Re: Linux 4.9.219

From: Greg KH
Date: Mon Apr 13 2020 - 10:18:42 EST

diff --git a/Makefile b/Makefile
index 1a491b3afc0c..26ad7b28a193 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
VERSION = 4
PATCHLEVEL = 9
-SUBLEVEL = 218
+SUBLEVEL = 219
EXTRAVERSION =
NAME = Roaring Lionus

diff --git a/arch/arm64/kernel/head.S b/arch/arm64/kernel/head.S
index 3b10b9395960..aba534959377 100644
--- a/arch/arm64/kernel/head.S
+++ b/arch/arm64/kernel/head.S
@@ -650,7 +650,7 @@ ENTRY(__boot_cpu_mode)
* with MMU turned off.
*/
ENTRY(__early_cpu_boot_status)
- .long 0
+ .quad 0

.popsection

diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c
index 4bc701b32ce2..89bb6250633d 100644
--- a/block/blk-mq-tag.c
+++ b/block/blk-mq-tag.c
@@ -336,6 +336,13 @@ void blk_mq_queue_tag_busy_iter(struct request_queue *q, busy_iter_fn *fn,
struct blk_mq_hw_ctx *hctx;
int i;

+ /*
+ * __blk_mq_update_nr_hw_queues will update the nr_hw_queues and
+ * queue_hw_ctx after freeze the queue, so we use q_usage_counter
+ * to avoid race with it.
+ */
+ if (!percpu_ref_tryget(&q->q_usage_counter))
+ return;

queue_for_each_hw_ctx(q, hctx, i) {
struct blk_mq_tags *tags = hctx->tags;
@@ -351,7 +358,7 @@ void blk_mq_queue_tag_busy_iter(struct request_queue *q, busy_iter_fn *fn,
bt_for_each(hctx, &tags->breserved_tags, fn, priv, true);
bt_for_each(hctx, &tags->bitmap_tags, fn, priv, false);
}
-
+ blk_queue_exit(q);
}

static unsigned int bt_unused_tags(const struct sbitmap_queue *bt)
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 24fc09cf7f17..58be2eaa5aaa 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -2346,6 +2346,10 @@ void blk_mq_update_nr_hw_queues(struct blk_mq_tag_set *set, int nr_hw_queues)

list_for_each_entry(q, &set->tag_list, tag_set_list)
blk_mq_unfreeze_queue(q);
+ /*
+ * Sync with blk_mq_queue_tag_busy_iter.
+ */
+ synchronize_rcu();
}
EXPORT_SYMBOL_GPL(blk_mq_update_nr_hw_queues);

diff --git a/drivers/char/random.c b/drivers/char/random.c
index 81b65d0e7563..4cbc73173701 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -2118,8 +2118,8 @@ struct batched_entropy {

/*
* Get a random word for internal kernel use only. The quality of the random
- * number is either as good as RDRAND or as good as /dev/urandom, with the
- * goal of being quite fast and not depleting entropy.
+ * number is good as /dev/urandom, but there is no backtrack protection, with
+ * the goal of being quite fast and not depleting entropy.
*/
static DEFINE_PER_CPU(struct batched_entropy, batched_entropy_long);
unsigned long get_random_long(void)
@@ -2127,9 +2127,6 @@ unsigned long get_random_long(void)
unsigned long ret;
struct batched_entropy *batch;

- if (arch_get_random_long(&ret))
- return ret;
-
batch = &get_cpu_var(batched_entropy_long);
if (batch->position % ARRAY_SIZE(batch->entropy_long) == 0) {
extract_crng((u8 *)batch->entropy_long);
@@ -2153,9 +2150,6 @@ unsigned int get_random_int(void)
unsigned int ret;
struct batched_entropy *batch;

