ||
++ spectre_v2_user_stibp == SPECTRE_V2_USER_SECCOMP;
++}
++
+ static int ib_prctl_set(struct task_struct *task, unsigned long ctrl)
+ {
+ switch (ctrl) {
+@@ -1230,17 +1238,26 @@ static int ib_prctl_set(struct task_struct *task, unsigned long ctrl)
+ if (spectre_v2_user_ibpb == SPECTRE_V2_USER_NONE &&
+ spectre_v2_user_stibp == SPECTRE_V2_USER_NONE)
+ return 0;
+- /*
+- * Indirect branch speculation is always disabled in strict
+- * mode. It can neither be enabled if it was force-disabled
+- * by a previous prctl call.
+
++ /*
++ * With strict mode for both IBPB and STIBP, the instruction
++ * code paths avoid checking this task flag and instead,
++ * unconditionally run the instruction. However, STIBP and IBPB
++ * are independent and either can be set to conditionally
++ * enabled regardless of the mode of the other.
++ *
++ * If either is set to conditional, allow the task flag to be
++ * updated, unless it was force-disabled by a previous prctl
++ * call. Currently, this is possible on an AMD CPU which has the
++ * feature X86_FEATURE_AMD_STIBP_ALWAYS_ON. In this case, if the
++ * kernel is booted with 'spectre_v2_user=seccomp', then
++ * spectre_v2_user_ibpb == SPECTRE_V2_USER_SECCOMP and
++ * spectre_v2_user_stibp == SPECTRE_V2_USER_STRICT_PREFERRED.
+ */
+- if (spectre_v2_user_ibpb == SPECTRE_V2_USER_STRICT ||
+- spectre_v2_user_stibp == SPECTRE_V2_USER_STRICT ||
+- spectre_v2_user_stibp == SPECTRE_V2_USER_STRICT_PREFERRED ||
++ if (!is_spec_ib_user_controlled() ||
+ task_spec_ib_force_disable(task))
+ return -EPERM;
++
+ task_clear_spec_ib_disable(task);
+ task_update_spec_tif(task);
+ break;
+@@ -1253,10 +1270,10 @@ static int ib_prctl_set(struct task_struct *task, unsigned long ctrl)
+ if (spectre_v2_user_ibpb == SPECTRE_V2_USER_NONE &&
+ spectre_v2_user_stibp == SPECTRE_V2_USER_NONE)
+ return -EPERM;
+- if (spectre_v2_user_ibpb == SPECTRE_V2_USER_STRICT ||
+- spectre_v2_user_stibp == SPECTRE_V2_USER_STRICT ||
+- spectre_v2_user_stibp == SPECTRE_V2_USER_STRICT_PREFERRED)
++
++ if (!is_spec_ib_user_controlled())
+ return 0;
++
+ task_set_spec_ib_disable(task);
+ if (ctrl == PR_SPEC_FORCE_DISABLE)
+ task_set_spec_ib_force_disable(task);
+@@ -1319,20 +1336,17 @@ static int ib_prctl_get(struct task_struct *task)
+ if (spectre_v2_user_ibpb == SPECTRE_V2_USER_NONE &&
+ spectre_v2_user_stibp == SPECTRE_V2_USER_NONE)
+ return PR_SPEC_ENABLE;
+- else if (spectre_v2_user_ibpb == SPECTRE_V2_USER_STRICT ||
+- spectre_v2_user_stibp == SPECTRE_V2_USER_STRICT ||
+- spectre_v2_user_stibp == SPECTRE_V2_USER_STRICT_PREFERRED)
+- return PR_SPEC_DISABLE;
+- else if (spectre_v2_user_ibpb == SPECTRE_V2_USER_PRCTL ||
+- spectre_v2_user_ibpb == SPECTRE_V2_USER_SECCOMP ||
+- spectre_v2_user_stibp == SPECTRE_V2_USER_PRCTL ||
+- spectre_v2_user_stibp == SPECTRE_V2_USER_SECCOMP) {
++ else if (is_spec_ib_user_controlled()) {
+ if (task_spec_ib_force_disable(task))
+ return PR_SPEC_PRCTL | PR_SPEC_FORCE_DISABLE;
+ if (task_spec_ib_disable(task))
+ return PR_SPEC_PRCTL | PR_SPEC_DISABLE;
+ return PR_SPEC_PRCTL | PR_SPEC_ENABLE;
+- } else
++ } else if (spectre_v2_user_ibpb == SPECTRE_V2_USER_STRICT ||
++ spectre_v2_user_stibp == SPECTRE_V2_USER_STRICT ||
++ spectre_v2_user_stibp == SPECTRE_V2_USER_STRICT_PREFERRED)
++ return PR_SPEC_DISABLE;
++ else
+ return PR_SPEC_NOT_AFFECTED;
+ }
+
+diff --git a/drivers/block/xen-blkback/blkback.c b/drivers/block/xen-blkback/blkback.c
+index a295ad6a1674f..8dbdd156e0d3e 100644
+--- a/drivers/block/xen-blkback/blkback.c
++++ b/drivers/block/xen-blkback/blkback.c
+@@ -173,7 +173,7 @@ static inline void shrink_free_pagepool(struct xen_blkif *blkif, int num)
+
+ #define vaddr(page) ((unsigned long)pfn_to_kaddr(page_to_pfn(page)))
+
+-static int do_block_io_op(struct xen_blkif *blkif);
++static int do_block_io_op(struct xen_blkif *blkif, unsigned int *eoi_flags);
+ static int dispatch_rw_block_io(struct xen_blkif *blkif,
+ struct blkif_request *req,
+ struct pending_req *pending_req);
+@@ -594,6 +594,8 @@ int xen_blkif_schedule(void *arg)
+ struct xen_vbd *vbd = &blkif->vbd;
+ unsigned long timeout;
+ int ret;
++ bool do_eoi;
++ unsigned int eoi_flags = XEN_EOI_FLAG_SPURIOUS;
+
+ while (!kthread_should_stop()) {
+ if (try_to_freeze())
+@@ -617,16 +619,23 @@ int xen_blkif_schedule(void *arg)
+ if (timeout == 0)
+ goto purge_gnt_list;
+
++ do_eoi = blkif->waiting_reqs;
++
+ blkif->waiting_reqs = 0;
+ smp_mb(); /* clear flag *before* checking for work */
+
+- ret = do_block_io_op(blkif);
++ ret = do_block_io_op(blkif, &eoi_flags);
+ if (ret > 0)
+ blkif->waiting_reqs = 1;
+ if (ret == -EACCES)
+ wait_event_interruptible(blkif->shutdown_wq,
+ kthread_should_stop());
+
++ if (do_eoi && !blkif->waiting_reqs) {
++ xen_irq_lateeoi(blkif->irq, eoi_flags);
++ eoi_flags |= XEN_EOI_FLAG_SPURIOUS;
++ }
++
+ purge_gnt_list:
+ if (blkif->vbd.feature_gnt_persistent &&
+ time_after(jiffies, blkif->next_lru)) {
+@@ -1094,7 +1103,7 @@ static void end_block_io_op(struct bio *bio)
+ * and transmute it to the block API to hand it over to the proper block disk.
+ */
+ static int
+-__do_block_io_op(struct xen_blkif *blkif)
++__do_block_io_op(struct xen_blkif *blkif, unsigned int *eoi_flags)
+ {
+ union blkif_back_rings *blk_rings = &blkif->blk_rings;
+ struct blkif_request req;
+@@ -1117,6 +1126,9 @@ __do_block_io_op(struct xen_blkif *blkif)
+ if (RING_REQUEST_CONS_OVERFLOW(&blk_rings->common, rc))
+ break;
+
++ /* We've seen a request, so clear spurious eoi flag. */
++ *eoi_flags &= ~XEN_EOI_FLAG_SPURIOUS;
++
+ if (kthread_should_stop()) {
+ more_to_do = 1;
+ break;
+@@ -1175,13 +1187,13 @@ done:
+ }
+
+ static int
+-do_block_io_op(struct xen_blkif *blkif)
++do_block_io_op(struct xen_blkif *blkif, unsigned int *eoi_flags)
+ {
+ union blkif_back_rings *blk_rings = &blkif->blk_rings;
+ int more_to_do;
+
+ do {
+- more_to_do = __do_block_io_op(blkif);
++ more_to_do = __do_block_io_op(blkif, eoi_flags);
+ if (more_to_do)
+ break;
+
+diff --git a/drivers/block/xen-blkback/xenbus.c b/drivers/block/xen-blkback/xenbus.c
+index 9233082013755..0ec257e69e95a 100644
+--- a/drivers/block/xen-blkback/xenbus.c
++++ b/drivers/block/xen-blkback/xenbus.c
+@@ -200,9 +200,8 @@ static int xen_blkif_map(struct xen_blkif *blkif, grant_ref_t *gref,
+ BUG();
+ }
+
+- err = bind_interdomain_evtchn_to_irqhandler(blkif->domid, evtchn,
+- xen_blkif_be_int, 0,
+- "blkif-backend", blkif);
++ err = bind_interdomain_evtchn_to_irqhandler_lateeoi(blkif->domid,
++ evtchn, xen_blkif_be_int, 0, "blkif-backend", blkif);
+ if (err < 0) {
+ xenbus_unmap_ring_vfree(blkif->be->dev, blkif->blk_ring);
+ blkif->blk_rings.common.sring = NULL;
+diff --git a/drivers/char/random.c b/drivers/char/random.c
+index 7bb1e423eb190..08d96d58f1f2f 100644
+--- a/drivers/char/random.c
++++ b/drivers/char/random.c
+@@ -678,7 +678,6 @@ retry:
+ r->initialized = 1;
+ r->entropy_total = 0;
+ if (r == &nonblocking_pool) {
+- prandom_reseed_late();
+ process_random_ready_list();
+ wake_up_all(&urandom_init_wait);
+ pr_notice("random: %s pool is initialized\n", r->name);
+@@ -923,7 +922,6 @@ void add_interrupt_randomness(int irq, int irq_flags)
+
+ fast_mix(fast_pool);
+ add_interrupt_bench(cycles);
+- this_cpu_add(net_rand_state.s1, fast_pool->pool[cycles & 3]);
+
+ if ((fast_pool->count < 64) &&
+ !time_after(now, fast_pool->last + HZ))
+diff --git a/drivers/gpu/drm/amd/amdgpu/cik_sdma.c b/drivers/gpu/drm/amd/amdgpu/cik_sdma.c
+index c568293cb6c1a..f1745c5cdf7b3 100644
+--- a/drivers/gpu/drm/amd/amdgpu/cik_sdma.c
++++ b/drivers/gpu/drm/amd/amdgpu/cik_sdma.c
+@@ -1118,22 +1118,19 @@ static int cik_sdma_soft_reset(void *handle)
+ {
+ u32 srbm_soft_reset = 0;
+ struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+- u32 tmp = RREG32(mmSRBM_STATUS2);
++ u32 tmp;
+
+- if (tmp & SRBM_STATUS2__SDMA_BUSY_MASK) {
+- /* sdma0 */
+- tmp = RREG32(mmSDMA0_F32_CNTL + SDMA0_REGISTER_OFFSET);
+- tmp |= SDMA0_F32_CNTL__HALT_MASK;
+- WREG32(mmSDMA0_F32_CNTL + SDMA0_REGISTER_OFFSET, tmp);
+- srbm_soft_reset |= SRBM_SOFT_RESET__SOFT_RESET_SDMA_MASK;
+- }
+- if (tmp & SRBM_STATUS2__SDMA1_BUSY_MASK) {
+- /* sdma1 */
+- tmp = RREG32(mmSDMA0_F32_CNTL + SDMA1_REGISTER_OFFSET);
+- tmp |= SDMA0_F32_CNTL__HALT_MASK;
+- WREG32(mmSDMA0_F32_CNTL + SDMA1_REGISTER_OFFSET, tmp);
+- srbm_soft_reset |= SRBM_SOFT_RESET__SOFT_RESET_SDMA1_MASK;
+- }
++ /* sdma0 */
++ tmp = RREG32(mmSDMA0_F32_CNTL + SDMA0_REGISTER_OFFSET);
++ tmp |= SDMA0_F32_CNTL__HALT_MASK;
++ WREG32(mmSDMA0_F32_CNTL + SDMA0_REGISTER_OFFSET, tmp);
++ srbm_soft_reset |= SRBM_SOFT_RESET__SOFT_RESET_SDMA_MASK;
++
++ /* sdma1 */
++ tmp = RREG32(mmSDMA0_F32_CNTL + SDMA1_REGISTER_OFFSET);
++ tmp |= SDMA0_F32_CNTL__HALT_MASK;
++ WREG32(mmSDMA0_F32_CNTL + SDMA1_REGISTER_OFFSET, tmp);
++ srbm_soft_reset |= SRBM_SOFT_RESET__SOFT_RESET_SDMA1_MASK;
+
+ if (srbm_soft_reset) {
+ cik_sdma_print_status((void *)adev);
+diff --git a/drivers/gpu/drm/gma500/psb_irq.c b/drivers/gpu/drm/gma500/psb_irq.c
+index 78eb109028091..076b6da44f461 100644
+--- a/drivers/gpu/drm/gma500/psb_irq.c
++++ b/drivers/gpu/drm/gma500/psb_irq.c
+@@ -350,6 +350,7 @@ int psb_irq_postinstall(struct drm_device *dev)
+ {
+ struct drm_psb_private *dev_priv = dev->dev_private;
+ unsigned long irqflags;
++ unsigned int i;
+
+ spin_lock_irqsave(&dev_priv->irqmask_lock, irqflags);
+
+@@ -362,20 +363,12 @@ int psb_irq_postinstall(struct drm_device *dev)
+ PSB_WVDC32(dev_priv->vdc_irq_mask, PSB_INT_ENABLE_R);
+ PSB_WVDC32(0xFFFFFFFF, PSB_HWSTAM);
+
+- if (dev->vblank[0].enabled)
+- psb_enable_pipestat(dev_priv, 0, PIPE_VBLANK_INTERRUPT_ENABLE);
+- else
+- psb_disable_pipestat(dev_priv, 0, PIPE_VBLANK_INTERRUPT_ENABLE);
+-
+- if (dev->vblank[1].enabled)
+- psb_enable_pipestat(dev_priv, 1, PIPE_VBLANK_INTERRUPT_ENABLE);
+- else
+- psb_disable_pipestat(dev_priv, 1, PIPE_VBLANK_INTERRUPT_ENABLE);
+-
+- if (dev->vblank[2].enabled)
+- psb_enable_pipestat(dev_priv, 2, PIPE_VBLANK_INTERRUPT_ENABLE);
+- else
+- psb_disable_pipestat(dev_priv, 2, PIPE_VBLANK_INTERRUPT_ENABLE);
++ for (i = 0; i < dev->num_crtcs; ++i) {
++ if (dev->vblank[i].enabled)
++ psb_enable_pipestat(dev_priv, i, PIPE_VBLANK_INTERRUPT_ENABLE);
++ else
++ psb_disable_pipestat(dev_priv, i, PIPE_VBLANK_INTERRUPT_ENABLE);
++ }
+
+ if (dev_priv->ops->hotplug_enable)
+ dev_priv->ops->hotplug_enable(dev, true);
+@@ -388,6 +381,7 @@ void psb_irq_uninstall(struct drm_device *dev)
+ {
+ struct drm_psb_private *dev_priv = dev->dev_private;
+ unsigned long irqflags;
++ unsigned int i;
+
+ spin_lock_irqsave(&dev_priv->irqmask_lock, irqflags);
+
+@@ -396,14 +390,10 @@ void psb_irq_uninstall(struct drm_device *dev)
+
+ PSB_WVDC32(0xFFFFFFFF, PSB_HWSTAM);
+
+- if (dev->vblank[0].enabled)
+- psb_disable_pipestat(dev_priv, 0, PIPE_VBLANK_INTERRUPT_ENABLE);
+-
+- if (dev->vblank[1].enabled)
+- psb_disable_pipestat(dev_priv, 1, PIPE_VBLANK_INTERRUPT_ENABLE);
+-
+- if (dev->vblank[2].enabled)
+- psb_disable_pipestat(dev_priv, 2, PIPE_VBLANK_INTERRUPT_ENABLE);
++ for (i = 0; i < dev->num_crtcs; ++i) {
++ if (dev->vblank[i].enabled)
++ psb_disable_pipestat(dev_priv, i, PIPE_VBLANK_INTERRUPT_ENABLE);
++ }
+
+ dev_priv->vdc_irq_mask &= _PSB_IRQ_SGX_FLAG |
+ _PSB_IRQ_MSVDX_FLAG |
+diff --git a/drivers/iommu/amd_iommu_types.h b/drivers/iommu/amd_iommu_types.h
+index 695d4e235438c..90832bf00538e 100644
+--- a/drivers/iommu/amd_iommu_types.h
++++ b/drivers/iommu/amd_iommu_types.h
+@@ -351,7 +351,11 @@ extern bool amd_iommu_np_cache;
+ /* Only true if all IOMMUs support device IOTLBs */
+ extern bool amd_iommu_iotlb_sup;
+
+-#define MAX_IRQS_PER_TABLE 256
++/*
++ * AMD IOMMU hardware only support 512 IRTEs despite
++ * the architectural limitation of 2048 entries.
++ */
++#define MAX_IRQS_PER_TABLE 512
+ #define IRQ_TABLE_ALIGNMENT 128
+
+ struct irq_remap_table {
+diff --git a/drivers/misc/mei/client.h b/drivers/misc/mei/client.h
+index 04e1aa39243f7..993d8f3e51d4e 100644
+--- a/drivers/misc/mei/client.h
++++ b/drivers/misc/mei/client.h
+@@ -156,11 +156,11 @@ static inline u8 mei_cl_me_id(const struct mei_cl *cl)
+ *
+ * @cl: host client
+ *
+- * Return: mtu
++ * Return: mtu or 0 if client is not connected
+ */
+ static inline size_t mei_cl_mtu(const struct mei_cl *cl)
+ {
+- return cl->me_cl->props.max_msg_length;
++ return cl->me_cl ? cl->me_cl->props.max_msg_length : 0;
+ }
+
+ /**
+diff --git a/drivers/net/can/dev.c b/drivers/net/can/dev.c
+index 9dd968ee792e0..9579dae54af29 100644
+--- a/drivers/net/can/dev.c
++++ b/drivers/net/can/dev.c
+@@ -439,9 +439,13 @@ struct sk_buff *__can_get_echo_skb(struct net_device *dev, unsigned int idx, u8
+ */
+ struct sk_buff *skb = priv->echo_skb[idx];
+ struct canfd_frame *cf = (struct canfd_frame *)skb->data;
+- u8 len = cf->len;
+
+- *len_ptr = len;
++ /* get the real payload length for netdev statistics */
++ if (cf->can_id & CAN_RTR_FLAG)
++ *len_ptr = 0;
++ else
++ *len_ptr = cf->len;
++
+ priv->echo_skb[idx] = NULL;
+
+ return skb;
+@@ -466,7 +470,11 @@ unsigned int can_get_echo_skb(struct net_device *dev, unsigned int idx)
+ if (!skb)
+ return 0;
+
+- netif_rx(skb);
++ skb_get(skb);
++ if (netif_rx(skb) == NET_RX_SUCCESS)
++ dev_consume_skb_any(skb);
++ else
++ dev_kfree_skb_any(skb);
+
+ return len;
+ }
+diff --git a/drivers/net/can/usb/peak_usb/pcan_usb_core.c b/drivers/net/can/usb/peak_usb/pcan_usb_core.c
+index 8c47cc8dc8965..22deddb2dbf5a 100644
+--- a/drivers/net/can/usb/peak_usb/pcan_usb_core.c
++++ b/drivers/net/can/usb/peak_usb/pcan_usb_core.c
+@@ -150,14 +150,55 @@ void peak_usb_get_ts_tv(struct peak_time_ref *time_ref, u32 ts,
+ /* protect from getting timeval before setting now */
+ if (time_ref->tv_host.tv_sec > 0) {
+ u64 delta_us;
++ s64 delta_ts = 0;
++
++ /* General case: dev_ts_1 < dev_ts_2 < ts, with:
++ *
++ * - dev_ts_1 = previous sync timestamp
++ * - dev_ts_2 = last sync timestamp
++ * - ts = event timestamp
++ * - ts_period = known sync period (theoretical)
++ * ~ dev_ts2 - dev_ts1
++ * *but*:
++ *
++ * - time counters wrap (see adapter->ts_used_bits)
++ * - sometimes, dev_ts_1 < ts < dev_ts2
++ *
++ * "normal" case (sync time counters increase):
++ * must take into account case when ts wraps (tsw)
++ *
++ * < ts_period > < >
++ * | | |
++ * ---+--------+----+-------0-+--+-->
++ * ts_dev_1 | ts_dev_2 |
++ * ts tsw
++ */
++ if (time_ref->ts_dev_1 < time_ref->ts_dev_2) {
++ /* case when event time (tsw) wraps */
++ if (ts < time_ref->ts_dev_1)
++ delta_ts = 1 << time_ref->adapter->ts_used_bits;
++
++ /* Otherwise, sync time counter (ts_dev_2) has wrapped:
++ * handle case when event time (tsn) hasn't.
++ *
++ * < ts_period > < >
++ * | | |
++ * ---+--------+--0-+---------+--+-->
++ * ts_dev_1 | ts_dev_2 |
++ * tsn ts
++ */
++ } else if (time_ref->ts_dev_1 < ts) {
++ delta_ts = -(1 << time_ref->adapter->ts_used_bits);
++ }
+
+- delta_us = ts - time_ref->ts_dev_2;
+- if (ts < time_ref->ts_dev_2)
+- delta_us &= (1 << time_ref->adapter->ts_used_bits) - 1;
++ /* add delay between last sync and event timestamps */
++ delta_ts += (signed int)(ts - time_ref->ts_dev_2);
+
+- delta_us += time_ref->ts_total;
++ /* add time from beginning to last sync */
++ delta_ts += time_ref->ts_total;
+
+- delta_us *= time_ref->adapter->us_per_ts_scale;
++ /* convert ticks number into microseconds */
++ delta_us = delta_ts * time_ref->adapter->us_per_ts_scale;
+ delta_us >>= time_ref->adapter->us_per_ts_shift;
+
+ *tv = time_ref->tv_host_0;
+diff --git a/drivers/net/can/usb/peak_usb/pcan_usb_fd.c b/drivers/net/can/usb/peak_usb/pcan_usb_fd.c
+index 1b75d5304a2c1..2e62cdc7ec7ab 100644
+--- a/drivers/net/can/usb/peak_usb/pcan_usb_fd.c
++++ b/drivers/net/can/usb/peak_usb/pcan_usb_fd.c
+@@ -475,12 +475,18 @@ static int pcan_usb_fd_decode_canmsg(struct pcan_usb_fd_if *usb_if,
+ struct pucan_msg *rx_msg)
+ {
+ struct pucan_rx_msg *rm = (struct pucan_rx_msg *)rx_msg;
+- struct peak_usb_device *dev = usb_if->dev[pucan_msg_get_channel(rm)];
+- struct net_device *netdev = dev->netdev;
++ struct peak_usb_device *dev;
++ struct net_device *netdev;
+ struct canfd_frame *cfd;
+ struct sk_buff *skb;
+ const u16 rx_msg_flags = le16_to_cpu(rm->flags);
+
++ if (pucan_msg_get_channel(rm) >= ARRAY_SIZE(usb_if->dev))
++ return -ENOMEM;
++
++ dev = usb_if->dev[pucan_msg_get_channel(rm)];
++ netdev = dev->netdev;
++
+ if (rx_msg_flags & PUCAN_MSG_EXT_DATA_LEN) {
+ /* CANFD frame case */
+ skb = alloc_canfd_skb(netdev, &cfd);
+@@ -527,15 +533,21 @@ static int pcan_usb_fd_decode_status(struct pcan_usb_fd_if *usb_if,
+ struct pucan_msg *rx_msg)
+ {
+ struct pucan_status_msg *sm = (struct pucan_status_msg *)rx_msg;
+- struct peak_usb_device *dev = usb_if->dev[pucan_stmsg_get_channel(sm)];
+- struct pcan_usb_fd_device *pdev =
+- container_of(dev, struct pcan_usb_fd_device, dev);
++ struct pcan_usb_fd_device *pdev;
+ enum can_state new_state = CAN_STATE_ERROR_ACTIVE;
+ enum can_state rx_state, tx_state;
+- struct net_device *netdev = dev->netdev;
++ struct peak_usb_device *dev;
++ struct net_device *netdev;
+ struct can_frame *cf;
+ struct sk_buff *skb;
+
++ if (pucan_stmsg_get_channel(sm) >= ARRAY_SIZE(usb_if->dev))
++ return -ENOMEM;
++
++ dev = usb_if->dev[pucan_stmsg_get_channel(sm)];
++ pdev = container_of(dev, struct pcan_usb_fd_device, dev);
++ netdev = dev->netdev;
++
+ /* nothing should be sent while in BUS_OFF state */
+ if (dev->can.state == CAN_STATE_BUS_OFF)
+ return 0;
+@@ -588,9 +600,14 @@ static int pcan_usb_fd_decode_error(struct pcan_usb_fd_if *usb_if,
+ struct pucan_msg *rx_msg)
+ {
+ struct pucan_error_msg *er = (struct pucan_error_msg *)rx_msg;
+- struct peak_usb_device *dev = usb_if->dev[pucan_ermsg_get_channel(er)];
+- struct pcan_usb_fd_device *pdev =
+- container_of(dev, struct pcan_usb_fd_device, dev);
++ struct pcan_usb_fd_device *pdev;
++ struct peak_usb_device *dev;
++
++ if (pucan_ermsg_get_channel(er) >= ARRAY_SIZE(usb_if->dev))
++ return -EINVAL;
++
++ dev = usb_if->dev[pucan_ermsg_get_channel(er)];
++ pdev = container_of(dev, struct pcan_usb_fd_device, dev);
+
+ /* keep a trace of tx and rx error counters for later use */
+ pdev->bec.txerr = er->tx_err_cnt;
+@@ -604,11 +621,17 @@ static int pcan_usb_fd_decode_overrun(struct pcan_usb_fd_if *usb_if,
+ struct pucan_msg *rx_msg)
+ {
+ struct pcan_ufd_ovr_msg *ov = (struct pcan_ufd_ovr_msg *)rx_msg;
+- struct peak_usb_device *dev = usb_if->dev[pufd_omsg_get_channel(ov)];
+- struct net_device *netdev = dev->netdev;
++ struct peak_usb_device *dev;
++ struct net_device *netdev;
+ struct can_frame *cf;
+ struct sk_buff *skb;
+
++ if (pufd_omsg_get_channel(ov) >= ARRAY_SIZE(usb_if->dev))
++ return -EINVAL;
++
++ dev = usb_if->dev[pufd_omsg_get_channel(ov)];
++ netdev = dev->netdev;
++
+ /* allocate an skb to store the error frame */
+ skb = alloc_can_err_skb(netdev, &cf);
+ if (!skb)
+@@ -726,6 +749,9 @@ static int pcan_usb_fd_encode_msg(struct peak_usb_device *dev,
+ u16 tx_msg_size, tx_msg_flags;
+ u8 can_dlc;
+
++ if (cfd->len > CANFD_MAX_DLEN)
++ return -EINVAL;
++
+ tx_msg_size = ALIGN(sizeof(struct pucan_tx_msg) + cfd->len, 4);
+ tx_msg->size = cpu_to_le16(tx_msg_size);
+ tx_msg->type = cpu_to_le16(PUCAN_MSG_CAN_TX);
+diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+index cdb263875efb3..b4b4d46da1734 100644
+--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
++++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+@@ -188,7 +188,7 @@ static inline bool i40e_vc_isvalid_vsi_id(struct i40e_vf *vf, u16 vsi_id)
+ * check for the valid queue id
+ **/
+ static inline bool i40e_vc_isvalid_queue_id(struct i40e_vf *vf, u16 vsi_id,
+- u8 qid)
++ u16 qid)
+ {
+ struct i40e_pf *pf = vf->pf;
+ struct i40e_vsi *vsi = i40e_find_vsi_from_id(pf, vsi_id);
+@@ -203,7 +203,7 @@ static inline bool i40e_vc_isvalid_queue_id(struct i40e_vf *vf, u16 vsi_id,
+ *
+ * check for the valid vector id
+ **/
+-static inline bool i40e_vc_isvalid_vector_id(struct i40e_vf *vf, u8 vector_id)
++static inline bool i40e_vc_isvalid_vector_id(struct i40e_vf *vf, u32 vector_id)
+ {
+ struct i40e_pf *pf = vf->pf;
+
+diff --git a/drivers/net/geneve.c b/drivers/net/geneve.c
+index ec13e2ae6d16e..ee38299f9c578 100644
+--- a/drivers/net/geneve.c
++++ b/drivers/net/geneve.c
+@@ -711,7 +711,8 @@ free_dst:
+ static struct rtable *geneve_get_v4_rt(struct sk_buff *skb,
+ struct net_device *dev,
+ struct flowi4 *fl4,
+- struct ip_tunnel_info *info)
++ struct ip_tunnel_info *info,
++ __be16 dport, __be16 sport)
+ {
+ struct geneve_dev *geneve = netdev_priv(dev);
+ struct rtable *rt = NULL;
+@@ -720,6 +721,8 @@ static struct rtable *geneve_get_v4_rt(struct sk_buff *skb,
+ memset(fl4, 0, sizeof(*fl4));
+ fl4->flowi4_mark = skb->mark;
+ fl4->flowi4_proto = IPPROTO_UDP;
++ fl4->fl4_dport = dport;
++ fl4->fl4_sport = sport;
+
+ if (info) {
+ fl4->daddr = info->key.u.ipv4.dst;
+@@ -754,7 +757,8 @@ static struct rtable *geneve_get_v4_rt(struct sk_buff *skb,
+ static struct dst_entry *geneve_get_v6_dst(struct sk_buff *skb,
+ struct net_device *dev,
+ struct flowi6 *fl6,
+- struct ip_tunnel_info *info)
++ struct ip_tunnel_info *info,
++ __be16 dport, __be16 sport)
+ {
+ struct geneve_dev *geneve = netdev_priv(dev);
+ struct geneve_sock *gs6 = geneve->sock6;
+@@ -764,6 +768,8 @@ static struct dst_entry *geneve_get_v6_dst(struct sk_buff *skb,
+ memset(fl6, 0, sizeof(*fl6));
+ fl6->flowi6_mark = skb->mark;
+ fl6->flowi6_proto = IPPROTO_UDP;
++ fl6->fl6_dport = dport;
++ fl6->fl6_sport = sport;
+
+ if (info) {
+ fl6->daddr = info->key.u.ipv6.dst;
+@@ -834,13 +840,14 @@ static netdev_tx_t geneve_xmit_skb(struct sk_buff *skb, struct net_device *dev,
+ goto tx_error;
+ }
+
+- rt = geneve_get_v4_rt(skb, dev, &fl4, info);
++ sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true);
++ rt = geneve_get_v4_rt(skb, dev, &fl4, info,
++ geneve->dst_port, sport);
+ if (IS_ERR(rt)) {
+ err = PTR_ERR(rt);
+ goto tx_error;
+ }
+
+- sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true);
+ skb_reset_mac_header(skb);
+
+ if (info) {
+@@ -916,13 +923,14 @@ static netdev_tx_t geneve6_xmit_skb(struct sk_buff *skb, struct net_device *dev,
+ }
+ }
+
+- dst = geneve_get_v6_dst(skb, dev, &fl6, info);
++ sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true);
++ dst = geneve_get_v6_dst(skb, dev, &fl6, info,
++ geneve->dst_port, sport);
+ if (IS_ERR(dst)) {
+ err = PTR_ERR(dst);
+ goto tx_error;
+ }
+
+- sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true);
+ skb_reset_mac_header(skb);
+
+ if (info) {
+@@ -1011,9 +1019,14 @@ static int geneve_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb)
+ struct dst_entry *dst;
+ struct flowi6 fl6;
+ #endif
++ __be16 sport;
+
+ if (ip_tunnel_info_af(info) == AF_INET) {
+- rt = geneve_get_v4_rt(skb, dev, &fl4, info);
++ sport = udp_flow_src_port(geneve->net, skb,
++ 1, USHRT_MAX, true);
++
++ rt = geneve_get_v4_rt(skb, dev, &fl4, info,
++ geneve->dst_port, sport);
+ if (IS_ERR(rt))
+ return PTR_ERR(rt);
+
+@@ -1021,7 +1034,11 @@ static int geneve_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb)
+ info->key.u.ipv4.src = fl4.saddr;
+ #if IS_ENABLED(CONFIG_IPV6)
+ } else if (ip_tunnel_info_af(info) == AF_INET6) {
+- dst = geneve_get_v6_dst(skb, dev, &fl6, info);
++ sport = udp_flow_src_port(geneve->net, skb,
++ 1, USHRT_MAX, true);
++
++ dst = geneve_get_v6_dst(skb, dev, &fl6, info,
++ geneve->dst_port, sport);
+ if (IS_ERR(dst))
+ return PTR_ERR(dst);
+
+@@ -1032,8 +1049,7 @@ static int geneve_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb)
+ return -EINVAL;
+ }
+
+- info->key.tp_src = udp_flow_src_port(geneve->net, skb,
+- 1, USHRT_MAX, true);
++ info->key.tp_src = sport;
+ info->key.tp_dst = geneve->dst_port;
+ return 0;
+ }
+diff --git a/drivers/net/wan/cosa.c b/drivers/net/wan/cosa.c
+index 848ea6a399f23..cbda69e58e084 100644
+--- a/drivers/net/wan/cosa.c
++++ b/drivers/net/wan/cosa.c
+@@ -903,6 +903,7 @@ static ssize_t cosa_write(struct file *file,
+ chan->tx_status = 1;
+ spin_unlock_irqrestore(&cosa->lock, flags);
+ up(&chan->wsem);
++ kfree(kbuf);
+ return -ERESTARTSYS;
+ }
+ }
+diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_txrx.c b/drivers/net/wireless/ath/ath9k/htc_drv_txrx.c
+index 91d199481a37c..64ff52eed9f53 100644
+--- a/drivers/net/wireless/ath/ath9k/htc_drv_txrx.c
++++ b/drivers/net/wireless/ath/ath9k/htc_drv_txrx.c
+@@ -972,7 +972,7 @@ static bool ath9k_rx_prepare(struct ath9k_htc_priv *priv,
+ struct ath_htc_rx_status *rxstatus;
+ struct ath_rx_status rx_stats;
+ bool decrypt_error = false;
+- __be16 rs_datalen;
++ u16 rs_datalen;
+ bool is_phyerr;
+
+ if (skb->len < HTC_RX_FRAME_HEADER_SIZE) {
+diff --git a/drivers/net/xen-netback/common.h b/drivers/net/xen-netback/common.h
+index 34173b5e886fb..53c2fa244c64b 100644
+--- a/drivers/net/xen-netback/common.h
++++ b/drivers/net/xen-netback/common.h
+@@ -137,6 +137,20 @@ struct xenvif_queue { /* Per-queue data for xenvif */
+ char name[QUEUE_NAME_SIZE]; /* DEVNAME-qN */
+ struct xenvif *vif; /* Parent VIF */
+
++ /*
++ * TX/RX common EOI handling.
++ * When feature-split-event-channels = 0, interrupt handler sets
++ * NETBK_COMMON_EOI, otherwise NETBK_RX_EOI and NETBK_TX_EOI are set
++ * by the RX and TX interrupt handlers.
++ * RX and TX handler threads will issue an EOI when either
++ * NETBK_COMMON_EOI or their specific bits (NETBK_RX_EOI or
++ * NETBK_TX_EOI) are set and they will reset those bits.