- if (arch_get_random_int(&ret))
- return ret;
-
batch = &get_cpu_var(batched_entropy_int);
if (batch->position % ARRAY_SIZE(batch->entropy_int) == 0) {
extract_crng((u8 *)batch->entropy_int);
diff --git a/drivers/clk/qcom/clk-rcg2.c b/drivers/clk/qcom/clk-rcg2.c
index d8601b138dc1..29abb600d7e1 100644
--- a/drivers/clk/qcom/clk-rcg2.c
+++ b/drivers/clk/qcom/clk-rcg2.c
@@ -107,7 +107,7 @@ static int update_config(struct clk_rcg2 *rcg)
}

WARN(1, "%s: rcg didn't update its configuration.", name);
- return 0;
+ return -EBUSY;
}

static int clk_rcg2_set_parent(struct clk_hw *hw, u8 index)
diff --git a/drivers/gpu/drm/bochs/bochs_hw.c b/drivers/gpu/drm/bochs/bochs_hw.c
index a39b0343c197..401c218567af 100644
--- a/drivers/gpu/drm/bochs/bochs_hw.c
+++ b/drivers/gpu/drm/bochs/bochs_hw.c
@@ -97,10 +97,8 @@ int bochs_hw_init(struct drm_device *dev, uint32_t flags)
size = min(size, mem);
}

- if (pci_request_region(pdev, 0, "bochs-drm") != 0) {
- DRM_ERROR("Cannot request framebuffer\n");
- return -EBUSY;
- }
+ if (pci_request_region(pdev, 0, "bochs-drm") != 0)
+ DRM_WARN("Cannot request framebuffer, boot fb still active?\n");

bochs->fb_map = ioremap(addr, size);
if (bochs->fb_map == NULL) {
diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
index e05dda92398c..592ebcd440b6 100644
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -431,6 +431,7 @@ static bool drm_dp_sideband_parse_remote_dpcd_read(struct drm_dp_sideband_msg_rx
if (idx > raw->curlen)
goto fail_len;
repmsg->u.remote_dpcd_read_ack.num_bytes = raw->msg[idx];
+ idx++;
if (idx > raw->curlen)
goto fail_len;

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_buffer.c b/drivers/gpu/drm/etnaviv/etnaviv_buffer.c
index d9230132dfbc..d71fa2d9a196 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_buffer.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_buffer.c
@@ -257,6 +257,8 @@ void etnaviv_buffer_queue(struct etnaviv_gpu *gpu, unsigned int event,
unsigned int waitlink_offset = buffer->user_size - 16;
u32 return_target, return_dwords;
u32 link_target, link_dwords;
+ unsigned int new_flush_seq = READ_ONCE(gpu->mmu->flush_seq);
+ bool need_flush = gpu->flush_seq != new_flush_seq;

if (drm_debug & DRM_UT_DRIVER)
etnaviv_buffer_dump(gpu, buffer, 0, 0x50);
@@ -269,14 +271,14 @@ void etnaviv_buffer_queue(struct etnaviv_gpu *gpu, unsigned int event,
* need to append a mmu flush load state, followed by a new
* link to this buffer - a total of four additional words.
*/
- if (gpu->mmu->need_flush || gpu->switch_context) {
+ if (need_flush || gpu->switch_context) {
u32 target, extra_dwords;

/* link command */
extra_dwords = 1;

/* flush command */
- if (gpu->mmu->need_flush) {
+ if (need_flush) {
if (gpu->mmu->version == ETNAVIV_IOMMU_V1)
extra_dwords += 1;
else
@@ -289,7 +291,7 @@ void etnaviv_buffer_queue(struct etnaviv_gpu *gpu, unsigned int event,

target = etnaviv_buffer_reserve(gpu, buffer, extra_dwords);

- if (gpu->mmu->need_flush) {
+ if (need_flush) {
/* Add the MMU flush */
if (gpu->mmu->version == ETNAVIV_IOMMU_V1) {
CMD_LOAD_STATE(buffer, VIVS_GL_FLUSH_MMU,
@@ -309,7 +311,7 @@ void etnaviv_buffer_queue(struct etnaviv_gpu *gpu, unsigned int event,
SYNC_RECIPIENT_PE);
}