++ */
++ atomic_t eoi_pending;
++#define NETBK_RX_EOI 0x01
++#define NETBK_TX_EOI 0x02
++#define NETBK_COMMON_EOI 0x04
++
+ /* Use NAPI for guest TX */
+ struct napi_struct napi;
+ /* When feature-split-event-channels = 0, tx_irq = rx_irq. */
+@@ -317,6 +331,7 @@ void xenvif_kick_thread(struct xenvif_queue *queue);
+
+ int xenvif_dealloc_kthread(void *data);
+
++bool xenvif_have_rx_work(struct xenvif_queue *queue, bool test_kthread);
+ void xenvif_rx_queue_tail(struct xenvif_queue *queue, struct sk_buff *skb);
+
+ void xenvif_carrier_on(struct xenvif *vif);
+@@ -353,4 +368,28 @@ void xenvif_skb_zerocopy_complete(struct xenvif_queue *queue);
+ bool xenvif_mcast_match(struct xenvif *vif, const u8 *addr);
+ void xenvif_mcast_addr_list_free(struct xenvif *vif);
+
++#include <linux/atomic.h>
++
++static inline int xenvif_atomic_fetch_or(int i, atomic_t *v)
++{
++ int c, old;
++
++ c = v->counter;
++ while ((old = cmpxchg(&v->counter, c, c | i)) != c)
++ c = old;
++
++ return c;
++}
++
++static inline int xenvif_atomic_fetch_andnot(int i, atomic_t *v)
++{
++ int c, old;
++
++ c = v->counter;
++ while ((old = cmpxchg(&v->counter, c, c & ~i)) != c)
++ c = old;
++
++ return c;
++}
++
+ #endif /* __XEN_NETBACK__COMMON_H__ */
+diff --git a/drivers/net/xen-netback/interface.c b/drivers/net/xen-netback/interface.c
+index 2008c6a02b8a7..66260ea74d7dd 100644
+--- a/drivers/net/xen-netback/interface.c
++++ b/drivers/net/xen-netback/interface.c
+@@ -76,12 +76,28 @@ int xenvif_schedulable(struct xenvif *vif)
+ !vif->disabled;
+ }
+
++static bool xenvif_handle_tx_interrupt(struct xenvif_queue *queue)
++{
++ bool rc;
++
++ rc = RING_HAS_UNCONSUMED_REQUESTS(&queue->tx);
++ if (rc)
++ napi_schedule(&queue->napi);
++ return rc;
++}
++
+ static irqreturn_t xenvif_tx_interrupt(int irq, void *dev_id)
+ {
+ struct xenvif_queue *queue = dev_id;
++ int old;
+
+- if (RING_HAS_UNCONSUMED_REQUESTS(&queue->tx))
+- napi_schedule(&queue->napi);
++ old = xenvif_atomic_fetch_or(NETBK_TX_EOI, &queue->eoi_pending);
++ WARN(old & NETBK_TX_EOI, "Interrupt while EOI pending\n");
++
++ if (!xenvif_handle_tx_interrupt(queue)) {
++ atomic_andnot(NETBK_TX_EOI, &queue->eoi_pending);
++ xen_irq_lateeoi(irq, XEN_EOI_FLAG_SPURIOUS);
++ }
+
+ return IRQ_HANDLED;
+ }
+@@ -115,19 +131,46 @@ static int xenvif_poll(struct napi_struct *napi, int budget)
+ return work_done;
+ }
+
++static bool xenvif_handle_rx_interrupt(struct xenvif_queue *queue)
++{
++ bool rc;
++
++ rc = xenvif_have_rx_work(queue, false);
++ if (rc)
++ xenvif_kick_thread(queue);
++ return rc;
++}
++
+ static irqreturn_t xenvif_rx_interrupt(int irq, void *dev_id)
+ {
+ struct xenvif_queue *queue = dev_id;
++ int old;
+
+- xenvif_kick_thread(queue);
++ old = xenvif_atomic_fetch_or(NETBK_RX_EOI, &queue->eoi_pending);
++ WARN(old & NETBK_RX_EOI, "Interrupt while EOI pending\n");
++
++ if (!xenvif_handle_rx_interrupt(queue)) {
++ atomic_andnot(NETBK_RX_EOI, &queue->eoi_pending);
++ xen_irq_lateeoi(irq, XEN_EOI_FLAG_SPURIOUS);
++ }
+
+ return IRQ_HANDLED;
+ }
+
+ irqreturn_t xenvif_interrupt(int irq, void *dev_id)
+ {
+- xenvif_tx_interrupt(irq, dev_id);
+- xenvif_rx_interrupt(irq, dev_id);
++ struct xenvif_queue *queue = dev_id;
++ int old;
++
++ old = xenvif_atomic_fetch_or(NETBK_COMMON_EOI, &queue->eoi_pending);
++ WARN(old, "Interrupt while EOI pending\n");
++
++ /* Use bitwise or as we need to call both functions. */
++ if ((!xenvif_handle_tx_interrupt(queue) |
++ !xenvif_handle_rx_interrupt(queue))) {
++ atomic_andnot(NETBK_COMMON_EOI, &queue->eoi_pending);
++ xen_irq_lateeoi(irq, XEN_EOI_FLAG_SPURIOUS);
++ }
+
+ return IRQ_HANDLED;
+ }
+@@ -555,7 +598,7 @@ int xenvif_connect(struct xenvif_queue *queue, unsigned long tx_ring_ref,
+
+ if (tx_evtchn == rx_evtchn) {
+ /* feature-split-event-channels == 0 */
+- err = bind_interdomain_evtchn_to_irqhandler(
++ err = bind_interdomain_evtchn_to_irqhandler_lateeoi(
+ queue->vif->domid, tx_evtchn, xenvif_interrupt, 0,
+ queue->name, queue);
+ if (err < 0)
+@@ -566,7 +609,7 @@ int xenvif_connect(struct xenvif_queue *queue, unsigned long tx_ring_ref,
+ /* feature-split-event-channels == 1 */
+ snprintf(queue->tx_irq_name, sizeof(queue->tx_irq_name),
+ "%s-tx", queue->name);
+- err = bind_interdomain_evtchn_to_irqhandler(
++ err = bind_interdomain_evtchn_to_irqhandler_lateeoi(
+ queue->vif->domid, tx_evtchn, xenvif_tx_interrupt, 0,
+ queue->tx_irq_name, queue);
+ if (err < 0)
+@@ -576,7 +619,7 @@ int xenvif_connect(struct xenvif_queue *queue, unsigned long tx_ring_ref,
+
+ snprintf(queue->rx_irq_name, sizeof(queue->rx_irq_name),
+ "%s-rx", queue->name);
+- err = bind_interdomain_evtchn_to_irqhandler(
++ err = bind_interdomain_evtchn_to_irqhandler_lateeoi(
+ queue->vif->domid, rx_evtchn, xenvif_rx_interrupt, 0,
+ queue->rx_irq_name, queue);
+ if (err < 0)
+diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c
+index 65d37257e033b..ee7a800c16d54 100644
+--- a/drivers/net/xen-netback/netback.c
++++ b/drivers/net/xen-netback/netback.c
+@@ -670,6 +670,10 @@ void xenvif_napi_schedule_or_enable_events(struct xenvif_queue *queue)
+
+ if (more_to_do)
+ napi_schedule(&queue->napi);
++ else if (xenvif_atomic_fetch_andnot(NETBK_TX_EOI | NETBK_COMMON_EOI,
++ &queue->eoi_pending) &
++ (NETBK_TX_EOI | NETBK_COMMON_EOI))
++ xen_irq_lateeoi(queue->tx_irq, 0);
+ }
+
+ static void tx_add_credit(struct xenvif_queue *queue)
+@@ -2010,14 +2014,14 @@ static bool xenvif_rx_queue_ready(struct xenvif_queue *queue)
+ return queue->stalled && prod - cons >= 1;
+ }
+
+-static bool xenvif_have_rx_work(struct xenvif_queue *queue)
++bool xenvif_have_rx_work(struct xenvif_queue *queue, bool test_kthread)
+ {
+ return (!skb_queue_empty(&queue->rx_queue)
+ && xenvif_rx_ring_slots_available(queue))
+ || (queue->vif->stall_timeout &&
+ (xenvif_rx_queue_stalled(queue)
+ || xenvif_rx_queue_ready(queue)))
+- || kthread_should_stop()
++ || (test_kthread && kthread_should_stop())
+ || queue->vif->disabled;
+ }
+
+@@ -2048,15 +2052,20 @@ static void xenvif_wait_for_rx_work(struct xenvif_queue *queue)
+ {
+ DEFINE_WAIT(wait);
+
+- if (xenvif_have_rx_work(queue))
++ if (xenvif_have_rx_work(queue, true))
+ return;
+
+ for (;;) {
+ long ret;
+
+ prepare_to_wait(&queue->wq, &wait, TASK_INTERRUPTIBLE);
+- if (xenvif_have_rx_work(queue))
++ if (xenvif_have_rx_work(queue, true))
+ break;
++ if (xenvif_atomic_fetch_andnot(NETBK_RX_EOI | NETBK_COMMON_EOI,
++ &queue->eoi_pending) &
++ (NETBK_RX_EOI | NETBK_COMMON_EOI))
++ xen_irq_lateeoi(queue->rx_irq, 0);
++
+ ret = schedule_timeout(xenvif_rx_queue_timeout(queue));
+ if (!ret)
+ break;
+diff --git a/drivers/of/address.c b/drivers/of/address.c
+index b3bf8762f4e8c..77881432dd404 100644
+--- a/drivers/of/address.c
++++ b/drivers/of/address.c
+@@ -1014,11 +1014,13 @@ EXPORT_SYMBOL_GPL(of_dma_get_range);
+ */
+ bool of_dma_is_coherent(struct device_node *np)
+ {
+- struct device_node *node = of_node_get(np);
++ struct device_node *node;
+
+ if (IS_ENABLED(CONFIG_OF_DMA_DEFAULT_COHERENT))
+ return true;
+
++ node = of_node_get(np);
++
+ while (node) {
+ if (of_property_read_bool(node, "dma-coherent")) {
+ of_node_put(node);
+diff --git a/drivers/pinctrl/devicetree.c b/drivers/pinctrl/devicetree.c
+index fe04e748dfe4b..eb8c29f3e16ef 100644
+--- a/drivers/pinctrl/devicetree.c
++++ b/drivers/pinctrl/devicetree.c
+@@ -40,6 +40,13 @@ struct pinctrl_dt_map {
+ static void dt_free_map(struct pinctrl_dev *pctldev,
+ struct pinctrl_map *map, unsigned num_maps)
+ {
++ int i;
++
++ for (i = 0; i < num_maps; ++i) {
++ kfree_const(map[i].dev_name);
++ map[i].dev_name = NULL;
++ }
++
+ if (pctldev) {
+ const struct pinctrl_ops *ops = pctldev->desc->pctlops;
+ ops->dt_free_map(pctldev, map, num_maps);
+@@ -73,7 +80,13 @@ static int dt_remember_or_free_map(struct pinctrl *p, const char *statename,
+
+ /* Initialize common mapping table entry fields */
+ for (i = 0; i < num_maps; i++) {
+- map[i].dev_name = dev_name(p->dev);
++ const char *devname;
++
++ devname = kstrdup_const(dev_name(p->dev), GFP_KERNEL);
++ if (!devname)
++ goto err_free_map;
++
++ map[i].dev_name = devname;
+ map[i].name = statename;
+ if (pctldev)
+ map[i].ctrl_dev_name = dev_name(pctldev->dev);
+@@ -81,11 +94,8 @@ static int dt_remember_or_free_map(struct pinctrl *p, const char *statename,
+
+ /* Remember the converted mapping table entries */
+ dt_map = kzalloc(sizeof(*dt_map), GFP_KERNEL);
+- if (!dt_map) {
+- dev_err(p->dev, "failed to alloc struct pinctrl_dt_map\n");
+- dt_free_map(pctldev, map, num_maps);
+- return -ENOMEM;
+- }
++ if (!dt_map)
++ goto err_free_map;
+
+ dt_map->pctldev = pctldev;
+ dt_map->map = map;
+@@ -93,6 +103,10 @@ static int dt_remember_or_free_map(struct pinctrl *p, const char *statename,
+ list_add_tail(&dt_map->node, &p->dt_maps);
+
+ return pinctrl_register_map(map, num_maps, false);
++
++err_free_map:
++ dt_free_map(pctldev, map, num_maps);
++ return -ENOMEM;
+ }
+
+ struct pinctrl_dev *of_pinctrl_get(struct device_node *np)
+diff --git a/drivers/pinctrl/pinctrl-amd.c b/drivers/pinctrl/pinctrl-amd.c
+index 7340ff78839a3..a3b27856b9e97 100644
+--- a/drivers/pinctrl/pinctrl-amd.c
++++ b/drivers/pinctrl/pinctrl-amd.c
+@@ -144,7 +144,7 @@ static int amd_gpio_set_debounce(struct gpio_chip *gc, unsigned offset,
+ pin_reg |= BIT(DB_TMR_OUT_UNIT_OFF);
+ pin_reg &= ~BIT(DB_TMR_LARGE_OFF);
+ } else if (debounce < 250000) {
+- time = debounce / 15600;
++ time = debounce / 15625;
+ pin_reg |= time & DB_TMR_OUT_MASK;
+ pin_reg &= ~BIT(DB_TMR_OUT_UNIT_OFF);
+ pin_reg |= BIT(DB_TMR_LARGE_OFF);
+@@ -154,14 +154,14 @@ static int amd_gpio_set_debounce(struct gpio_chip *gc, unsigned offset,
+ pin_reg |= BIT(DB_TMR_OUT_UNIT_OFF);
+ pin_reg |= BIT(DB_TMR_LARGE_OFF);
+ } else {
+- pin_reg &= ~DB_CNTRl_MASK;
++ pin_reg &= ~(DB_CNTRl_MASK << DB_CNTRL_OFF);
+ ret = -EINVAL;
+ }
+ } else {
+ pin_reg &= ~BIT(DB_TMR_OUT_UNIT_OFF);
+ pin_reg &= ~BIT(DB_TMR_LARGE_OFF);
+ pin_reg &= ~DB_TMR_OUT_MASK;
+- pin_reg &= ~DB_CNTRl_MASK;
++ pin_reg &= ~(DB_CNTRl_MASK << DB_CNTRL_OFF);
+ }
+ writel(pin_reg, gpio_dev->base + offset * 4);
+ spin_unlock_irqrestore(&gpio_dev->lock, flags);
+diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
+index fb7e56fad41c8..a74a5c0eba6e4 100644
+--- a/drivers/usb/class/cdc-acm.c
++++ b/drivers/usb/class/cdc-acm.c
+@@ -1693,6 +1693,15 @@ static const struct usb_device_id acm_ids[] = {
+ { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
+ .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
+ },
++ { USB_DEVICE(0x045b, 0x023c), /* Renesas USB Download mode */
++ .driver_info = DISABLE_ECHO, /* Don't echo banner */
++ },
++ { USB_DEVICE(0x045b, 0x0248), /* Renesas USB Download mode */
++ .driver_info = DISABLE_ECHO, /* Don't echo banner */
++ },
++ { USB_DEVICE(0x045b, 0x024D), /* Renesas USB Download mode */
++ .driver_info = DISABLE_ECHO, /* Don't echo banner */
++ },
+ { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
+ .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
+ },
+diff --git a/drivers/usb/gadget/udc/goku_udc.c b/drivers/usb/gadget/udc/goku_udc.c
+index 1fdfec14a3ba1..5d4616061309e 100644
+--- a/drivers/usb/gadget/udc/goku_udc.c
++++ b/drivers/usb/gadget/udc/goku_udc.c
+@@ -1773,6 +1773,7 @@ static int goku_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+ goto err;
+ }
+
++ pci_set_drvdata(pdev, dev);
+ spin_lock_init(&dev->lock);
+ dev->pdev = pdev;
+ dev->gadget.ops = &goku_ops;
+@@ -1806,7 +1807,6 @@ static int goku_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+ }
+ dev->regs = (struct goku_udc_regs __iomem *) base;
+
+- pci_set_drvdata(pdev, dev);
+ INFO(dev, "%s\n", driver_desc);
+ INFO(dev, "version: " DRIVER_VERSION " %s\n", dmastr());
+ INFO(dev, "irq %d, pci mem %p\n", pdev->irq, base);
+diff --git a/drivers/xen/events/events_2l.c b/drivers/xen/events/events_2l.c
+index 7dd46312c1802..e902512fcfb50 100644
+--- a/drivers/xen/events/events_2l.c
++++ b/drivers/xen/events/events_2l.c
+@@ -90,6 +90,8 @@ static void evtchn_2l_unmask(unsigned port)
+
+ BUG_ON(!irqs_disabled());
+
++ smp_wmb(); /* All writes before unmask must be visible. */
++
+ if (unlikely((cpu != cpu_from_evtchn(port))))
+ do_hypercall = 1;
+ else {
+@@ -158,7 +160,7 @@ static inline xen_ulong_t active_evtchns(unsigned int cpu,
+ * a bitset of words which contain pending event bits. The second
+ * level is a bitset of pending events themselves.
+ */
+-static void evtchn_2l_handle_events(unsigned cpu)
++static void evtchn_2l_handle_events(unsigned cpu, struct evtchn_loop_ctrl *ctrl)
+ {
+ int irq;
+ xen_ulong_t pending_words;
+@@ -239,10 +241,7 @@ static void evtchn_2l_handle_events(unsigned cpu)
+
+ /* Process port. */
+ port = (word_idx * BITS_PER_EVTCHN_WORD) + bit_idx;
+- irq = get_evtchn_to_irq(port);
+-
+- if (irq != -1)
+- generic_handle_irq(irq);
++ handle_irq_for_port(port, ctrl);
+
+ bit_idx = (bit_idx + 1) % BITS_PER_EVTCHN_WORD;
+
+diff --git a/drivers/xen/events/events_base.c b/drivers/xen/events/events_base.c
+index 9a126732d5d9c..ec4074c66d9db 100644
+--- a/drivers/xen/events/events_base.c
++++ b/drivers/xen/events/events_base.c
+@@ -32,6 +32,10 @@
+ #include <linux/slab.h>
+ #include <linux/irqnr.h>
+ #include <linux/pci.h>
++#include <linux/spinlock.h>
++#include <linux/cpu.h>
++#include <linux/atomic.h>
++#include <linux/ktime.h>
+
+ #ifdef CONFIG_X86
+ #include <asm/desc.h>
+@@ -62,6 +66,15 @@
+
+ #include "events_internal.h"
+
++#undef MODULE_PARAM_PREFIX
++#define MODULE_PARAM_PREFIX "xen."
++
++static uint __read_mostly event_loop_timeout = 2;
++module_param(event_loop_timeout, uint, 0644);
++
++static uint __read_mostly event_eoi_delay = 10;
++module_param(event_eoi_delay, uint, 0644);
++
+ const struct evtchn_ops *evtchn_ops;
+
+ /*
+@@ -70,6 +83,24 @@ const struct evtchn_ops *evtchn_ops;
+ */
+ static DEFINE_MUTEX(irq_mapping_update_lock);
+
++/*
++ * Lock protecting event handling loop against removing event channels.
++ * Adding of event channels is no issue as the associated IRQ becomes active
++ * only after everything is setup (before request_[threaded_]irq() the handler
++ * can't be entered for an event, as the event channel will be unmasked only
++ * then).