- gpu->mmu->need_flush = false;
+ gpu->flush_seq = new_flush_seq;
}

if (gpu->switch_context) {
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
index a336754698f8..dba0d769d17a 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
@@ -1313,7 +1313,7 @@ int etnaviv_gpu_submit(struct etnaviv_gpu *gpu,
gpu->active_fence = submit->fence;

if (gpu->lastctx != cmdbuf->ctx) {
- gpu->mmu->need_flush = true;
+ gpu->mmu->flush_seq++;
gpu->switch_context = true;
gpu->lastctx = cmdbuf->ctx;
}
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.h b/drivers/gpu/drm/etnaviv/etnaviv_gpu.h
index 73c278dc3706..416940b254a6 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.h
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.h
@@ -135,6 +135,7 @@ struct etnaviv_gpu {
int irq;

struct etnaviv_iommu *mmu;
+ unsigned int flush_seq;

/* Power Control: */
struct clk *clk_bus;
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_mmu.c b/drivers/gpu/drm/etnaviv/etnaviv_mmu.c
index fe0e85b41310..ef9df6158dc1 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_mmu.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_mmu.c
@@ -134,7 +134,7 @@ static int etnaviv_iommu_find_iova(struct etnaviv_iommu *mmu,
*/
if (mmu->last_iova) {
mmu->last_iova = 0;
- mmu->need_flush = true;
+ mmu->flush_seq++;
continue;
}

@@ -197,7 +197,7 @@ static int etnaviv_iommu_find_iova(struct etnaviv_iommu *mmu,
* associated commit requesting this mapping, and retry the
* allocation one more time.
*/
- mmu->need_flush = true;
+ mmu->flush_seq++;
}

return ret;
@@ -354,7 +354,7 @@ u32 etnaviv_iommu_get_cmdbuf_va(struct etnaviv_gpu *gpu,
* that the FE MMU prefetch won't load invalid entries.
*/
mmu->last_iova = buf->vram_node.start + buf->size + SZ_64K;
- gpu->mmu->need_flush = true;
+ mmu->flush_seq++;
mutex_unlock(&mmu->lock);

return (u32)buf->vram_node.start;
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_mmu.h b/drivers/gpu/drm/etnaviv/etnaviv_mmu.h
index e787e49c9693..5bdc5f5601b1 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_mmu.h
+++ b/drivers/gpu/drm/etnaviv/etnaviv_mmu.h
@@ -44,7 +44,7 @@ struct etnaviv_iommu {
struct list_head mappings;
struct drm_mm mm;
u32 last_iova;
- bool need_flush;
+ unsigned int flush_seq;
};

struct etnaviv_gem_object;
diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
index 795660e29b2c..569e8c45a59a 100644
--- a/drivers/gpu/drm/msm/msm_gem.c
+++ b/drivers/gpu/drm/msm/msm_gem.c
@@ -40,6 +40,46 @@ static bool use_pages(struct drm_gem_object *obj)
return !msm_obj->vram_node;
}