++ */
++static DEFINE_RWLOCK(evtchn_rwlock);
++
++/*
++ * Lock hierarchy:
++ *
++ * irq_mapping_update_lock
++ * evtchn_rwlock
++ * IRQ-desc lock
++ * percpu eoi_list_lock
++ */
++
+ static LIST_HEAD(xen_irq_list_head);
+
+ /* IRQ <-> VIRQ mapping. */
+@@ -94,17 +125,20 @@ static bool (*pirq_needs_eoi)(unsigned irq);
+ static struct irq_info *legacy_info_ptrs[NR_IRQS_LEGACY];
+
+ static struct irq_chip xen_dynamic_chip;
++static struct irq_chip xen_lateeoi_chip;
+ static struct irq_chip xen_percpu_chip;
+ static struct irq_chip xen_pirq_chip;
+ static void enable_dynirq(struct irq_data *data);
+ static void disable_dynirq(struct irq_data *data);
+
++static DEFINE_PER_CPU(unsigned int, irq_epoch);
++
+ static void clear_evtchn_to_irq_row(unsigned row)
+ {
+ unsigned col;
+
+ for (col = 0; col < EVTCHN_PER_ROW; col++)
+- evtchn_to_irq[row][col] = -1;
++ WRITE_ONCE(evtchn_to_irq[row][col], -1);
+ }
+
+ static void clear_evtchn_to_irq_all(void)
+@@ -141,7 +175,7 @@ static int set_evtchn_to_irq(unsigned evtchn, unsigned irq)
+ clear_evtchn_to_irq_row(row);
+ }
+
+- evtchn_to_irq[row][col] = irq;
++ WRITE_ONCE(evtchn_to_irq[row][col], irq);
+ return 0;
+ }
+
+@@ -151,7 +185,7 @@ int get_evtchn_to_irq(unsigned evtchn)
+ return -1;
+ if (evtchn_to_irq[EVTCHN_ROW(evtchn)] == NULL)
+ return -1;
+- return evtchn_to_irq[EVTCHN_ROW(evtchn)][EVTCHN_COL(evtchn)];
++ return READ_ONCE(evtchn_to_irq[EVTCHN_ROW(evtchn)][EVTCHN_COL(evtchn)]);
+ }
+
+ /* Get info for IRQ */
+@@ -260,10 +294,14 @@ static void xen_irq_info_cleanup(struct irq_info *info)
+ */
+ unsigned int evtchn_from_irq(unsigned irq)
+ {
+- if (unlikely(WARN(irq >= nr_irqs, "Invalid irq %d!\n", irq)))
++ const struct irq_info *info = NULL;
++
++ if (likely(irq < nr_irqs))
++ info = info_for_irq(irq);
++ if (!info)
+ return 0;
+
+- return info_for_irq(irq)->evtchn;
++ return info->evtchn;
+ }
+
+ unsigned irq_from_evtchn(unsigned int evtchn)
+@@ -382,9 +420,157 @@ void notify_remote_via_irq(int irq)
+ }
+ EXPORT_SYMBOL_GPL(notify_remote_via_irq);
+
++struct lateeoi_work {
++ struct delayed_work delayed;
++ spinlock_t eoi_list_lock;
++ struct list_head eoi_list;
++};
++
++static DEFINE_PER_CPU(struct lateeoi_work, lateeoi);
++
++static void lateeoi_list_del(struct irq_info *info)
++{
++ struct lateeoi_work *eoi = &per_cpu(lateeoi, info->eoi_cpu);
++ unsigned long flags;
++
++ spin_lock_irqsave(&eoi->eoi_list_lock, flags);
++ list_del_init(&info->eoi_list);
++ spin_unlock_irqrestore(&eoi->eoi_list_lock, flags);
++}
++
++static void lateeoi_list_add(struct irq_info *info)
++{
++ struct lateeoi_work *eoi = &per_cpu(lateeoi, info->eoi_cpu);
++ struct irq_info *elem;
++ u64 now = get_jiffies_64();
++ unsigned long delay;
++ unsigned long flags;
++
++ if (now < info->eoi_time)
++ delay = info->eoi_time - now;
++ else
++ delay = 1;
++
++ spin_lock_irqsave(&eoi->eoi_list_lock, flags);
++
++ if (list_empty(&eoi->eoi_list)) {
++ list_add(&info->eoi_list, &eoi->eoi_list);
++ mod_delayed_work_on(info->eoi_cpu, system_wq,
++ &eoi->delayed, delay);
++ } else {
++ list_for_each_entry_reverse(elem, &eoi->eoi_list, eoi_list) {
++ if (elem->eoi_time <= info->eoi_time)
++ break;
++ }
++ list_add(&info->eoi_list, &elem->eoi_list);
++ }
++
++ spin_unlock_irqrestore(&eoi->eoi_list_lock, flags);
++}
++
++static void xen_irq_lateeoi_locked(struct irq_info *info, bool spurious)
++{
++ evtchn_port_t evtchn;
++ unsigned int cpu;
++ unsigned int delay = 0;
++
++ evtchn = info->evtchn;
++ if (!VALID_EVTCHN(evtchn) || !list_empty(&info->eoi_list))
++ return;
++
++ if (spurious) {
++ if ((1 << info->spurious_cnt) < (HZ << 2))
++ info->spurious_cnt++;
++ if (info->spurious_cnt > 1) {
++ delay = 1 << (info->spurious_cnt - 2);
++ if (delay > HZ)
++ delay = HZ;
++ if (!info->eoi_time)
++ info->eoi_cpu = smp_processor_id();
++ info->eoi_time = get_jiffies_64() + delay;
++ }
++ } else {
++ info->spurious_cnt = 0;
++ }
++
++ cpu = info->eoi_cpu;
++ if (info->eoi_time &&
++ (info->irq_epoch == per_cpu(irq_epoch, cpu) || delay)) {
++ lateeoi_list_add(info);
++ return;
++ }
++
++ info->eoi_time = 0;
++ unmask_evtchn(evtchn);
++}
++
++static void xen_irq_lateeoi_worker(struct work_struct *work)
++{
++ struct lateeoi_work *eoi;
++ struct irq_info *info;
++ u64 now = get_jiffies_64();
++ unsigned long flags;
++
++ eoi = container_of(to_delayed_work(work), struct lateeoi_work, delayed);
++
++ read_lock_irqsave(&evtchn_rwlock, flags);
++
++ while (true) {
++ spin_lock(&eoi->eoi_list_lock);
++
++ info = list_first_entry_or_null(&eoi->eoi_list, struct irq_info,
++ eoi_list);
++
++ if (info == NULL || now < info->eoi_time) {
++ spin_unlock(&eoi->eoi_list_lock);
++ break;
++ }
++
++ list_del_init(&info->eoi_list);
++
++ spin_unlock(&eoi->eoi_list_lock);
++
++ info->eoi_time = 0;
++
++ xen_irq_lateeoi_locked(info, false);
++ }
++
++ if (info)
++ mod_delayed_work_on(info->eoi_cpu, system_wq,
++ &eoi->delayed, info->eoi_time - now);
++
++ read_unlock_irqrestore(&evtchn_rwlock, flags);
++}
++
++static void xen_cpu_init_eoi(unsigned int cpu)
++{
++ struct lateeoi_work *eoi = &per_cpu(lateeoi, cpu);
++
++ INIT_DELAYED_WORK(&eoi->delayed, xen_irq_lateeoi_worker);
++ spin_lock_init(&eoi->eoi_list_lock);
++ INIT_LIST_HEAD(&eoi->eoi_list);
++}
++
++void xen_irq_lateeoi(unsigned int irq, unsigned int eoi_flags)
++{
++ struct irq_info *info;
++ unsigned long flags;
++
++ read_lock_irqsave(&evtchn_rwlock, flags);
++
++ info = info_for_irq(irq);
++
++ if (info)
++ xen_irq_lateeoi_locked(info, eoi_flags & XEN_EOI_FLAG_SPURIOUS);
++
++ read_unlock_irqrestore(&evtchn_rwlock, flags);
++}
++EXPORT_SYMBOL_GPL(xen_irq_lateeoi);
++
+ static void xen_irq_init(unsigned irq)
+ {
+ struct irq_info *info;
++
+ #ifdef CONFIG_SMP
+ /* By default all event channels notify CPU#0. */
+ cpumask_copy(irq_get_affinity_mask(irq), cpumask_of(0));
+@@ -399,6 +585,7 @@ static void xen_irq_init(unsigned irq)
+
+ set_info_for_irq(irq, info);
+
++ INIT_LIST_HEAD(&info->eoi_list);
+ list_add_tail(&info->list, &xen_irq_list_head);
+ }
+
+@@ -447,16 +634,24 @@ static int __must_check xen_allocate_irq_gsi(unsigned gsi)
+ static void xen_free_irq(unsigned irq)
+ {
+ struct irq_info *info = info_for_irq(irq);
++ unsigned long flags;
+
+ if (WARN_ON(!info))
+ return;
+
++ write_lock_irqsave(&evtchn_rwlock, flags);
++
++ if (!list_empty(&info->eoi_list))
++ lateeoi_list_del(info);
++
+ list_del(&info->list);
+
+ set_info_for_irq(irq, NULL);
+
+ WARN_ON(info->refcnt > 0);
+
++ write_unlock_irqrestore(&evtchn_rwlock, flags);
++
+ kfree(info);
+
+ /* Legacy IRQ descriptors are managed by the arch. */
+@@ -848,7 +1043,7 @@ int xen_pirq_from_irq(unsigned irq)
+ }
+ EXPORT_SYMBOL_GPL(xen_pirq_from_irq);
+
+-int bind_evtchn_to_irq(unsigned int evtchn)
++static int bind_evtchn_to_irq_chip(evtchn_port_t evtchn, struct irq_chip *chip)
+ {
+ int irq;
+ int ret;
+@@ -865,7 +1060,7 @@ int bind_evtchn_to_irq(unsigned int evtchn)
+ if (irq < 0)
+ goto out;
+
+- irq_set_chip_and_handler_name(irq, &xen_dynamic_chip,
++ irq_set_chip_and_handler_name(irq, chip,
+ handle_edge_irq, "event");
+
+ ret = xen_irq_info_evtchn_setup(irq, evtchn);
+@@ -886,8 +1081,19 @@ out:
+
+ return irq;
+ }
++
++int bind_evtchn_to_irq(evtchn_port_t evtchn)
++{
++ return bind_evtchn_to_irq_chip(evtchn, &xen_dynamic_chip);
++}
+ EXPORT_SYMBOL_GPL(bind_evtchn_to_irq);
+
++int bind_evtchn_to_irq_lateeoi(evtchn_port_t evtchn)
++{
++ return bind_evtchn_to_irq_chip(evtchn, &xen_lateeoi_chip);
++}
++EXPORT_SYMBOL_GPL(bind_evtchn_to_irq_lateeoi);
++
+ static int bind_ipi_to_irq(unsigned int ipi, unsigned int cpu)
+ {
+ struct evtchn_bind_ipi bind_ipi;
+@@ -929,8 +1135,9 @@ static int bind_ipi_to_irq(unsigned int ipi, unsigned int cpu)
+ return irq;
+ }
+
+-int bind_interdomain_evtchn_to_irq(unsigned int remote_domain,
+- unsigned int remote_port)
++static int bind_interdomain_evtchn_to_irq_chip(unsigned int remote_domain,
++ evtchn_port_t remote_port,
++ struct irq_chip *chip)
+ {
+ struct evtchn_bind_interdomain bind_interdomain;
+ int err;
+@@ -941,10 +1148,26 @@ int bind_interdomain_evtchn_to_irq(unsigned int remote_domain,
+ err = HYPERVISOR_event_channel_op(EVTCHNOP_bind_interdomain,
+ &bind_interdomain);
+
+- return err ? : bind_evtchn_to_irq(bind_interdomain.local_port);
++ return err ? : bind_evtchn_to_irq_chip(bind_interdomain.local_port,
++ chip);
++}
++
++int bind_interdomain_evtchn_to_irq(unsigned int remote_domain,
++ evtchn_port_t remote_port)
++{
++ return bind_interdomain_evtchn_to_irq_chip(remote_domain, remote_port,
++ &xen_dynamic_chip);
+ }
+ EXPORT_SYMBOL_GPL(bind_interdomain_evtchn_to_irq);
+
++int bind_interdomain_evtchn_to_irq_lateeoi(unsigned int remote_domain,
++ evtchn_port_t remote_port)
++{
++ return bind_interdomain_evtchn_to_irq_chip(remote_domain, remote_port,
++ &xen_lateeoi_chip);
++}
++EXPORT_SYMBOL_GPL(bind_interdomain_evtchn_to_irq_lateeoi);
++
+ static int find_virq(unsigned int virq, unsigned int cpu)
+ {
+ struct evtchn_status status;
+@@ -1040,14 +1263,15 @@ static void unbind_from_irq(unsigned int irq)
+ mutex_unlock(&irq_mapping_update_lock);
+ }
+
+-int bind_evtchn_to_irqhandler(unsigned int evtchn,
+- irq_handler_t handler,
+- unsigned long irqflags,
+- const char *devname, void *dev_id)
++static int bind_evtchn_to_irqhandler_chip(evtchn_port_t evtchn,
++ irq_handler_t handler,
++ unsigned long irqflags,
++ const char *devname, void *dev_id,
++ struct irq_chip *chip)
+ {
+ int irq, retval;
+
+- irq = bind_evtchn_to_irq(evtchn);
++ irq = bind_evtchn_to_irq_chip(evtchn, chip);
+ if (irq < 0)
+ return irq;
+ retval = request_irq(irq, handler, irqflags, devname, dev_id);
+@@ -1058,18 +1282,38 @@ int bind_evtchn_to_irqhandler(unsigned int evtchn,
+
+ return irq;
+ }
++
++int bind_evtchn_to_irqhandler(evtchn_port_t evtchn,
++ irq_handler_t handler,
++ unsigned long irqflags,
++ const char *devname, void *dev_id)
++{
++ return bind_evtchn_to_irqhandler_chip(evtchn, handler, irqflags,
++ devname, dev_id,
++ &xen_dynamic_chip);
++}
+ EXPORT_SYMBOL_GPL(bind_evtchn_to_irqhandler);
+
+-int bind_interdomain_evtchn_to_irqhandler(unsigned int remote_domain,
+- unsigned int remote_port,
+- irq_handler_t handler,
+- unsigned long irqflags,
+- const char *devname,
+- void *dev_id)
++int bind_evtchn_to_irqhandler_lateeoi(evtchn_port_t evtchn,
++ irq_handler_t handler,
++ unsigned long irqflags,
++ const char *devname, void *dev_id)
++{
++ return bind_evtchn_to_irqhandler_chip(evtchn, handler, irqflags,
++ devname, dev_id,
++ &xen_lateeoi_chip);
++}
++EXPORT_SYMBOL_GPL(bind_evtchn_to_irqhandler_lateeoi);
++
++static int bind_interdomain_evtchn_to_irqhandler_chip(
++ unsigned int remote_domain, evtchn_port_t remote_port,
++ irq_handler_t handler, unsigned long irqflags,
++ const char *devname, void *dev_id, struct irq_chip *chip)
+ {
+ int irq, retval;
+
+- irq = bind_interdomain_evtchn_to_irq(remote_domain, remote_port);
++ irq = bind_interdomain_evtchn_to_irq_chip(remote_domain, remote_port,
++ chip);
+ if (irq < 0)
+ return irq;
+
+@@ -1081,8 +1325,33 @@ int bind_interdomain_evtchn_to_irqhandler(unsigned int remote_domain,
+
+ return irq;
+ }
++
++int bind_interdomain_evtchn_to_irqhandler(unsigned int remote_domain,
++ evtchn_port_t remote_port,
++ irq_handler_t handler,
++ unsigned long irqflags,
++ const char *devname,
++ void *dev_id)
++{
++ return bind_interdomain_evtchn_to_irqhandler_chip(remote_domain,
++ remote_port, handler, irqflags, devname,
++ dev_id, &xen_dynamic_chip);
++}
+ EXPORT_SYMBOL_GPL(bind_interdomain_evtchn_to_irqhandler);
+
++int bind_interdomain_evtchn_to_irqhandler_lateeoi(unsigned int remote_domain,
++ evtchn_port_t remote_port,
++ irq_handler_t handler,
++ unsigned long irqflags,
++ const char *devname,
++ void *dev_id)
++{
++ return bind_interdomain_evtchn_to_irqhandler_chip(remote_domain,
++ remote_port, handler, irqflags, devname,
++ dev_id, &xen_lateeoi_chip);
++}
++EXPORT_SYMBOL_GPL(bind_interdomain_evtchn_to_irqhandler_lateeoi);
++
+ int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu,
+ irq_handler_t handler,
+ unsigned long irqflags, const char *devname, void *dev_id)
+@@ -1195,7 +1464,7 @@ int evtchn_get(unsigned int evtchn)
+ goto done;
+
+ err = -EINVAL;
+- if (info->refcnt <= 0)
++ if (info->refcnt <= 0 || info->refcnt == SHRT_MAX)
+ goto done;
+
+ info->refcnt++;
+@@ -1233,6 +1502,54 @@ void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector)
+ notify_remote_via_irq(irq);
+ }
+
++struct evtchn_loop_ctrl {
++ ktime_t timeout;
++ unsigned count;
++ bool defer_eoi;
++};
++
++void handle_irq_for_port(evtchn_port_t port, struct evtchn_loop_ctrl *ctrl)
++{
++ int irq;
++ struct irq_info *info;
++
++ irq = get_evtchn_to_irq(port);
++ if (irq == -1)
++ return;
++
++ /*
++ * Check for timeout every 256 events.
++ * We are setting the timeout value only after the first 256
++ * events in order to not hurt the common case of few loop
++ * iterations. The 256 is basically an arbitrary value.
++ *
++ * In case we are hitting the timeout we need to defer all further
++ * EOIs in order to ensure to leave the event handling loop rather
++ * sooner than later.
++ */
++ if (!ctrl->defer_eoi && !(++ctrl->count & 0xff)) {
++ ktime_t kt = ktime_get();
++
++ if (!ctrl->timeout.tv64) {
++ kt = ktime_add_ms(kt,
++ jiffies_to_msecs(event_loop_timeout));
++ ctrl->timeout = kt;
++ } else if (kt.tv64 > ctrl->timeout.tv64) {
++ ctrl->defer_eoi = true;
++ }
++ }
++
++ info = info_for_irq(irq);
++
++ if (ctrl->defer_eoi) {
++ info->eoi_cpu = smp_processor_id();
++ info->irq_epoch = __this_cpu_read(irq_epoch);
++ info->eoi_time = get_jiffies_64() + event_eoi_delay;
++ }
++
++ generic_handle_irq(irq);
++}
++
+ static DEFINE_PER_CPU(unsigned, xed_nesting_count);
+
+ static void __xen_evtchn_do_upcall(void)
+@@ -1240,6 +1557,9 @@ static void __xen_evtchn_do_upcall(void)
+ struct vcpu_info *vcpu_info = __this_cpu_read(xen_vcpu);
+ int cpu = get_cpu();
+ unsigned count;
++ struct evtchn_loop_ctrl ctrl = { 0 };
++
++ read_lock(&evtchn_rwlock);
+
+ do {
+ vcpu_info->evtchn_upcall_pending = 0;
+@@ -1247,7 +1567,7 @@ static void __xen_evtchn_do_upcall(void)
+ if (__this_cpu_inc_return(xed_nesting_count) - 1)
+ goto out;
+
+- xen_evtchn_handle_events(cpu);
++ xen_evtchn_handle_events(cpu, &ctrl);
+
+ BUG_ON(!irqs_disabled());
+
+@@ -1256,6 +1576,14 @@ static void __xen_evtchn_do_upcall(void)
+ } while (count != 1 || vcpu_info->evtchn_upcall_pending);
+
+ out:
++ read_unlock(&evtchn_rwlock);
++
++ /*
++ * Increment irq_epoch only now to defer EOIs only for
++ * xen_irq_lateeoi() invocations occurring from inside the loop
++ * above.
++ */
++ __this_cpu_inc(irq_epoch);
+
+ put_cpu();
+ }
+@@ -1612,6 +1940,21 @@ static struct irq_chip xen_dynamic_chip __read_mostly = {
+ .irq_retrigger = retrigger_dynirq,
+ };
+
++static struct irq_chip xen_lateeoi_chip __read_mostly = {
++ /* The chip name needs to contain "xen-dyn" for irqbalance to work. */
++ .name = "xen-dyn-lateeoi",
++
++ .irq_disable = disable_dynirq,
++ .irq_mask = disable_dynirq,
++ .irq_unmask = enable_dynirq,
++
++ .irq_ack = mask_ack_dynirq,
++ .irq_mask_ack = mask_ack_dynirq,
++
++ .irq_set_affinity = set_affinity_irq,
++ .irq_retrigger = retrigger_dynirq,
++};
++
+ static struct irq_chip xen_pirq_chip __read_mostly = {
+ .name = "xen-pirq",
+
+@@ -1679,12 +2022,55 @@ void xen_callback_vector(void)
+ void xen_callback_vector(void) {}
+ #endif
+
+-#undef MODULE_PARAM_PREFIX
+-#define MODULE_PARAM_PREFIX "xen."
+-
+ static bool fifo_events = true;
+ module_param(fifo_events, bool, 0);
+
++static int xen_evtchn_cpu_prepare(unsigned int cpu)
++{
++ int ret = 0;
++
++ xen_cpu_init_eoi(cpu);
++
++ if (evtchn_ops->percpu_init)
++ ret = evtchn_ops->percpu_init(cpu);
++
++ return ret;
++}
++
++static int xen_evtchn_cpu_dead(unsigned int cpu)
++{
++ int ret = 0;
++
++ if (evtchn_ops->percpu_deinit)
++ ret = evtchn_ops->percpu_deinit(cpu);
++
++ return ret;
++}
++
++static int evtchn_cpu_notification(struct notifier_block *self,
++ unsigned long action, void *hcpu)
++{
++ int cpu = (long)hcpu;
++ int ret = 0;
++
++ switch (action) {
++ case CPU_UP_PREPARE:
++ ret = xen_evtchn_cpu_prepare(cpu);
++ break;
++ case CPU_DEAD:
++ ret = xen_evtchn_cpu_dead(cpu);
++ break;
++ default:
++ break;
++ }
++
++ return ret < 0 ? NOTIFY_BAD : NOTIFY_OK;
++}
++
++static struct notifier_block evtchn_cpu_notifier = {
++ .notifier_call = evtchn_cpu_notification,
++};
++
+ void __init xen_init_IRQ(void)
+ {
+ int ret = -EINVAL;
+@@ -1694,6 +2080,10 @@ void __init xen_init_IRQ(void)
+ if (ret < 0)
+ xen_evtchn_2l_init();
+
++ xen_cpu_init_eoi(smp_processor_id());
++
++ register_cpu_notifier(&evtchn_cpu_notifier);
++
+ evtchn_to_irq = kcalloc(EVTCHN_ROW(xen_evtchn_max_channels()),
+ sizeof(*evtchn_to_irq), GFP_KERNEL);
+ BUG_ON(!evtchn_to_irq);
+diff --git a/drivers/xen/events/events_fifo.c b/drivers/xen/events/events_fifo.c
+index 96a1b8da53715..7addca0d8d26b 100644
+--- a/drivers/xen/events/events_fifo.c
++++ b/drivers/xen/events/events_fifo.c
+@@ -227,19 +227,25 @@ static bool evtchn_fifo_is_masked(unsigned port)
+ return sync_test_bit(EVTCHN_FIFO_BIT(MASKED, word), BM(word));
+ }
+ /*
+- * Clear MASKED, spinning if BUSY is set.
++ * Clear MASKED if not PENDING, spinning if BUSY is set.
++ * Return true if mask was cleared.
+ */
+-static void clear_masked(volatile event_word_t *word)
++static bool clear_masked_cond(volatile event_word_t *word)
+ {
+ event_word_t new, old, w;
+
+ w = *word;
+
+ do {
++ if (w & (1 << EVTCHN_FIFO_PENDING))
++ return false;
++
+ old = w & ~(1 << EVTCHN_FIFO_BUSY);
+ new = old & ~(1 << EVTCHN_FIFO_MASKED);
+ w = sync_cmpxchg(word, old, new);
+ } while (w != old);
++
++ return true;
+ }
+
+ static void evtchn_fifo_unmask(unsigned port)
+@@ -248,8 +254,7 @@ static void evtchn_fifo_unmask(unsigned port)
+
+ BUG_ON(!irqs_disabled());
+
+- clear_masked(word);
+- if (evtchn_fifo_is_pending(port)) {
++ if (!clear_masked_cond(word)) {
+ struct evtchn_unmask unmask = { .port = port };
+ (void)HYPERVISOR_event_channel_op(EVTCHNOP_unmask, &unmask);
+ }
+@@ -270,19 +275,9 @@ static uint32_t clear_linked(volatile event_word_t *word)
+ return w & EVTCHN_FIFO_LINK_MASK;
+ }
+
+-static void handle_irq_for_port(unsigned port)
+-{
+- int irq;
+-
+- irq = get_evtchn_to_irq(port);
+- if (irq != -1)
+- generic_handle_irq(irq);
+-}
+-
+-static void consume_one_event(unsigned cpu,
++static void consume_one_event(unsigned cpu, struct evtchn_loop_ctrl *ctrl,
+ struct evtchn_fifo_control_block *control_block,
+- unsigned priority, unsigned long *ready,
+- bool drop)
++ unsigned priority, unsigned long *ready)
+ {
+ struct evtchn_fifo_queue *q = &per_cpu(cpu_queue, cpu);
+ uint32_t head;
+@@ -315,16 +310,17 @@ static void consume_one_event(unsigned cpu,
+ clear_bit(priority, ready);
+
+ if (evtchn_fifo_is_pending(port) && !evtchn_fifo_is_masked(port)) {
+- if (unlikely(drop))
++ if (unlikely(!ctrl))
+ pr_warn("Dropping pending event for port %u\n", port);
+ else
+- handle_irq_for_port(port);
++ handle_irq_for_port(port, ctrl);
+ }
+
+ q->head[priority] = head;
+ }
+
+-static void __evtchn_fifo_handle_events(unsigned cpu, bool drop)
++static void __evtchn_fifo_handle_events(unsigned cpu,
++ struct evtchn_loop_ctrl *ctrl)
+ {
+ struct evtchn_fifo_control_block *control_block;
+ unsigned long ready;
+@@ -336,14 +332,15 @@ static void __evtchn_fifo_handle_events(unsigned cpu, bool drop)
+
+ while (ready) {
+ q = find_first_bit(&ready, EVTCHN_FIFO_MAX_QUEUES);
+- consume_one_event(cpu, control_block, q, &ready, drop);
++ consume_one_event(cpu, ctrl, control_block, q, &ready);
+ ready |= xchg(&control_block->ready, 0);
+ }
+ }
+
+-static void evtchn_fifo_handle_events(unsigned cpu)
++static void evtchn_fifo_handle_events(unsigned cpu,
++ struct evtchn_loop_ctrl *ctrl)
+ {
+- __evtchn_fifo_handle_events(cpu, false);
++ __evtchn_fifo_handle_events(cpu, ctrl);
+ }
+
+ static void evtchn_fifo_resume(void)
+@@ -381,21 +378,6 @@ static void evtchn_fifo_resume(void)
+ event_array_pages = 0;
+ }
+
+-static const struct evtchn_ops evtchn_ops_fifo = {
+- .max_channels = evtchn_fifo_max_channels,
+- .nr_channels = evtchn_fifo_nr_channels,
+- .setup = evtchn_fifo_setup,
+- .bind_to_cpu = evtchn_fifo_bind_to_cpu,
+- .clear_pending = evtchn_fifo_clear_pending,
+- .set_pending = evtchn_fifo_set_pending,
+- .is_pending = evtchn_fifo_is_pending,
+- .test_and_set_mask = evtchn_fifo_test_and_set_mask,
+- .mask = evtchn_fifo_mask,
+- .unmask = evtchn_fifo_unmask,
+- .handle_events = evtchn_fifo_handle_events,
+- .resume = evtchn_fifo_resume,
+-};
+-
+ static int evtchn_fifo_alloc_control_block(unsigned cpu)
+ {
+ void *control_block = NULL;
+@@ -418,29 +400,34 @@ static int evtchn_fifo_alloc_control_block(unsigned cpu)
+ return ret;
+ }
+
+-static int evtchn_fifo_cpu_notification(struct notifier_block *self,
+- unsigned long action,
+- void *hcpu)
++static int evtchn_fifo_percpu_init(unsigned int cpu)
+ {
+- int cpu = (long)hcpu;
+- int ret = 0;
+-
+- switch (action) {
+- case CPU_UP_PREPARE:
+- if (!per_cpu(cpu_control_block, cpu))
+- ret = evtchn_fifo_alloc_control_block(cpu);
+- break;
+- case CPU_DEAD:
+- __evtchn_fifo_handle_events(cpu, true);
+- break;
+- default:
+- break;
+- }
+- return ret < 0 ? NOTIFY_BAD : NOTIFY_OK;
++ if (!per_cpu(cpu_control_block, cpu))
++ return evtchn_fifo_alloc_control_block(cpu);
++ return 0;
++}
++
++static int evtchn_fifo_percpu_deinit(unsigned int cpu)
++{
++ __evtchn_fifo_handle_events(cpu, NULL);
++ return 0;
+ }
+
+-static struct notifier_block evtchn_fifo_cpu_notifier = {
+- .notifier_call = evtchn_fifo_cpu_notification,
++static const struct evtchn_ops evtchn_ops_fifo = {
++ .max_channels = evtchn_fifo_max_channels,
++ .nr_channels = evtchn_fifo_nr_channels,
++ .setup = evtchn_fifo_setup,
++ .bind_to_cpu = evtchn_fifo_bind_to_cpu,
++ .clear_pending = evtchn_fifo_clear_pending,
++ .set_pending = evtchn_fifo_set_pending,
++ .is_pending = evtchn_fifo_is_pending,
++ .test_and_set_mask = evtchn_fifo_test_and_set_mask,
++ .mask = evtchn_fifo_mask,
++ .unmask = evtchn_fifo_unmask,
++ .handle_events = evtchn_fifo_handle_events,
++ .resume = evtchn_fifo_resume,
++ .percpu_init = evtchn_fifo_percpu_init,
++ .percpu_deinit = evtchn_fifo_percpu_deinit,
+ };
+
+ int __init xen_evtchn_fifo_init(void)
+@@ -456,7 +443,6 @@ int __init xen_evtchn_fifo_init(void)
+
+ evtchn_ops = &evtchn_ops_fifo;
+
+- register_cpu_notifier(&evtchn_fifo_cpu_notifier);
+ out:
+ put_cpu();
+ return ret;
+diff --git a/drivers/xen/events/events_internal.h b/drivers/xen/events/events_internal.h
+index 50c2050a1e320..b9b4f59198930 100644
+--- a/drivers/xen/events/events_internal.h
++++ b/drivers/xen/events/events_internal.h
+@@ -32,11 +32,16 @@ enum xen_irq_type {
+ */
+ struct irq_info {
+ struct list_head list;
+- int refcnt;
++ struct list_head eoi_list;
++ short refcnt;
++ short spurious_cnt;
+ enum xen_irq_type type; /* type */
+ unsigned irq;
+ unsigned int evtchn; /* event channel */
+ unsigned short cpu; /* cpu bound */
++ unsigned short eoi_cpu; /* EOI must happen on this cpu */
++ unsigned int irq_epoch; /* If eoi_cpu valid: irq_epoch of event */
++ u64 eoi_time; /* Time in jiffies when to EOI. */
+
+ union {
+ unsigned short virq;
+@@ -55,6 +60,8 @@ struct irq_info {
+ #define PIRQ_SHAREABLE (1 << 1)
+ #define PIRQ_MSI_GROUP (1 << 2)
+
++struct evtchn_loop_ctrl;
++
+ struct evtchn_ops {
+ unsigned (*max_channels)(void);
+ unsigned (*nr_channels)(void);
+@@ -69,14 +76,18 @@ struct evtchn_ops {
+ void (*mask)(unsigned port);
+ void (*unmask)(unsigned port);
+
+- void (*handle_events)(unsigned cpu);
++ void (*handle_events)(unsigned cpu, struct evtchn_loop_ctrl *ctrl);
+ void (*resume)(void);
++
++ int (*percpu_init)(unsigned int cpu);
++ int (*percpu_deinit)(unsigned int cpu);
+ };
+
+ extern const struct evtchn_ops *evtchn_ops;
+
+ extern int **evtchn_to_irq;
+ int get_evtchn_to_irq(unsigned int evtchn);
++void handle_irq_for_port(evtchn_port_t port, struct evtchn_loop_ctrl *ctrl);
+
+ struct irq_info *info_for_irq(unsigned irq);
+ unsigned cpu_from_irq(unsigned irq);
+@@ -134,9 +145,10 @@ static inline void unmask_evtchn(unsigned port)
+ return evtchn_ops->unmask(port);
+ }
+
+-static inline void xen_evtchn_handle_events(unsigned cpu)
++static inline void xen_evtchn_handle_events(unsigned cpu,
++ struct evtchn_loop_ctrl *ctrl)
+ {
+- return evtchn_ops->handle_events(cpu);
++ return evtchn_ops->handle_events(cpu, ctrl);
+ }
+
+ static inline void xen_evtchn_resume(void)
+diff --git a/drivers/xen/evtchn.c b/drivers/xen/evtchn.c
+index f4edd6df3df23..96c3007576b62 100644
+--- a/drivers/xen/evtchn.c
++++ b/drivers/xen/evtchn.c
+@@ -173,7 +173,6 @@ static irqreturn_t evtchn_interrupt(int irq, void *data)
+ "Interrupt for port %d, but apparently not enabled; per-user %p\n",
+ evtchn->port, u);
+
+- disable_irq_nosync(irq);
+ evtchn->enabled = false;
+
+ spin_lock(&u->ring_prod_lock);
+@@ -299,7 +298,7 @@ static ssize_t evtchn_write(struct file *file, const char __user *buf,
+ evtchn = find_evtchn(u, port);
+ if (evtchn && !evtchn->enabled) {
+ evtchn->enabled = true;
+- enable_irq(irq_from_evtchn(port));
++ xen_irq_lateeoi(irq_from_evtchn(port), 0);
+ }
+ }
+
+@@ -399,8 +398,8 @@ static int evtchn_bind_to_user(struct per_user_data *u, int port)
+ if (rc < 0)
+ goto err;
+
+- rc = bind_evtchn_to_irqhandler(port, evtchn_interrupt, 0,
+- u->name, evtchn);
++ rc = bind_evtchn_to_irqhandler_lateeoi(port, evtchn_interrupt, 0,
++ u->name, evtchn);
+ if (rc < 0)
+ goto err;
+
+diff --git a/drivers/xen/xen-pciback/pci_stub.c b/drivers/xen/xen-pciback/pci_stub.c
+index 47c6df53cabfb..e21b82921c335 100644
+--- a/drivers/xen/xen-pciback/pci_stub.c
++++ b/drivers/xen/xen-pciback/pci_stub.c
+@@ -681,10 +681,17 @@ static pci_ers_result_t common_process(struct pcistub_device *psdev,
+ wmb();
+ notify_remote_via_irq(pdev->evtchn_irq);
+
++ /* Enable IRQ to signal "request done". */
++ xen_pcibk_lateeoi(pdev, 0);
++
+ ret = wait_event_timeout(xen_pcibk_aer_wait_queue,
+ !(test_bit(_XEN_PCIB_active, (unsigned long *)
+ &sh_info->flags)), 300*HZ);
+
++ /* Enable IRQ for pcifront request if not already active. */
++ if (!test_bit(_PDEVF_op_active, &pdev->flags))
++ xen_pcibk_lateeoi(pdev, 0);
++
+ if (!ret) {
+ if (test_bit(_XEN_PCIB_active,
+ (unsigned long *)&sh_info->flags)) {
+@@ -698,13 +705,6 @@ static pci_ers_result_t common_process(struct pcistub_device *psdev,
+ }
+ clear_bit(_PCIB_op_pending, (unsigned long *)&pdev->flags);
+
+- if (test_bit(_XEN_PCIF_active,
+- (unsigned long *)&sh_info->flags)) {
+- dev_dbg(&psdev->dev->dev,
+- "schedule pci_conf service in " DRV_NAME "\n");
+- xen_pcibk_test_and_schedule_op(psdev->pdev);
+- }
+-
+ res = (pci_ers_result_t)aer_op->err;
+ return res;
+ }
+diff --git a/drivers/xen/xen-pciback/pciback.h b/drivers/xen/xen-pciback/pciback.h
+index 4d529f3e40df9..f44a425d1a5a1 100644
+--- a/drivers/xen/xen-pciback/pciback.h
++++ b/drivers/xen/xen-pciback/pciback.h
+@@ -13,6 +13,7 @@
+ #include <linux/spinlock.h>
+ #include <linux/workqueue.h>
+ #include <linux/atomic.h>
++#include <xen/events.h>
+ #include <xen/interface/io/pciif.h>
+
+ #define DRV_NAME "xen-pciback"
+@@ -26,6 +27,8 @@ struct pci_dev_entry {
+ #define PDEVF_op_active (1<<(_PDEVF_op_active))
+ #define _PCIB_op_pending (1)
+ #define PCIB_op_pending (1<<(_PCIB_op_pending))
++#define _EOI_pending (2)
++#define EOI_pending (1<<(_EOI_pending))
+
+ struct xen_pcibk_device {
+ void *pci_dev_data;
+@@ -182,12 +185,17 @@ static inline void xen_pcibk_release_devices(struct xen_pcibk_device *pdev)
+ irqreturn_t xen_pcibk_handle_event(int irq, void *dev_id);
+ void xen_pcibk_do_op(struct work_struct *data);
+
++static inline void xen_pcibk_lateeoi(struct xen_pcibk_device *pdev,
++ unsigned int eoi_flag)
++{
++ if (test_and_clear_bit(_EOI_pending, &pdev->flags))
++ xen_irq_lateeoi(pdev->evtchn_irq, eoi_flag);
++}
++
+ int xen_pcibk_xenbus_register(void);
+ void xen_pcibk_xenbus_unregister(void);
+
+ extern int verbose_request;
+-
+-void xen_pcibk_test_and_schedule_op(struct xen_pcibk_device *pdev);
+ #endif
+
+ /* Handles shared IRQs that can to device domain and control domain. */
+diff --git a/drivers/xen/xen-pciback/pciback_ops.c b/drivers/xen/xen-pciback/pciback_ops.c
+index 49c5f0e9600aa..232db7fcc5236 100644
+--- a/drivers/xen/xen-pciback/pciback_ops.c
++++ b/drivers/xen/xen-pciback/pciback_ops.c
+@@ -296,26 +296,41 @@ int xen_pcibk_disable_msix(struct xen_pcibk_device *pdev,
+ return 0;
+ }
+ #endif
++
++static inline bool xen_pcibk_test_op_pending(struct xen_pcibk_device *pdev)
++{
++ return test_bit(_XEN_PCIF_active,
++ (unsigned long *)&pdev->sh_info->flags) &&
++ !test_and_set_bit(_PDEVF_op_active, &pdev->flags);
++}
++
+ /*
+ * Now the same evtchn is used for both pcifront conf_read_write request
+ * as well as pcie aer front end ack. We use a new work_queue to schedule
+ * xen_pcibk conf_read_write service for avoiding confict with aer_core
+ * do_recovery job which also use the system default work_queue
+ */
+-void xen_pcibk_test_and_schedule_op(struct xen_pcibk_device *pdev)
++static void xen_pcibk_test_and_schedule_op(struct xen_pcibk_device *pdev)
+ {
++ bool eoi = true;
++
+ /* Check that frontend is requesting an operation and that we are not
+ * already processing a request */
+- if (test_bit(_XEN_PCIF_active, (unsigned long *)&pdev->sh_info->flags)
+- && !test_and_set_bit(_PDEVF_op_active, &pdev->flags)) {
++ if (xen_pcibk_test_op_pending(pdev)) {
+ queue_work(xen_pcibk_wq, &pdev->op_work);
++ eoi = false;
+ }
+ /*_XEN_PCIB_active should have been cleared by pcifront. And also make
+ sure xen_pcibk is waiting for ack by checking _PCIB_op_pending*/
+ if (!test_bit(_XEN_PCIB_active, (unsigned long *)&pdev->sh_info->flags)
+ && test_bit(_PCIB_op_pending, &pdev->flags)) {
+ wake_up(&xen_pcibk_aer_wait_queue);
++ eoi = false;
+ }
++
++ /* EOI if there was nothing to do. */
++ if (eoi)
++ xen_pcibk_lateeoi(pdev, XEN_EOI_FLAG_SPURIOUS);
+ }
+
+ /* Performing the configuration space reads/writes must not be done in atomic
+@@ -323,10 +338,8 @@ void xen_pcibk_test_and_schedule_op(struct xen_pcibk_device *pdev)
+ * use of semaphores). This function is intended to be called from a work
+ * queue in process context taking a struct xen_pcibk_device as a parameter */
+
+-void xen_pcibk_do_op(struct work_struct *data)
++static void xen_pcibk_do_one_op(struct xen_pcibk_device *pdev)
+ {
+- struct xen_pcibk_device *pdev =
+- container_of(data, struct xen_pcibk_device, op_work);
+ struct pci_dev *dev;
+ struct xen_pcibk_dev_data *dev_data = NULL;
+ struct xen_pci_op *op = &pdev->op;
+@@ -399,16 +412,31 @@ void xen_pcibk_do_op(struct work_struct *data)
+ smp_mb__before_atomic(); /* /after/ clearing PCIF_active */
+ clear_bit(_PDEVF_op_active, &pdev->flags);
+ smp_mb__after_atomic(); /* /before/ final check for work */
++}
+
+- /* Check to see if the driver domain tried to start another request in
+- * between clearing _XEN_PCIF_active and clearing _PDEVF_op_active.