+/*
+ * Cache sync.. this is a bit over-complicated, to fit dma-mapping
+ * API. Really GPU cache is out of scope here (handled on cmdstream)
+ * and all we need to do is invalidate newly allocated pages before
+ * mapping to CPU as uncached/writecombine.
+ *
+ * On top of this, we have the added headache, that depending on
+ * display generation, the display's iommu may be wired up to either
+ * the toplevel drm device (mdss), or to the mdp sub-node, meaning
+ * that here we either have dma-direct or iommu ops.
+ *
+ * Let this be a cautionary tail of abstraction gone wrong.
+ */
+
+static void sync_for_device(struct msm_gem_object *msm_obj)
+{
+ struct device *dev = msm_obj->base.dev->dev;
+
+ if (get_dma_ops(dev)) {
+ dma_sync_sg_for_device(dev, msm_obj->sgt->sgl,
+ msm_obj->sgt->nents, DMA_BIDIRECTIONAL);
+ } else {
+ dma_map_sg(dev, msm_obj->sgt->sgl,
+ msm_obj->sgt->nents, DMA_BIDIRECTIONAL);
+ }
+}
+
+static void sync_for_cpu(struct msm_gem_object *msm_obj)
+{
+ struct device *dev = msm_obj->base.dev->dev;
+
+ if (get_dma_ops(dev)) {
+ dma_sync_sg_for_cpu(dev, msm_obj->sgt->sgl,
+ msm_obj->sgt->nents, DMA_BIDIRECTIONAL);
+ } else {
+ dma_unmap_sg(dev, msm_obj->sgt->sgl,
+ msm_obj->sgt->nents, DMA_BIDIRECTIONAL);
+ }
+}
+
/* allocate pages from VRAM carveout, used when no IOMMU: */
static struct page **get_pages_vram(struct drm_gem_object *obj,
int npages)
@@ -106,8 +146,7 @@ static struct page **get_pages(struct drm_gem_object *obj)
* because display controller, GPU, etc. are not coherent:
*/
if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED))
- dma_map_sg(dev->dev, msm_obj->sgt->sgl,
- msm_obj->sgt->nents, DMA_BIDIRECTIONAL);
+ sync_for_device(msm_obj);
}

return msm_obj->pages;
@@ -124,9 +163,7 @@ static void put_pages(struct drm_gem_object *obj)
* GPU, etc. are not coherent:
*/
if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED))
- dma_unmap_sg(obj->dev->dev, msm_obj->sgt->sgl,
- msm_obj->sgt->nents,
- DMA_BIDIRECTIONAL);
+ sync_for_cpu(msm_obj);

sg_free_table(msm_obj->sgt);
kfree(msm_obj->sgt);
diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
index 27653aad8f21..0a6cc78ebcf7 100644
--- a/drivers/infiniband/core/cma.c
+++ b/drivers/infiniband/core/cma.c
@@ -2568,6 +2568,7 @@ static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
err2:
kfree(route->path_rec);
route->path_rec = NULL;
+ route->num_paths = 0;
err1:
kfree(work);
return ret;
diff --git a/drivers/infiniband/hw/hfi1/sysfs.c b/drivers/infiniband/hw/hfi1/sysfs.c
index 621b60ab74ee..5df1e368096c 100644
--- a/drivers/infiniband/hw/hfi1/sysfs.c
+++ b/drivers/infiniband/hw/hfi1/sysfs.c
@@ -670,7 +670,11 @@ int hfi1_create_port_files(struct ib_device *ibdev, u8 port_num,
dd_dev_err(dd,
"Skipping sc2vl sysfs info, (err %d) port %u\n",
ret, port_num);
- goto bail;
+ /*
+ * Based on the documentation for kobject_init_and_add(), the
+ * caller should call kobject_put even if this call fails.
+ */
+ goto bail_sc2vl;
}
kobject_uevent(&ppd->sc2vl_kobj, KOBJ_ADD);

@@ -680,7 +684,7 @@ int hfi1_create_port_files(struct ib_device *ibdev, u8 port_num,
dd_dev_err(dd,
"Skipping sl2sc sysfs info, (err %d) port %u\n",
ret, port_num);
- goto bail_sc2vl;
+ goto bail_sl2sc;
}
kobject_uevent(&ppd->sl2sc_kobj, KOBJ_ADD);

@@ -690,7 +694,7 @@ int hfi1_create_port_files(struct ib_device *ibdev, u8 port_num,
dd_dev_err(dd,
"Skipping vl2mtu sysfs info, (err %d) port %u\n",
ret, port_num);
- goto bail_sl2sc;
+ goto bail_vl2mtu;
}
kobject_uevent(&ppd->vl2mtu_kobj, KOBJ_ADD);