+- */
+- xen_pcibk_test_and_schedule_op(pdev);
++void xen_pcibk_do_op(struct work_struct *data)
++{
++ struct xen_pcibk_device *pdev =
++ container_of(data, struct xen_pcibk_device, op_work);
++
++ do {
++ xen_pcibk_do_one_op(pdev);
++ } while (xen_pcibk_test_op_pending(pdev));
++
++ xen_pcibk_lateeoi(pdev, 0);
+ }
+
+ irqreturn_t xen_pcibk_handle_event(int irq, void *dev_id)
+ {
+ struct xen_pcibk_device *pdev = dev_id;
++ bool eoi;
++
++ /* IRQs might come in before pdev->evtchn_irq is written. */
++ if (unlikely(pdev->evtchn_irq != irq))
++ pdev->evtchn_irq = irq;
++
++ eoi = test_and_set_bit(_EOI_pending, &pdev->flags);
++ WARN(eoi, "IRQ while EOI pending\n");
+
+ xen_pcibk_test_and_schedule_op(pdev);
+
+diff --git a/drivers/xen/xen-pciback/xenbus.c b/drivers/xen/xen-pciback/xenbus.c
+index 4843741e703a3..48196347f2f94 100644
+--- a/drivers/xen/xen-pciback/xenbus.c
++++ b/drivers/xen/xen-pciback/xenbus.c
+@@ -124,7 +124,7 @@ static int xen_pcibk_do_attach(struct xen_pcibk_device *pdev, int gnt_ref,
+
+ pdev->sh_info = vaddr;
+
+- err = bind_interdomain_evtchn_to_irqhandler(
++ err = bind_interdomain_evtchn_to_irqhandler_lateeoi(
+ pdev->xdev->otherend_id, remote_evtchn, xen_pcibk_handle_event,
+ 0, DRV_NAME, pdev);
+ if (err < 0) {
+diff --git a/drivers/xen/xen-scsiback.c b/drivers/xen/xen-scsiback.c
+index 51387d75c7bf1..29a1b8054a4dc 100644
+--- a/drivers/xen/xen-scsiback.c
++++ b/drivers/xen/xen-scsiback.c
+@@ -91,7 +91,6 @@ struct vscsibk_info {
+ unsigned int irq;
+
+ struct vscsiif_back_ring ring;
+- int ring_error;
+
+ spinlock_t ring_lock;
+ atomic_t nr_unreplied_reqs;
+@@ -698,7 +697,8 @@ static int prepare_pending_reqs(struct vscsibk_info *info,
+ return 0;
+ }
+
+-static int scsiback_do_cmd_fn(struct vscsibk_info *info)
++static int scsiback_do_cmd_fn(struct vscsibk_info *info,
++ unsigned int *eoi_flags)
+ {
+ struct vscsiif_back_ring *ring = &info->ring;
+ struct vscsiif_request ring_req;
+@@ -715,11 +715,12 @@ static int scsiback_do_cmd_fn(struct vscsibk_info *info)
+ rc = ring->rsp_prod_pvt;
+ pr_warn("Dom%d provided bogus ring requests (%#x - %#x = %u). Halting ring processing\n",
+ info->domid, rp, rc, rp - rc);
+- info->ring_error = 1;
+- return 0;
++ return -EINVAL;
+ }
+
+ while ((rc != rp)) {
++ *eoi_flags &= ~XEN_EOI_FLAG_SPURIOUS;
++
+ if (RING_REQUEST_CONS_OVERFLOW(ring, rc))
+ break;
+ pending_req = kmem_cache_alloc(scsiback_cachep, GFP_KERNEL);
+@@ -782,13 +783,16 @@ static int scsiback_do_cmd_fn(struct vscsibk_info *info)
+ static irqreturn_t scsiback_irq_fn(int irq, void *dev_id)
+ {
+ struct vscsibk_info *info = dev_id;
++ int rc;
++ unsigned int eoi_flags = XEN_EOI_FLAG_SPURIOUS;
+
+- if (info->ring_error)
+- return IRQ_HANDLED;
+-
+- while (scsiback_do_cmd_fn(info))
++ while ((rc = scsiback_do_cmd_fn(info, &eoi_flags)) > 0)
+ cond_resched();
+
++ /* In case of a ring error we keep the event channel masked. */
++ if (!rc)
++ xen_irq_lateeoi(irq, eoi_flags);
++
+ return IRQ_HANDLED;
+ }
+
+@@ -809,7 +813,7 @@ static int scsiback_init_sring(struct vscsibk_info *info, grant_ref_t ring_ref,
+ sring = (struct vscsiif_sring *)area;
+ BACK_RING_INIT(&info->ring, sring, PAGE_SIZE);
+
+- err = bind_interdomain_evtchn_to_irq(info->domid, evtchn);
++ err = bind_interdomain_evtchn_to_irq_lateeoi(info->domid, evtchn);
+ if (err < 0)
+ goto unmap_page;
+
+@@ -1210,7 +1214,6 @@ static int scsiback_probe(struct xenbus_device *dev,
+
+ info->domid = dev->otherend_id;
+ spin_lock_init(&info->ring_lock);
+- info->ring_error = 0;
+ atomic_set(&info->nr_unreplied_reqs, 0);
+ init_waitqueue_head(&info->waiting_to_free);
+ info->dev = dev;
+diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
+index 97a80238fdee3..b28bc7690d4b3 100644
+--- a/fs/btrfs/extent_io.c
++++ b/fs/btrfs/extent_io.c
+@@ -4000,6 +4000,10 @@ retry:
+ if (!ret) {
+ free_extent_buffer(eb);
+ continue;
++ } else if (ret < 0) {
++ done = 1;
++ free_extent_buffer(eb);
++ break;
+ }
+
+ ret = write_one_eb(eb, fs_info, wbc, &epd);
+diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
+index 67366515a29d2..f35e18e76f160 100644
+--- a/fs/btrfs/ioctl.c
++++ b/fs/btrfs/ioctl.c
+@@ -3856,6 +3856,8 @@ process_slot:
+ ret = -EINTR;
+ goto out;
+ }
++
++ cond_resched();
+ }
+ ret = 0;
+
+diff --git a/fs/cifs/cifs_unicode.c b/fs/cifs/cifs_unicode.c
+index 211ac472cb9dc..942874257a092 100644
+--- a/fs/cifs/cifs_unicode.c
++++ b/fs/cifs/cifs_unicode.c
+@@ -493,7 +493,13 @@ cifsConvertToUTF16(__le16 *target, const char *source, int srclen,
+ else if (map_chars == SFM_MAP_UNI_RSVD) {
+ bool end_of_string;
+
+- if (i == srclen - 1)
++ /**
++ * Remap spaces and periods found at the end of every
++ * component of the path. The special cases of '.' and
++ * '..' do not need to be dealt with explicitly because
++ * they are addressed in namei.c:link_path_walk().
++ **/
++ if ((i == srclen - 1) || (source[i+1] == '\\'))
+ end_of_string = true;
+ else
+ end_of_string = false;
+diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
+index 00f9433eea23a..df585267d3c25 100644
+--- a/fs/ext4/inline.c
++++ b/fs/ext4/inline.c
+@@ -1892,6 +1892,7 @@ void ext4_inline_data_truncate(struct inode *inode, int *has_inline)
+
+ ext4_write_lock_xattr(inode, &no_expand);
+ if (!ext4_has_inline_data(inode)) {
++ ext4_write_unlock_xattr(inode, &no_expand);
+ *has_inline = 0;
+ ext4_journal_stop(handle);
+ return;
+diff --git a/fs/ext4/super.c b/fs/ext4/super.c
+index 6350971852e19..7a5a1602ee01d 100644
+--- a/fs/ext4/super.c
++++ b/fs/ext4/super.c
+@@ -1452,8 +1452,8 @@ static const struct mount_opts {
+ MOPT_SET | MOPT_Q},
+ {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA |
+ EXT4_MOUNT_GRPQUOTA), MOPT_CLEAR | MOPT_Q},
+- {Opt_usrjquota, 0, MOPT_Q},
+- {Opt_grpjquota, 0, MOPT_Q},
++ {Opt_usrjquota, 0, MOPT_Q | MOPT_STRING},
++ {Opt_grpjquota, 0, MOPT_Q | MOPT_STRING},
+ {Opt_offusrjquota, 0, MOPT_Q},
+ {Opt_offgrpjquota, 0, MOPT_Q},
+ {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT},
+@@ -4168,6 +4168,7 @@ cantfind_ext4:
+ #ifdef CONFIG_QUOTA
+ failed_mount8:
+ ext4_unregister_sysfs(sb);
++ kobject_put(&sbi->s_kobj);
+ #endif
+ failed_mount7:
+ ext4_unregister_li_request(sb);
+diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
+index 1eb737c466ddc..8e8695eb652af 100644
+--- a/fs/gfs2/glock.c
++++ b/fs/gfs2/glock.c
+@@ -751,7 +751,8 @@ again:
+ }
+ kfree(gl->gl_lksb.sb_lvbptr);
+ kmem_cache_free(cachep, gl);
+- atomic_dec(&sdp->sd_glock_disposal);
++ if (atomic_dec_and_test(&sdp->sd_glock_disposal))
++ wake_up(&sdp->sd_glock_wait);
+ *glp = tmp;
+
+ return ret;
+diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c
+index 2736e9cfc2ee9..faa5e0e2c4493 100644
+--- a/fs/gfs2/rgrp.c
++++ b/fs/gfs2/rgrp.c
+@@ -747,9 +747,9 @@ void gfs2_clear_rgrpd(struct gfs2_sbd *sdp)
+ }
+
+ gfs2_free_clones(rgd);
++ return_all_reservations(rgd);
+ kfree(rgd->rd_bits);
+ rgd->rd_bits = NULL;
+- return_all_reservations(rgd);
+ kmem_cache_free(gfs2_rgrpd_cachep, rgd);
+ }
+ }
+@@ -1388,6 +1388,9 @@ int gfs2_fitrim(struct file *filp, void __user *argp)
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
++ if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags))
++ return -EROFS;
++
+ if (!blk_queue_discard(q))
+ return -EOPNOTSUPP;
+
+diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
+index d97403bb36226..0ee1f088bace8 100644
+--- a/fs/ocfs2/super.c
++++ b/fs/ocfs2/super.c
+@@ -1751,6 +1751,7 @@ static void ocfs2_inode_init_once(void *data)
+
+ oi->ip_blkno = 0ULL;
+ oi->ip_clusters = 0;
++ oi->ip_next_orphan = NULL;
+
+ ocfs2_resv_init_once(&oi->ip_la_data_resv);
+
+diff --git a/fs/xfs/xfs_pnfs.c b/fs/xfs/xfs_pnfs.c
+index dc6221942b85f..ab66ea0a72bfb 100644
+--- a/fs/xfs/xfs_pnfs.c
++++ b/fs/xfs/xfs_pnfs.c
+@@ -162,7 +162,7 @@ xfs_fs_map_blocks(
+ goto out_unlock;
+ error = invalidate_inode_pages2(inode->i_mapping);
+ if (WARN_ON_ONCE(error))
+- return error;
++ goto out_unlock;
+
+ end_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)offset + length);
+ offset_fsb = XFS_B_TO_FSBT(mp, offset);
+diff --git a/include/linux/can/skb.h b/include/linux/can/skb.h
+index 51bb6532785c3..1a2111c775ae1 100644
+--- a/include/linux/can/skb.h
++++ b/include/linux/can/skb.h
+@@ -60,21 +60,17 @@ static inline void can_skb_set_owner(struct sk_buff *skb, struct sock *sk)
+ */
+ static inline struct sk_buff *can_create_echo_skb(struct sk_buff *skb)
+ {
+- if (skb_shared(skb)) {
+- struct sk_buff *nskb = skb_clone(skb, GFP_ATOMIC);
++ struct sk_buff *nskb;
+
+- if (likely(nskb)) {
+- can_skb_set_owner(nskb, skb->sk);
+- consume_skb(skb);
+- return nskb;
+- } else {
+- kfree_skb(skb);
+- return NULL;
+- }
++ nskb = skb_clone(skb, GFP_ATOMIC);
++ if (unlikely(!nskb)) {
++ kfree_skb(skb);
++ return NULL;
+ }
+
+- /* we can assume to have an unshared skb with proper owner */
+- return skb;
++ can_skb_set_owner(nskb, skb->sk);
++ consume_skb(skb);
++ return nskb;
+ }
+
+ #endif /* !_CAN_SKB_H */
+diff --git a/include/linux/prandom.h b/include/linux/prandom.h
+index aa16e6468f91e..cc1e71334e53c 100644
+--- a/include/linux/prandom.h
++++ b/include/linux/prandom.h
+@@ -16,12 +16,44 @@ void prandom_bytes(void *buf, size_t nbytes);
+ void prandom_seed(u32 seed);
+ void prandom_reseed_late(void);
+
++#if BITS_PER_LONG == 64
++/*
++ * The core SipHash round function. Each line can be executed in
++ * parallel given enough CPU resources.
++ */
++#define PRND_SIPROUND(v0, v1, v2, v3) ( \
++ v0 += v1, v1 = rol64(v1, 13), v2 += v3, v3 = rol64(v3, 16), \
++ v1 ^= v0, v0 = rol64(v0, 32), v3 ^= v2, \
++ v0 += v3, v3 = rol64(v3, 21), v2 += v1, v1 = rol64(v1, 17), \
++ v3 ^= v0, v1 ^= v2, v2 = rol64(v2, 32) \
++)
++
++#define PRND_K0 (0x736f6d6570736575 ^ 0x6c7967656e657261)
++#define PRND_K1 (0x646f72616e646f6d ^ 0x7465646279746573)
++
++#elif BITS_PER_LONG == 32
++/*
++ * On 32-bit machines, we use HSipHash, a reduced-width version of SipHash.
++ * This is weaker, but 32-bit machines are not used for high-traffic
++ * applications, so there is less output for an attacker to analyze.
++ */
++#define PRND_SIPROUND(v0, v1, v2, v3) ( \
++ v0 += v1, v1 = rol32(v1, 5), v2 += v3, v3 = rol32(v3, 8), \
++ v1 ^= v0, v0 = rol32(v0, 16), v3 ^= v2, \
++ v0 += v3, v3 = rol32(v3, 7), v2 += v1, v1 = rol32(v1, 13), \
++ v3 ^= v0, v1 ^= v2, v2 = rol32(v2, 16) \
++)
++#define PRND_K0 0x6c796765
++#define PRND_K1 0x74656462
++
++#else
++#error Unsupported BITS_PER_LONG
++#endif
++
+ struct rnd_state {
+ __u32 s1, s2, s3, s4;
+ };
+
+-DECLARE_PER_CPU(struct rnd_state, net_rand_state);
+-
+ u32 prandom_u32_state(struct rnd_state *state);
+ void prandom_bytes_state(struct rnd_state *state, void *buf, size_t nbytes);
+ void prandom_seed_full_state(struct rnd_state __percpu *pcpu_state);
+diff --git a/include/linux/time64.h b/include/linux/time64.h
+index 367d5af899e81..10239cffd70f8 100644
+--- a/include/linux/time64.h
++++ b/include/linux/time64.h
+@@ -197,6 +197,10 @@ static inline bool timespec64_valid_strict(const struct timespec64 *ts)
+ */
+ static inline s64 timespec64_to_ns(const struct timespec64 *ts)
+ {
++ /* Prevent multiplication overflow */
++ if ((unsigned long long)ts->tv_sec >= KTIME_SEC_MAX)
++ return KTIME_MAX;
++
+ return ((s64) ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec;
+ }
+
+diff --git a/include/xen/events.h b/include/xen/events.h
+index 88da2abaf5359..ad0c61cf399be 100644
+--- a/include/xen/events.h
++++ b/include/xen/events.h
+@@ -12,11 +12,16 @@
+
+ unsigned xen_evtchn_nr_channels(void);
+
+-int bind_evtchn_to_irq(unsigned int evtchn);
+-int bind_evtchn_to_irqhandler(unsigned int evtchn,
++int bind_evtchn_to_irq(evtchn_port_t evtchn);
++int bind_evtchn_to_irq_lateeoi(evtchn_port_t evtchn);
++int bind_evtchn_to_irqhandler(evtchn_port_t evtchn,
+ irq_handler_t handler,
+ unsigned long irqflags, const char *devname,
+ void *dev_id);
++int bind_evtchn_to_irqhandler_lateeoi(evtchn_port_t evtchn,
++ irq_handler_t handler,
++ unsigned long irqflags, const char *devname,
++ void *dev_id);
+ int bind_virq_to_irq(unsigned int virq, unsigned int cpu, bool percpu);
+ int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu,
+ irq_handler_t handler,
+@@ -29,13 +34,21 @@ int bind_ipi_to_irqhandler(enum ipi_vector ipi,
+ const char *devname,
+ void *dev_id);
+ int bind_interdomain_evtchn_to_irq(unsigned int remote_domain,
+- unsigned int remote_port);
++ evtchn_port_t remote_port);
++int bind_interdomain_evtchn_to_irq_lateeoi(unsigned int remote_domain,
++ evtchn_port_t remote_port);
+ int bind_interdomain_evtchn_to_irqhandler(unsigned int remote_domain,
+- unsigned int remote_port,
++ evtchn_port_t remote_port,
+ irq_handler_t handler,
+ unsigned long irqflags,
+ const char *devname,
+ void *dev_id);
++int bind_interdomain_evtchn_to_irqhandler_lateeoi(unsigned int remote_domain,
++ evtchn_port_t remote_port,
++ irq_handler_t handler,
++ unsigned long irqflags,
++ const char *devname,
++ void *dev_id);
+
+ /*
+ * Common unbind function for all event sources. Takes IRQ to unbind from.
+@@ -44,6 +57,14 @@ int bind_interdomain_evtchn_to_irqhandler(unsigned int remote_domain,
+ */
+ void unbind_from_irqhandler(unsigned int irq, void *dev_id);
+
++/*
++ * Send late EOI for an IRQ bound to an event channel via one of the *_lateeoi
++ * functions above.
++ */
++void xen_irq_lateeoi(unsigned int irq, unsigned int eoi_flags);
++/* Signal an event was spurious, i.e. there was no action resulting from it. */
++#define XEN_EOI_FLAG_SPURIOUS 0x00000001
++
+ #define XEN_IRQ_PRIORITY_MAX EVTCHN_FIFO_PRIORITY_MAX
+ #define XEN_IRQ_PRIORITY_DEFAULT EVTCHN_FIFO_PRIORITY_DEFAULT
+ #define XEN_IRQ_PRIORITY_MIN EVTCHN_FIFO_PRIORITY_MIN
+diff --git a/kernel/events/core.c b/kernel/events/core.c
+index 388ce03155b40..d399748ea86b5 100644
+--- a/kernel/events/core.c
++++ b/kernel/events/core.c
+@@ -4664,11 +4664,11 @@ static void perf_mmap_open(struct vm_area_struct *vma)
+ static void perf_mmap_close(struct vm_area_struct *vma)
+ {
+ struct perf_event *event = vma->vm_file->private_data;
+-
+ struct ring_buffer *rb = ring_buffer_get(event);
+ struct user_struct *mmap_user = rb->mmap_user;
+ int mmap_locked = rb->mmap_locked;
+ unsigned long size = perf_data_size(rb);
++ bool detach_rest = false;
+
+ if (event->pmu->event_unmapped)
+ event->pmu->event_unmapped(event);
+@@ -4687,7 +4687,8 @@ static void perf_mmap_close(struct vm_area_struct *vma)
+ mutex_unlock(&event->mmap_mutex);
+ }
+
+- atomic_dec(&rb->mmap_count);
++ if (atomic_dec_and_test(&rb->mmap_count))
++ detach_rest = true;
+
+ if (!atomic_dec_and_mutex_lock(&event->mmap_count, &event->mmap_mutex))
+ goto out_put;
+@@ -4696,7 +4697,7 @@ static void perf_mmap_close(struct vm_area_struct *vma)
+ mutex_unlock(&event->mmap_mutex);
+
+ /* If there's still other mmap()s of this buffer, we're done. */
+- if (atomic_read(&rb->mmap_count))
++ if (!detach_rest)
+ goto out_put;
+
+ /*
+diff --git a/kernel/events/internal.h b/kernel/events/internal.h
+index 2bbad9c1274c3..8baa3121e7a6b 100644
+--- a/kernel/events/internal.h
++++ b/kernel/events/internal.h
+@@ -193,7 +193,7 @@ static inline int get_recursion_context(int *recursion)
+ rctx = 3;
+ else if (in_irq())
+ rctx = 2;
+- else if (in_softirq())
++ else if (in_serving_softirq())
+ rctx = 1;
+ else
+ rctx = 0;
+diff --git a/kernel/exit.c b/kernel/exit.c
+index 03f6722302b54..5c20a32c95392 100644
+--- a/kernel/exit.c
++++ b/kernel/exit.c
+@@ -408,7 +408,10 @@ static void exit_mm(struct task_struct *tsk)
+ up_read(&mm->mmap_sem);
+
+ self.task = tsk;
+- self.next = xchg(&core_state->dumper.next, &self);
++ if (self.task->flags & PF_SIGNALED)
++ self.next = xchg(&core_state->dumper.next, &self);
++ else
++ self.task = NULL;
+ /*
+ * Implies mb(), the result of xchg() must be visible
+ * to core_state->dumper.