@@ -700,7 +704,7 @@ int hfi1_create_port_files(struct ib_device *ibdev, u8 port_num,
dd_dev_err(dd,
"Skipping Congestion Control sysfs info, (err %d) port %u\n",
ret, port_num);
- goto bail_vl2mtu;
+ goto bail_cc;
}

kobject_uevent(&ppd->pport_cc_kobj, KOBJ_ADD);
@@ -738,7 +742,6 @@ int hfi1_create_port_files(struct ib_device *ibdev, u8 port_num,
kobject_put(&ppd->sl2sc_kobj);
bail_sc2vl:
kobject_put(&ppd->sc2vl_kobj);
-bail:
return ret;
}

@@ -858,8 +861,13 @@ int hfi1_verbs_register_sysfs(struct hfi1_devdata *dd)
for (i = 0; i < ARRAY_SIZE(hfi1_attributes); ++i)
device_remove_file(&dev->dev, hfi1_attributes[i]);

- for (i = 0; i < dd->num_sdma; i++)
- kobject_del(&dd->per_sdma[i].kobj);
+ /*
+ * The function kobject_put() will call kobject_del() if the kobject
+ * has been added successfully. The sysfs files created under the
+ * kobject directory will also be removed during the process.
+ */
+ for (; i >= 0; i--)
+ kobject_put(&dd->per_sdma[i].kobj);

return ret;
}
@@ -872,6 +880,10 @@ void hfi1_verbs_unregister_sysfs(struct hfi1_devdata *dd)
struct hfi1_pportdata *ppd;
int i;

+ /* Unwind operations in hfi1_verbs_register_sysfs() */
+ for (i = 0; i < dd->num_sdma; i++)
+ kobject_put(&dd->per_sdma[i].kobj);
+
for (i = 0; i < dd->num_pports; i++) {
ppd = &dd->pport[i];

diff --git a/drivers/net/can/slcan.c b/drivers/net/can/slcan.c
index 94b37c60fdd0..d0435c7631ff 100644
--- a/drivers/net/can/slcan.c
+++ b/drivers/net/can/slcan.c
@@ -147,7 +147,7 @@ static void slc_bump(struct slcan *sl)
u32 tmpid;
char *cmd = sl->rbuff;

- cf.can_id = 0;
+ memset(&cf, 0, sizeof(cf));

switch (*cmd) {
case 'r':
@@ -186,8 +186,6 @@ static void slc_bump(struct slcan *sl)
else
return;

- *(u64 *) (&cf.data) = 0; /* clear payload */
-
/* RTR frames may have a dlc > 0 but they never have any data bytes */
if (!(cf.can_id & CAN_RTR_FLAG)) {
for (i = 0; i < cf.can_dlc; i++) {
diff --git a/drivers/net/dsa/bcm_sf2.c b/drivers/net/dsa/bcm_sf2.c
index a3a8d7b62f3f..796571fccba7 100644
--- a/drivers/net/dsa/bcm_sf2.c
+++ b/drivers/net/dsa/bcm_sf2.c
@@ -976,6 +976,7 @@ static int bcm_sf2_sw_probe(struct platform_device *pdev)
struct device_node *dn = pdev->dev.of_node;
struct b53_platform_data *pdata;
struct dsa_switch_ops *ops;
+ struct device_node *ports;
struct bcm_sf2_priv *priv;
struct b53_device *dev;
struct dsa_switch *ds;
@@ -1038,7 +1039,11 @@ static int bcm_sf2_sw_probe(struct platform_device *pdev)
spin_lock_init(&priv->indir_lock);
mutex_init(&priv->stats_mutex);

- bcm_sf2_identify_ports(priv, dn->child);
+ ports = of_find_node_by_name(dn, "ports");
+ if (ports) {
+ bcm_sf2_identify_ports(priv, ports);
+ of_node_put(ports);
+ }

priv->irq0 = irq_of_parse_and_map(dn, 0);
priv->irq1 = irq_of_parse_and_map(dn, 1);
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c b/drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c
index 093e58e94075..3a2edf9f51e2 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c
@@ -214,7 +214,7 @@ static void dwmac1000_set_filter(struct mac_device_info *hw,
reg++;
}

- while (reg <= perfect_addr_number) {
+ while (reg < perfect_addr_number) {
writel(0, ioaddr + GMAC_ADDR_HIGH(reg));
writel(0, ioaddr + GMAC_ADDR_LOW(reg));
reg++;
diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c
index 16f074408813..adb38a4ec9ac 100644
--- a/drivers/net/phy/micrel.c
+++ b/drivers/net/phy/micrel.c
@@ -28,6 +28,7 @@
#include <linux/micrel_phy.h>
#include <linux/of.h>
#include <linux/clk.h>
+#include <linux/delay.h>

/* Operation Mode Strap Override */
#define MII_KSZPHY_OMSO 0x16
@@ -728,6 +729,12 @@ static int kszphy_resume(struct phy_device *phydev)
{
genphy_resume(phydev);

+ /* After switching from power-down to normal mode, an internal global
+ * reset is automatically generated. Wait a minimum of 1 ms before
+ * read/write access to the PHY registers.
+ */
+ usleep_range(1000, 2000);
+
/* Enable PHY Interrupts */
if (phy_interrupt_is_valid(phydev)) {
phydev->interrupts = PHY_INTERRUPT_ENABLED;
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 712bd450f857..bf36eda082d6 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -2996,7 +2996,6 @@ int dwc3_gadget_init(struct dwc3 *dwc)
dwc->gadget.speed = USB_SPEED_UNKNOWN;
dwc->gadget.sg_supported = true;
dwc->gadget.name = "dwc3-gadget";
- dwc->gadget.is_otg = dwc->dr_mode == USB_DR_MODE_OTG;

/*
* FIXME We might be setting max_speed to <SUPER, however versions
diff --git a/fs/ceph/super.c b/fs/ceph/super.c
index c42cbd19ff05..ec1640f3167b 100644
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -85,7 +85,6 @@ static int ceph_statfs(struct dentry *dentry, struct kstatfs *buf)
return 0;
}

-
static int ceph_sync_fs(struct super_block *sb, int wait)
{
struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
@@ -178,6 +177,26 @@ static match_table_t fsopt_tokens = {
{-1, NULL}
};

+/*
+ * Remove adjacent slashes and then the trailing slash, unless it is
+ * the only remaining character.
+ *
+ * E.g. "//dir1////dir2///" --> "/dir1/dir2", "///" --> "/".
+ */
+static void canonicalize_path(char *path)
+{
+ int i, j = 0;
+
+ for (i = 0; path[i] != '\0'; i++) {
+ if (path[i] != '/' || j < 1 || path[j - 1] != '/')
+ path[j++] = path[i];
+ }
+
+ if (j > 1 && path[j - 1] == '/')
+ j--;
+ path[j] = '\0';
+}
+
static int parse_fsopt_token(char *c, void *private)
{
struct ceph_mount_options *fsopt = private;
@@ -337,6 +356,7 @@ static int compare_mount_options(struct ceph_mount_options *new_fsopt,
ret = strcmp_null(fsopt1->snapdir_name, fsopt2->snapdir_name);
if (ret)
return ret;
+
ret = strcmp_null(fsopt1->mds_namespace, fsopt2->mds_namespace);
if (ret)
return ret;
@@ -396,13 +416,17 @@ static int parse_mount_options(struct ceph_mount_options **pfsopt,
*/
dev_name_end = strchr(dev_name, '/');
if (dev_name_end) {
- if (strlen(dev_name_end) > 1) {
- fsopt->server_path = kstrdup(dev_name_end, GFP_KERNEL);
- if (!fsopt->server_path) {
- err = -ENOMEM;
- goto out;
- }
+ /*
+ * The server_path will include the whole chars from userland
+ * including the leading '/'.
+ */
+ fsopt->server_path = kstrdup(dev_name_end, GFP_KERNEL);
+ if (!fsopt->server_path) {
+ err = -ENOMEM;
+ goto out;
}
+
+ canonicalize_path(fsopt->server_path);
} else {
dev_name_end = dev_name + strlen(dev_name);
}
@@ -725,7 +749,6 @@ static void destroy_caches(void)
ceph_fscache_unregister();
}