+diff --git a/kernel/reboot.c b/kernel/reboot.c
+index bd30a973fe946..2946ed1d99d4d 100644
+--- a/kernel/reboot.c
++++ b/kernel/reboot.c
+@@ -512,22 +512,22 @@ static int __init reboot_setup(char *str)
+ break;
+
+ case 's':
+- {
+- int rc;
+-
+- if (isdigit(*(str+1))) {
+- rc = kstrtoint(str+1, 0, &reboot_cpu);
+- if (rc)
+- return rc;
+- } else if (str[1] == 'm' && str[2] == 'p' &&
+- isdigit(*(str+3))) {
+- rc = kstrtoint(str+3, 0, &reboot_cpu);
+- if (rc)
+- return rc;
+- } else
++ if (isdigit(*(str+1)))
++ reboot_cpu = simple_strtoul(str+1, NULL, 0);
++ else if (str[1] == 'm' && str[2] == 'p' &&
++ isdigit(*(str+3)))
++ reboot_cpu = simple_strtoul(str+3, NULL, 0);
++ else
+ reboot_mode = REBOOT_SOFT;
++ if (reboot_cpu >= num_possible_cpus()) {
++ pr_err("Ignoring the CPU number in reboot= option. "
++ "CPU %d exceeds possible cpu number %d\n",
++ reboot_cpu, num_possible_cpus());
++ reboot_cpu = 0;
++ break;
++ }
+ break;
+- }
++
+ case 'g':
+ reboot_mode = REBOOT_GPIO;
+ break;
+diff --git a/kernel/time/timer.c b/kernel/time/timer.c
+index 43bee4993187c..6ca409a460308 100644
+--- a/kernel/time/timer.c
++++ b/kernel/time/timer.c
+@@ -1432,13 +1432,6 @@ void update_process_times(int user_tick)
+ #endif
+ scheduler_tick();
+ run_posix_cpu_timers(p);
+-
+- /* The current CPU might make use of net randoms without receiving IRQs
+- * to renew them often enough. Let's update the net_rand_state from a
+- * non-constant value that's not affine to the number of calls to make
+- * sure it's updated when there's some activity (we don't care in idle).
+- */
+- this_cpu_add(net_rand_state.s1, rol32(jiffies, 24) + user_tick);
+ }
+
+ /*
+diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
+index 1c1ecc1d49ad2..547a3a5ac57b5 100644
+--- a/kernel/trace/ring_buffer.c
++++ b/kernel/trace/ring_buffer.c
+@@ -416,14 +416,16 @@ struct rb_event_info {
+
+ /*
+ * Used for which event context the event is in.
+- * NMI = 0
+- * IRQ = 1
+- * SOFTIRQ = 2
+- * NORMAL = 3
++ * TRANSITION = 0
++ * NMI = 1
++ * IRQ = 2
++ * SOFTIRQ = 3
++ * NORMAL = 4
+ *
+ * See trace_recursive_lock() comment below for more details.
+ */
+ enum {
++ RB_CTX_TRANSITION,
+ RB_CTX_NMI,
+ RB_CTX_IRQ,
+ RB_CTX_SOFTIRQ,
+@@ -2585,10 +2587,10 @@ rb_wakeups(struct ring_buffer *buffer, struct ring_buffer_per_cpu *cpu_buffer)
+ * a bit of overhead in something as critical as function tracing,
+ * we use a bitmask trick.
+ *
+- * bit 0 = NMI context
+- * bit 1 = IRQ context
+- * bit 2 = SoftIRQ context
+- * bit 3 = normal context.
++ * bit 1 = NMI context
++ * bit 2 = IRQ context
++ * bit 3 = SoftIRQ context
++ * bit 4 = normal context.
+ *
+ * This works because this is the order of contexts that can
+ * preempt other contexts. A SoftIRQ never preempts an IRQ
+@@ -2611,6 +2613,30 @@ rb_wakeups(struct ring_buffer *buffer, struct ring_buffer_per_cpu *cpu_buffer)
+ * The least significant bit can be cleared this way, and it
+ * just so happens that it is the same bit corresponding to
+ * the current context.
++ *
++ * Now the TRANSITION bit breaks the above slightly. The TRANSITION bit
++ * is set when a recursion is detected at the current context, and if
++ * the TRANSITION bit is already set, it will fail the recursion.
++ * This is needed because there's a lag between the changing of
++ * interrupt context and updating the preempt count. In this case,
++ * a false positive will be found. To handle this, one extra recursion
++ * is allowed, and this is done by the TRANSITION bit. If the TRANSITION
++ * bit is already set, then it is considered a recursion and the function
++ * ends. Otherwise, the TRANSITION bit is set, and that bit is returned.
++ *
++ * On the trace_recursive_unlock(), the TRANSITION bit will be the first
++ * to be cleared. Even if it wasn't the context that set it. That is,
++ * if an interrupt comes in while NORMAL bit is set and the ring buffer
++ * is called before preempt_count() is updated, since the check will
++ * be on the NORMAL bit, the TRANSITION bit will then be set. If an
++ * NMI then comes in, it will set the NMI bit, but when the NMI code
++ * does the trace_recursive_unlock() it will clear the TRANSTION bit
++ * and leave the NMI bit set. But this is fine, because the interrupt
++ * code that set the TRANSITION bit will then clear the NMI bit when it
++ * calls trace_recursive_unlock(). If another NMI comes in, it will
++ * set the TRANSITION bit and continue.
++ *
++ * Note: The TRANSITION bit only handles a single transition between context.
+ */
+
+ static __always_inline int
+@@ -2629,8 +2655,16 @@ trace_recursive_lock(struct ring_buffer_per_cpu *cpu_buffer)
+ } else
+ bit = RB_CTX_NORMAL;
+
+- if (unlikely(val & (1 << bit)))
+- return 1;
++ if (unlikely(val & (1 << bit))) {
++ /*
++ * It is possible that this was called by transitioning
++ * between interrupt context, and preempt_count() has not
++ * been updated yet. In this case, use the TRANSITION bit.
++ */
++ bit = RB_CTX_TRANSITION;
++ if (val & (1 << bit))
++ return 1;
++ }
+
+ val |= (1 << bit);
+ cpu_buffer->current_context = val;
+diff --git a/lib/random32.c b/lib/random32.c
+index 8072ccd9eed58..17e5780eebd72 100644
+--- a/lib/random32.c
++++ b/lib/random32.c
+@@ -39,16 +39,6 @@
+ #include <linux/sched.h>
+ #include <asm/unaligned.h>
+
+-#ifdef CONFIG_RANDOM32_SELFTEST
+-static void __init prandom_state_selftest(void);
+-#else
+-static inline void prandom_state_selftest(void)
+-{
+-}
+-#endif
+-
+-DEFINE_PER_CPU(struct rnd_state, net_rand_state);
+-
+ /**
+ * prandom_u32_state - seeded pseudo-random number generator.
+ * @state: pointer to state structure holding seeded state.
+@@ -68,25 +58,6 @@ u32 prandom_u32_state(struct rnd_state *state)
+ }
+ EXPORT_SYMBOL(prandom_u32_state);
+
+-/**
+- * prandom_u32 - pseudo random number generator
+- *
+- * A 32 bit pseudo-random number is generated using a fast
+- * algorithm suitable for simulation. This algorithm is NOT
+- * considered safe for cryptographic use.
+- */
+-u32 prandom_u32(void)
+-{
+- struct rnd_state *state = &get_cpu_var(net_rand_state);
+- u32 res;
+-
+- res = prandom_u32_state(state);
+- put_cpu_var(state);
+-
+- return res;
+-}
+-EXPORT_SYMBOL(prandom_u32);
+-
+ /**
+ * prandom_bytes_state - get the requested number of pseudo-random bytes
+ *
+@@ -118,20 +89,6 @@ void prandom_bytes_state(struct rnd_state *state, void *buf, size_t bytes)
+ }
+ EXPORT_SYMBOL(prandom_bytes_state);
+
+-/**
+- * prandom_bytes - get the requested number of pseudo-random bytes
+- * @buf: where to copy the pseudo-random bytes to
+- * @bytes: the requested number of bytes
+- */
+-void prandom_bytes(void *buf, size_t bytes)
+-{
+- struct rnd_state *state = &get_cpu_var(net_rand_state);
+-
+- prandom_bytes_state(state, buf, bytes);
+- put_cpu_var(state);
+-}
+-EXPORT_SYMBOL(prandom_bytes);
+-
+ static void prandom_warmup(struct rnd_state *state)
+ {
+ /* Calling RNG ten times to satisfy recurrence condition */
+@@ -147,97 +104,6 @@ static void prandom_warmup(struct rnd_state *state)
+ prandom_u32_state(state);
+ }
+
+-static u32 __extract_hwseed(void)
+-{
+- unsigned int val = 0;
+-
+- (void)(arch_get_random_seed_int(&val) ||
+- arch_get_random_int(&val));
+-
+- return val;
+-}
+-
+-static void prandom_seed_early(struct rnd_state *state, u32 seed,
+- bool mix_with_hwseed)
+-{
+-#define LCG(x) ((x) * 69069U) /* super-duper LCG */
+-#define HWSEED() (mix_with_hwseed ? __extract_hwseed() : 0)
+- state->s1 = __seed(HWSEED() ^ LCG(seed), 2U);
+- state->s2 = __seed(HWSEED() ^ LCG(state->s1), 8U);
+- state->s3 = __seed(HWSEED() ^ LCG(state->s2), 16U);
+- state->s4 = __seed(HWSEED() ^ LCG(state->s3), 128U);
+-}
+-
+-/**
+- * prandom_seed - add entropy to pseudo random number generator
+- * @seed: seed value
+- *
+- * Add some additional seeding to the prandom pool.
+- */
+-void prandom_seed(u32 entropy)
+-{
+- int i;
+- /*
+- * No locking on the CPUs, but then somewhat random results are, well,
+- * expected.
+- */
+- for_each_possible_cpu(i) {
+- struct rnd_state *state = &per_cpu(net_rand_state, i);
+-
+- state->s1 = __seed(state->s1 ^ entropy, 2U);
+- prandom_warmup(state);
+- }
+-}
+-EXPORT_SYMBOL(prandom_seed);
+-
+-/*
+- * Generate some initially weak seeding values to allow
+- * to start the prandom_u32() engine.
+- */
+-static int __init prandom_init(void)
+-{
+- int i;
+-
+- prandom_state_selftest();
+-
+- for_each_possible_cpu(i) {
+- struct rnd_state *state = &per_cpu(net_rand_state, i);
+- u32 weak_seed = (i + jiffies) ^ random_get_entropy();
+-
+- prandom_seed_early(state, weak_seed, true);
+- prandom_warmup(state);
+- }
+-
+- return 0;
+-}
+-core_initcall(prandom_init);
+-
+-static void __prandom_timer(unsigned long dontcare);
+-
+-static DEFINE_TIMER(seed_timer, __prandom_timer, 0, 0);
+-
+-static void __prandom_timer(unsigned long dontcare)
+-{
+- u32 entropy;
+- unsigned long expires;
+-
+- get_random_bytes(&entropy, sizeof(entropy));
+- prandom_seed(entropy);
+-
+- /* reseed every ~60 seconds, in [40 .. 80) interval with slack */
+- expires = 40 + prandom_u32_max(40);
+- seed_timer.expires = jiffies + msecs_to_jiffies(expires * MSEC_PER_SEC);
+-
+- add_timer(&seed_timer);
+-}
+-
+-static void __init __prandom_start_seed_timer(void)
+-{
+- set_timer_slack(&seed_timer, HZ);
+- seed_timer.expires = jiffies + msecs_to_jiffies(40 * MSEC_PER_SEC);
+- add_timer(&seed_timer);
+-}
+-
+ void prandom_seed_full_state(struct rnd_state __percpu *pcpu_state)
+ {
+ int i;
+@@ -256,51 +122,6 @@ void prandom_seed_full_state(struct rnd_state __percpu *pcpu_state)
+ }
+ }
+
+-/*
+- * Generate better values after random number generator
+- * is fully initialized.
+- */
+-static void __prandom_reseed(bool late)
+-{
+- unsigned long flags;
+- static bool latch = false;
+- static DEFINE_SPINLOCK(lock);
+-
+- /* Asking for random bytes might result in bytes getting
+- * moved into the nonblocking pool and thus marking it
+- * as initialized. In this case we would double back into
+- * this function and attempt to do a late reseed.
+- * Ignore the pointless attempt to reseed again if we're
+- * already waiting for bytes when the nonblocking pool
+- * got initialized.
+- */
+-
+- /* only allow initial seeding (late == false) once */
+- if (!spin_trylock_irqsave(&lock, flags))
+- return;
+-
+- if (latch && !late)
+- goto out;
+-
+- latch = true;
+- prandom_seed_full_state(&net_rand_state);
+-out:
+- spin_unlock_irqrestore(&lock, flags);
+-}
+-
+-void prandom_reseed_late(void)
+-{
+- __prandom_reseed(true);
+-}
+-
+-static int __init prandom_reseed(void)
+-{
+- __prandom_reseed(false);
+- __prandom_start_seed_timer();
+- return 0;
+-}
+-late_initcall(prandom_reseed);
+-
+ #ifdef CONFIG_RANDOM32_SELFTEST
+ static struct prandom_test1 {
+ u32 seed;
+@@ -420,7 +241,28 @@ static struct prandom_test2 {
+ { 407983964U, 921U, 728767059U },
+ };
+
+-static void __init prandom_state_selftest(void)
++static u32 __extract_hwseed(void)
++{
++ unsigned int val = 0;
++
++ (void)(arch_get_random_seed_int(&val) ||
++ arch_get_random_int(&val));
++
++ return val;
++}
++
++static void prandom_seed_early(struct rnd_state *state, u32 seed,
++ bool mix_with_hwseed)
++{
++#define LCG(x) ((x) * 69069U) /* super-duper LCG */
++#define HWSEED() (mix_with_hwseed ? __extract_hwseed() : 0)
++ state->s1 = __seed(HWSEED() ^ LCG(seed), 2U);
++ state->s2 = __seed(HWSEED() ^ LCG(state->s1), 8U);
++ state->s3 = __seed(HWSEED() ^ LCG(state->s2), 16U);
++ state->s4 = __seed(HWSEED() ^ LCG(state->s3), 128U);
++}
++
++static int __init prandom_state_selftest(void)
+ {
+ int i, j, errors = 0, runs = 0;
+ bool error = false;
+@@ -460,5 +302,266 @@ static void __init prandom_state_selftest(void)
+ pr_warn("prandom: %d/%d self tests failed\n", errors, runs);
+ else
+ pr_info("prandom: %d self tests passed\n", runs);
++ return 0;
+ }
++core_initcall(prandom_state_selftest);
+ #endif
++
++/*
++ * The prandom_u32() implementation is now completely separate from the
++ * prandom_state() functions, which are retained (for now) for compatibility.
++ *
++ * Because of (ab)use in the networking code for choosing random TCP/UDP port
++ * numbers, which open DoS possibilities if guessable, we want something
++ * stronger than a standard PRNG. But the performance requirements of
++ * the network code do not allow robust crypto for this application.
++ *
++ * So this is a homebrew Junior Spaceman implementation, based on the
++ * lowest-latency trustworthy crypto primitive available, SipHash.
++ * (The authors of SipHash have not been consulted about this abuse of
++ * their work.)
++ *
++ * Standard SipHash-2-4 uses 2n+4 rounds to hash n words of input to
++ * one word of output. This abbreviated version uses 2 rounds per word
++ * of output.
++ */
++
++struct siprand_state {
++ unsigned long v0;
++ unsigned long v1;
++ unsigned long v2;
++ unsigned long v3;
++};
++
++static DEFINE_PER_CPU(struct siprand_state, net_rand_state);
++
++/*
++ * This is the core CPRNG function. As "pseudorandom", this is not used
++ * for truly valuable things, just intended to be a PITA to guess.
++ * For maximum speed, we do just two SipHash rounds per word. This is
++ * the same rate as 4 rounds per 64 bits that SipHash normally uses,
++ * so hopefully it's reasonably secure.
++ *
++ * There are two changes from the official SipHash finalization:
++ * - We omit some constants XORed with v2 in the SipHash spec as irrelevant;
++ * they are there only to make the output rounds distinct from the input
++ * rounds, and this application has no input rounds.
++ * - Rather than returning v0^v1^v2^v3, return v1+v3.
++ * If you look at the SipHash round, the last operation on v3 is
++ * "v3 ^= v0", so "v0 ^ v3" just undoes that, a waste of time.
++ * Likewise "v1 ^= v2". (The rotate of v2 makes a difference, but
++ * it still cancels out half of the bits in v2 for no benefit.)
++ * Second, since the last combining operation was xor, continue the
++ * pattern of alternating xor/add for a tiny bit of extra non-linearity.
++ */
++static inline u32 siprand_u32(struct siprand_state *s)
++{
++ unsigned long v0 = s->v0, v1 = s->v1, v2 = s->v2, v3 = s->v3;
++
++ PRND_SIPROUND(v0, v1, v2, v3);
++ PRND_SIPROUND(v0, v1, v2, v3);
++ s->v0 = v0; s->v1 = v1; s->v2 = v2; s->v3 = v3;
++ return v1 + v3;
++}
++
++
++/**
++ * prandom_u32 - pseudo random number generator
++ *
++ * A 32 bit pseudo-random number is generated using a fast
++ * algorithm suitable for simulation. This algorithm is NOT
++ * considered safe for cryptographic use.
++ */
++u32 prandom_u32(void)
++{
++ struct siprand_state *state = get_cpu_ptr(&net_rand_state);
++ u32 res = siprand_u32(state);
++
++ put_cpu_ptr(&net_rand_state);
++ return res;
++}
++EXPORT_SYMBOL(prandom_u32);
++
++/**
++ * prandom_bytes - get the requested number of pseudo-random bytes
++ * @buf: where to copy the pseudo-random bytes to
++ * @bytes: the requested number of bytes
++ */
++void prandom_bytes(void *buf, size_t bytes)
++{
++ struct siprand_state *state = get_cpu_ptr(&net_rand_state);
++ u8 *ptr = buf;
++
++ while (bytes >= sizeof(u32)) {
++ put_unaligned(siprand_u32(state), (u32 *)ptr);
++ ptr += sizeof(u32);
++ bytes -= sizeof(u32);
++ }
++
++ if (bytes > 0) {
++ u32 rem = siprand_u32(state);
++
++ do {
++ *ptr++ = (u8)rem;
++ rem >>= BITS_PER_BYTE;
++ } while (--bytes > 0);
++ }
++ put_cpu_ptr(&net_rand_state);
++}
++EXPORT_SYMBOL(prandom_bytes);
++
++/**
++ * prandom_seed - add entropy to pseudo random number generator
++ * @entropy: entropy value
++ *
++ * Add some additional seed material to the prandom pool.
++ * The "entropy" is actually our IP address (the only caller is
++ * the network code), not for unpredictability, but to ensure that
++ * different machines are initialized differently.
++ */
++void prandom_seed(u32 entropy)
++{
++ int i;
++
++ add_device_randomness(&entropy, sizeof(entropy));
++
++ for_each_possible_cpu(i) {
++ struct siprand_state *state = per_cpu_ptr(&net_rand_state, i);
++ unsigned long v0 = state->v0, v1 = state->v1;
++ unsigned long v2 = state->v2, v3 = state->v3;
++
++ do {
++ v3 ^= entropy;
++ PRND_SIPROUND(v0, v1, v2, v3);
++ PRND_SIPROUND(v0, v1, v2, v3);
++ v0 ^= entropy;
++ } while (unlikely(!v0 || !v1 || !v2 || !v3));
++
++ WRITE_ONCE(state->v0, v0);
++ WRITE_ONCE(state->v1, v1);
++ WRITE_ONCE(state->v2, v2);
++ WRITE_ONCE(state->v3, v3);
++ }
++}
++EXPORT_SYMBOL(prandom_seed);
++
++/*
++ * Generate some initially weak seeding values to allow
++ * the prandom_u32() engine to be started.
++ */
++static int __init prandom_init_early(void)
++{
++ int i;
++ unsigned long v0, v1, v2, v3;
++
++ if (!arch_get_random_long(&v0))
++ v0 = jiffies;
++ if (!arch_get_random_long(&v1))
++ v1 = random_get_entropy();
++ v2 = v0 ^ PRND_K0;
++ v3 = v1 ^ PRND_K1;
++
++ for_each_possible_cpu(i) {
++ struct siprand_state *state;
++
++ v3 ^= i;
++ PRND_SIPROUND(v0, v1, v2, v3);
++ PRND_SIPROUND(v0, v1, v2, v3);
++ v0 ^= i;
++
++ state = per_cpu_ptr(&net_rand_state, i);
++ state->v0 = v0; state->v1 = v1;
++ state->v2 = v2; state->v3 = v3;
++ }
++
++ return 0;
++}
++core_initcall(prandom_init_early);
++
++
++/* Stronger reseeding when available, and periodically thereafter. */
++static void prandom_reseed(unsigned long dontcare);
++
++static DEFINE_TIMER(seed_timer, prandom_reseed, 0, 0);
++
++static void prandom_reseed(unsigned long dontcare)
++{
++ unsigned long expires;
++ int i;
++
++ /*
++ * Reinitialize each CPU's PRNG with 128 bits of key.
++ * No locking on the CPUs, but then somewhat random results are,
++ * well, expected.
++ */
++ for_each_possible_cpu(i) {
++ struct siprand_state *state;
++ unsigned long v0 = get_random_long(), v2 = v0 ^ PRND_K0;
++ unsigned long v1 = get_random_long(), v3 = v1 ^ PRND_K1;
++#if BITS_PER_LONG == 32
++ int j;
++
++ /*
++ * On 32-bit machines, hash in two extra words to
++ * approximate 128-bit key length. Not that the hash
++ * has that much security, but this prevents a trivial
++ * 64-bit brute force.
++ */
++ for (j = 0; j < 2; j++) {
++ unsigned long m = get_random_long();
++
++ v3 ^= m;
++ PRND_SIPROUND(v0, v1, v2, v3);
++ PRND_SIPROUND(v0, v1, v2, v3);
++ v0 ^= m;
++ }
++#endif
++ /*
++ * Probably impossible in practice, but there is a
++ * theoretical risk that a race between this reseeding
++ * and the target CPU writing its state back could
++ * create the all-zero SipHash fixed point.
++ *
++ * To ensure that never happens, ensure the state
++ * we write contains no zero words.
++ */
++ state = per_cpu_ptr(&net_rand_state, i);
++ WRITE_ONCE(state->v0, v0 ? v0 : -1ul);
++ WRITE_ONCE(state->v1, v1 ? v1 : -1ul);
++ WRITE_ONCE(state->v2, v2 ? v2 : -1ul);
++ WRITE_ONCE(state->v3, v3 ? v3 : -1ul);
++ }
++
++ /* reseed every ~60 seconds, in [40 .. 80) interval with slack */
++ expires = round_jiffies(jiffies + 40 * HZ + prandom_u32_max(40 * HZ));
++ mod_timer(&seed_timer, expires);
++}
++
++/*
++ * The random ready callback can be called from almost any interrupt.
++ * To avoid worrying about whether it's safe to delay that interrupt
++ * long enough to seed all CPUs, just schedule an immediate timer event.
++ */
++static void prandom_timer_start(struct random_ready_callback *unused)
++{
++ mod_timer(&seed_timer, jiffies);
++}
++
++/*
++ * Start periodic full reseeding as soon as strong
++ * random numbers are available.
++ */
++static int __init prandom_init_late(void)
++{
++ static struct random_ready_callback random_ready = {
++ .func = prandom_timer_start
++ };
++ int ret = add_random_ready_callback(&random_ready);
++
++ if (ret == -EALREADY) {
++ prandom_timer_start(&random_ready);
++ ret = 0;
++ }
++ return ret;
++}
++late_initcall(prandom_init_late);
+diff --git a/lib/swiotlb.c b/lib/swiotlb.c
+index 6bc452b33b76f..7ccc45c3fdd7f 100644
+--- a/lib/swiotlb.c
++++ b/lib/swiotlb.c
+@@ -195,6 +195,7 @@ int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose)
+ io_tlb_orig_addr[i] = INVALID_PHYS_ADDR;
+ }
+ io_tlb_index = 0;
++ no_iotlb_memory = false;
+
+ if (verbose)
+ swiotlb_print_info();
+@@ -225,9 +226,11 @@ swiotlb_init(int verbose)
+ if (vstart && !swiotlb_init_with_tbl(vstart, io_tlb_nslabs, verbose))
+ return;
+
+- if (io_tlb_start)
++ if (io_tlb_start) {
+ memblock_free_early(io_tlb_start,
+ PAGE_ALIGN(io_tlb_nslabs << IO_TLB_SHIFT));
++ io_tlb_start = 0;
++ }
+ pr_warn("Cannot allocate buffer");
+ no_iotlb_memory = true;
+ }
+@@ -326,6 +329,7 @@ swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs)
+ io_tlb_orig_addr[i] = INVALID_PHYS_ADDR;
+ }
+ io_tlb_index = 0;
++ no_iotlb_memory = false;
+
+ swiotlb_print_info();
+
+diff --git a/mm/mempolicy.c b/mm/mempolicy.c
+index e101cac3d4a63..9ab7969ee7e30 100644
+--- a/mm/mempolicy.c
++++ b/mm/mempolicy.c
+@@ -490,14 +490,14 @@ static int queue_pages_pte_range(pmd_t *pmd, unsigned long addr,
+ struct queue_pages *qp = walk->private;
+ unsigned long flags = qp->flags;
+ int nid;
+- pte_t *pte;
++ pte_t *pte, *mapped_pte;
+ spinlock_t *ptl;
+
+ split_huge_page_pmd(vma, addr, pmd);
+ if (pmd_trans_unstable(pmd))
+ return 0;
+
+- pte = pte_offset_map_lock(walk->mm, pmd, addr, &ptl);
++ mapped_pte = pte = pte_offset_map_lock(walk->mm, pmd, addr, &ptl);
+ for (; addr != end; pte++, addr += PAGE_SIZE) {
+ if (!pte_present(*pte))
+ continue;
+@@ -521,7 +521,7 @@ static int queue_pages_pte_range(pmd_t *pmd, unsigned long addr,
+ } else
+ break;
+ }
+- pte_unmap_unlock(pte - 1, ptl);
++ pte_unmap_unlock(mapped_pte, ptl);
+ cond_resched();
+ return addr != end ? -EIO : 0;
+ }
+diff --git a/net/ipv4/syncookies.c b/net/ipv4/syncookies.c
+index f3d3ac5c23d59..d9e7d61a0197e 100644
+--- a/net/ipv4/syncookies.c
++++ b/net/ipv4/syncookies.c
+@@ -307,7 +307,7 @@ struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb)
+ __u32 cookie = ntohl(th->ack_seq) - 1;
+ struct sock *ret = sk;
+ struct request_sock *req;
+- int mss;
++ int full_space, mss;
+ struct rtable *rt;
+ __u8 rcv_wscale;
+ struct flowi4 fl4;
+@@ -391,8 +391,13 @@ struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb)
+
+ /* Try to redo what tcp_v4_send_synack did. */
+ req->rsk_window_clamp = tp->window_clamp ? :dst_metric(&rt->dst, RTAX_WINDOW);
++ /* limit the window selection if the user enforce a smaller rx buffer */
++ full_space = tcp_full_space(sk);
++ if (sk->sk_userlocks & SOCK_RCVBUF_LOCK &&
++ (req->rsk_window_clamp > full_space || req->rsk_window_clamp == 0))
++ req->rsk_window_clamp = full_space;
+
+- tcp_select_initial_window(tcp_full_space(sk), req->mss,
++ tcp_select_initial_window(full_space, req->mss,
+ &req->rsk_rcv_wnd, &req->rsk_window_clamp,
+ ireq->wscale_ok, &rcv_wscale,
+ dst_metric(&rt->dst, RTAX_INITRWND));
+diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
+index 5039486c4f86b..8bab7e64ffcfb 100644
+--- a/net/ipv6/sit.c
++++ b/net/ipv6/sit.c
+@@ -1079,7 +1079,6 @@ static void ipip6_tunnel_bind_dev(struct net_device *dev)
+ if (tdev && !netif_is_l3_master(tdev)) {
+ int t_hlen = tunnel->hlen + sizeof(struct iphdr);
+
+- dev->hard_header_len = tdev->hard_header_len + sizeof(struct iphdr);
+ dev->mtu = tdev->mtu - t_hlen;
+ if (dev->mtu < IPV6_MIN_MTU)
+ dev->mtu = IPV6_MIN_MTU;
+@@ -1371,7 +1370,6 @@ static void ipip6_tunnel_setup(struct net_device *dev)
+ dev->destructor = ipip6_dev_free;
+
+ dev->type = ARPHRD_SIT;
+- dev->hard_header_len = LL_MAX_HEADER + t_hlen;
+ dev->mtu = ETH_DATA_LEN - t_hlen;
+ dev->flags = IFF_NOARP;
+ netif_keep_dst(dev);
+diff --git a/net/ipv6/syncookies.c b/net/ipv6/syncookies.c
+index fb3ba2a511196..d2792580b1124 100644
+--- a/net/ipv6/syncookies.c
++++ b/net/ipv6/syncookies.c
+@@ -144,7 +144,7 @@ struct sock *cookie_v6_check(struct sock *sk, struct sk_buff *skb)
+ __u32 cookie = ntohl(th->ack_seq) - 1;
+ struct sock *ret = sk;
+ struct request_sock *req;
+- int mss;
++ int full_space, mss;
+ struct dst_entry *dst;
+ __u8 rcv_wscale;
+
+@@ -237,7 +237,13 @@ struct sock *cookie_v6_check(struct sock *sk, struct sk_buff *skb)
+ }
+
+ req->rsk_window_clamp = tp->window_clamp ? :dst_metric(dst, RTAX_WINDOW);
+- tcp_select_initial_window(tcp_full_space(sk), req->mss,
++ /* limit the window selection if the user enforce a smaller rx buffer */
++ full_space = tcp_full_space(sk);
++ if (sk->sk_userlocks & SOCK_RCVBUF_LOCK &&
++ (req->rsk_window_clamp > full_space || req->rsk_window_clamp == 0))
++ req->rsk_window_clamp = full_space;
++
++ tcp_select_initial_window(full_space, req->mss,
+ &req->rsk_rcv_wnd, &req->rsk_window_clamp,
+ ireq->wscale_ok, &rcv_wscale,
+ dst_metric(dst, RTAX_INITRWND));
+diff --git a/net/iucv/af_iucv.c b/net/iucv/af_iucv.c
+index 3edffb7bf2a46..f94107e27b5ed 100644
+--- a/net/iucv/af_iucv.c
++++ b/net/iucv/af_iucv.c
+@@ -1513,7 +1513,8 @@ static int iucv_sock_shutdown(struct socket *sock, int how)
+ break;
+ }
+
+- if (how == SEND_SHUTDOWN || how == SHUTDOWN_MASK) {
++ if ((how == SEND_SHUTDOWN || how == SHUTDOWN_MASK) &&
++ sk->sk_state == IUCV_CONNECTED) {
+ if (iucv->transport == AF_IUCV_TRANS_IUCV) {
+ txmsg.class = 0;
+ txmsg.tag = 0;
+diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
+index 98c34c3adf392..4466413c5eecc 100644
+--- a/net/mac80211/tx.c
++++ b/net/mac80211/tx.c
+@@ -1594,19 +1594,24 @@ static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata,
+
+ /* device xmit handlers */
+
++enum ieee80211_encrypt {
++ ENCRYPT_NO,
++ ENCRYPT_MGMT,
++ ENCRYPT_DATA,
++};
++
+ static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata,
+ struct sk_buff *skb,
+- int head_need, bool may_encrypt)
++ int head_need,
++ enum ieee80211_encrypt encrypt)
+ {
+ struct ieee80211_local *local = sdata->local;
+- struct ieee80211_hdr *hdr;
+ bool enc_tailroom;
+ int tail_need = 0;
+
+- hdr = (struct ieee80211_hdr *) skb->data;
+- enc_tailroom = may_encrypt &&
+- (sdata->crypto_tx_tailroom_needed_cnt ||
+- ieee80211_is_mgmt(hdr->frame_control));
++ enc_tailroom = encrypt == ENCRYPT_MGMT ||
++ (encrypt == ENCRYPT_DATA &&
++ sdata->crypto_tx_tailroom_needed_cnt);
+
+ if (enc_tailroom) {
+ tail_need = IEEE80211_ENCRYPT_TAILROOM;
+@@ -1639,21 +1644,27 @@ void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+ int headroom;
+- bool may_encrypt;
++ enum ieee80211_encrypt encrypt;
+
+- may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT);
++ if (info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)
++ encrypt = ENCRYPT_NO;
++ else if (ieee80211_is_mgmt(hdr->frame_control))
++ encrypt = ENCRYPT_MGMT;
++ else
++ encrypt = ENCRYPT_DATA;
+
+ headroom = local->tx_headroom;
+- if (may_encrypt)
++ if (encrypt != ENCRYPT_NO)
+ headroom += sdata->encrypt_headroom;
+ headroom -= skb_headroom(skb);
+ headroom = max_t(int, 0, headroom);
+
+- if (ieee80211_skb_resize(sdata, skb, headroom, may_encrypt)) {
++ if (ieee80211_skb_resize(sdata, skb, headroom, encrypt)) {
+ ieee80211_free_txskb(&local->hw, skb);
+ return;
+ }
+
++ /* reload after potential resize */
+ hdr = (struct ieee80211_hdr *) skb->data;
+ info->control.vif = &sdata->vif;
+
+@@ -2346,7 +2357,7 @@ static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata,
+ head_need += sdata->encrypt_headroom;
+ head_need += local->tx_headroom;
+ head_need = max_t(int, 0, head_need);
+- if (ieee80211_skb_resize(sdata, skb, head_need, true)) {
++ if (ieee80211_skb_resize(sdata, skb, head_need, ENCRYPT_DATA)) {
+ ieee80211_free_txskb(&local->hw, skb);
+ skb = NULL;
+ return ERR_PTR(-ENOMEM);
+@@ -2756,7 +2767,7 @@ static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata,
+ if (unlikely(ieee80211_skb_resize(sdata, skb,
+ max_t(int, extra_head + hw_headroom -
+ skb_headroom(skb), 0),
+- false))) {
++ ENCRYPT_NO))) {
+ kfree_skb(skb);
+ return true;
+ }
+diff --git a/net/wireless/reg.c b/net/wireless/reg.c
+index 474923175b108..dcbf5cd44bb37 100644
+--- a/net/wireless/reg.c
++++ b/net/wireless/reg.c
+@@ -2775,7 +2775,7 @@ static void print_rd_rules(const struct ieee80211_regdomain *rd)
+ power_rule = ®_rule->power_rule;
+
+ if (reg_rule->flags & NL80211_RRF_AUTO_BW)
+- snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO",
++ snprintf(bw, sizeof(bw), "%d KHz, %u KHz AUTO",
+ freq_range->max_bandwidth_khz,
+ reg_get_max_bandwidth(rd, reg_rule));
+ else
+diff --git a/net/x25/af_x25.c b/net/x25/af_x25.c
+index f9fb8613fb287..e39bb38eedf30 100644
+--- a/net/x25/af_x25.c
++++ b/net/x25/af_x25.c
+@@ -823,7 +823,7 @@ static int x25_connect(struct socket *sock, struct sockaddr *uaddr,
+ sock->state = SS_CONNECTED;
+ rc = 0;
+ out_put_neigh:
+- if (rc) {
++ if (rc && x25->neighbour) {
+ read_lock_bh(&x25_list_lock);
+ x25_neigh_put(x25->neighbour);
+ x25->neighbour = NULL;
+diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
+index 5bb5950d6276b..ed05cd7a4ef2c 100644
+--- a/net/xfrm/xfrm_state.c
++++ b/net/xfrm/xfrm_state.c
+@@ -1554,6 +1554,7 @@ int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high)
+ int err = -ENOENT;
+ __be32 minspi = htonl(low);
+ __be32 maxspi = htonl(high);
++ __be32 newspi = 0;
+ u32 mark = x->mark.v & x->mark.m;
+
+ spin_lock_bh(&x->lock);
+@@ -1572,21 +1573,22 @@ int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high)
+ xfrm_state_put(x0);
+ goto unlock;
+ }
+- x->id.spi = minspi;
++ newspi = minspi;
+ } else {
+ u32 spi = 0;
+ for (h = 0; h < high-low+1; h++) {
+ spi = low + prandom_u32()%(high-low+1);
+ x0 = xfrm_state_lookup(net, mark, &x->id.daddr, htonl(spi), x->id.proto, x->props.family);
+ if (x0 == NULL) {
+- x->id.spi = htonl(spi);
++ newspi = htonl(spi);
+ break;
+ }
+ xfrm_state_put(x0);
+ }
+ }
+- if (x->id.spi) {
++ if (newspi) {
+ spin_lock_bh(&net->xfrm.xfrm_state_lock);
++ x->id.spi = newspi;
+ h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family);
+ hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
+ spin_unlock_bh(&net->xfrm.xfrm_state_lock);
+diff --git a/sound/hda/ext/hdac_ext_controller.c b/sound/hda/ext/hdac_ext_controller.c
+index 63215b17247c8..379250dd0668e 100644
+--- a/sound/hda/ext/hdac_ext_controller.c
++++ b/sound/hda/ext/hdac_ext_controller.c
+@@ -221,6 +221,8 @@ struct hdac_ext_link *snd_hdac_ext_bus_get_link(struct hdac_ext_bus *ebus,
+ return NULL;
+ if (ebus->idx != bus_idx)
+ return NULL;
++ if (addr < 0 || addr > 31)
++ return NULL;
+
+ list_for_each_entry(hlink, &ebus->hlink_list, list) {
+ for (i = 0; i < HDA_MAX_CODECS; i++) {
+diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
+index 0ae4f73dc8eb5..5b392662d100b 100644
+--- a/tools/perf/util/session.c
++++ b/tools/perf/util/session.c
+@@ -415,6 +415,7 @@ static void perf_event__mmap2_swap(union perf_event *event,
+ event->mmap2.maj = bswap_32(event->mmap2.maj);
+ event->mmap2.min = bswap_32(event->mmap2.min);
+ event->mmap2.ino = bswap_64(event->mmap2.ino);
++ event->mmap2.ino_generation = bswap_64(event->mmap2.ino_generation);
+
+ if (sample_id_all) {
+ void *data = &event->mmap2.filename;
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