-
/*
* ceph_umount_begin - initiate forced umount. Tear down down the
* mount, skipping steps that may hang while waiting for server(s).
@@ -812,9 +835,6 @@ static struct dentry *open_root_dentry(struct ceph_fs_client *fsc,
return root;
}

-
-
-
/*
* mount: join the ceph cluster, and open root directory.
*/
@@ -828,18 +848,14 @@ static struct dentry *ceph_real_mount(struct ceph_fs_client *fsc)
mutex_lock(&fsc->client->mount_mutex);

if (!fsc->sb->s_root) {
- const char *path;
+ const char *path = fsc->mount_options->server_path ?
+ fsc->mount_options->server_path + 1 : "";
+
err = __ceph_open_session(fsc->client, started);
if (err < 0)
goto out;

- if (!fsc->mount_options->server_path) {
- path = "";
- dout("mount opening path \\t\n");
- } else {
- path = fsc->mount_options->server_path + 1;
- dout("mount opening path %s\n", path);
- }
+ dout("mount opening path '%s'\n", path);

err = ceph_fs_debugfs_init(fsc);
if (err < 0)
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index 9bd0d928057b..9f18635f78c7 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -70,7 +70,7 @@ struct ceph_mount_options {

char *snapdir_name; /* default ".snap" */
char *mds_namespace; /* default NULL */
- char *server_path; /* default "/" */
+ char *server_path; /* default NULL (means "/") */
};

struct ceph_fs_client {
diff --git a/include/uapi/linux/coresight-stm.h b/include/uapi/linux/coresight-stm.h
index 7e4272cf1fb2..741309cedd2c 100644
--- a/include/uapi/linux/coresight-stm.h
+++ b/include/uapi/linux/coresight-stm.h
@@ -1,8 +1,10 @@
#ifndef __UAPI_CORESIGHT_STM_H_
#define __UAPI_CORESIGHT_STM_H_

-#define STM_FLAG_TIMESTAMPED BIT(3)
-#define STM_FLAG_GUARANTEED BIT(7)
+#include <linux/const.h>
+
+#define STM_FLAG_TIMESTAMPED _BITUL(3)
+#define STM_FLAG_GUARANTEED _BITUL(7)

/*
* The CoreSight STM supports guaranteed and invariant timing
diff --git a/kernel/padata.c b/kernel/padata.c
index 286c5142a0f7..6939111b3cbe 100644
--- a/kernel/padata.c
+++ b/kernel/padata.c
@@ -614,8 +614,8 @@ int padata_set_cpumask(struct padata_instance *pinst, int cpumask_type,
struct cpumask *serial_mask, *parallel_mask;
int err = -EINVAL;

- mutex_lock(&pinst->lock);
get_online_cpus();
+ mutex_lock(&pinst->lock);

switch (cpumask_type) {
case PADATA_CPU_PARALLEL:
@@ -633,8 +633,8 @@ int padata_set_cpumask(struct padata_instance *pinst, int cpumask_type,
err = __padata_set_cpumasks(pinst, parallel_mask, serial_mask);

out:
- put_online_cpus();
mutex_unlock(&pinst->lock);
+ put_online_cpus();

return err;
}
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index da7a932922cb..a2be65bf5d8c 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -2768,7 +2768,9 @@ int mpol_parse_str(char *str, struct mempolicy **mpol)
switch (mode) {
case MPOL_PREFERRED:
/*
- * Insist on a nodelist of one node only
+ * Insist on a nodelist of one node only, although later
+ * we use first_node(nodes) to grab a single node, so here
+ * nodelist (or nodes) cannot be empty.
*/
if (nodelist) {
char *rest = nodelist;
@@ -2776,6 +2778,8 @@ int mpol_parse_str(char *str, struct mempolicy **mpol)
rest++;
if (*rest)
goto out;
+ if (nodes_empty(nodes))
+ goto out;
}
break;
case MPOL_INTERLEAVE:
diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c
index 2f2cb5e27cdd..a8c63ef75f73 100644
--- a/net/bluetooth/rfcomm/tty.c
+++ b/net/bluetooth/rfcomm/tty.c
@@ -413,10 +413,8 @@ static int __rfcomm_create_dev(struct sock *sk, void __user *arg)
dlc = rfcomm_dlc_exists(&req.src, &req.dst, req.channel);
if (IS_ERR(dlc))
return PTR_ERR(dlc);
- else if (dlc) {
- rfcomm_dlc_put(dlc);
+ if (dlc)
return -EBUSY;
- }
dlc = rfcomm_dlc_alloc(GFP_KERNEL);
if (!dlc)
return -ENOMEM;
diff --git a/net/dsa/tag_brcm.c b/net/dsa/tag_brcm.c
index 76d55a80f3b9..98074338cd83 100644
--- a/net/dsa/tag_brcm.c
+++ b/net/dsa/tag_brcm.c
@@ -84,8 +84,6 @@ static struct sk_buff *brcm_tag_xmit(struct sk_buff *skb, struct net_device *dev
brcm_tag[2] = BRCM_IG_DSTMAP2_MASK;
brcm_tag[3] = (1 << p->port) & BRCM_IG_DSTMAP1_MASK;

- skb->offload_fwd_mark = 1;
-
return skb;

out_free:
@@ -148,6 +146,8 @@ static int brcm_tag_rcv(struct sk_buff *skb, struct net_device *dev,
skb->dev->stats.rx_packets++;
skb->dev->stats.rx_bytes += skb->len;

+ skb->offload_fwd_mark = 1;
+
netif_receive_skb(skb);

return 0;
diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c
index 36f0a8c581d0..a1a7ed6fc8dd 100644
--- a/net/ipv4/fib_trie.c
+++ b/net/ipv4/fib_trie.c
@@ -2256,6 +2256,7 @@ static int fib_triestat_seq_show(struct seq_file *seq, void *v)
" %Zd bytes, size of tnode: %Zd bytes.\n",
LEAF_SIZE, TNODE_SIZE(0));

+ rcu_read_lock();
for (h = 0; h < FIB_TABLE_HASHSZ; h++) {
struct hlist_head *head = &net->ipv4.fib_table_hash[h];
struct fib_table *tb;
@@ -2275,7 +2276,9 @@ static int fib_triestat_seq_show(struct seq_file *seq, void *v)
trie_show_usage(seq, t->stats);
#endif
}
+ cond_resched_rcu();
}
+ rcu_read_unlock();

return 0;
}
diff --git a/net/ipv4/ip_tunnel.c b/net/ipv4/ip_tunnel.c
index 65c47b1f0da4..dd5db4cc7d06 100644
--- a/net/ipv4/ip_tunnel.c
+++ b/net/ipv4/ip_tunnel.c
@@ -155,11 +155,8 @@ struct ip_tunnel *ip_tunnel_lookup(struct ip_tunnel_net *itn,
cand = t;
}

- if (flags & TUNNEL_NO_KEY)
- goto skip_key_lookup;
-
hlist_for_each_entry_rcu(t, head, hash_node) {
- if (t->parms.i_key != key ||
+ if ((!(flags & TUNNEL_NO_KEY) && t->parms.i_key != key) ||
t->parms.iph.saddr != 0 ||
t->parms.iph.daddr != 0 ||
!(t->dev->flags & IFF_UP))
@@ -171,7 +168,6 @@ struct ip_tunnel *ip_tunnel_lookup(struct ip_tunnel_net *itn,
cand = t;
}

-skip_key_lookup:
if (cand)
return cand;

diff --git a/net/l2tp/l2tp_core.c b/net/l2tp/l2tp_core.c
index 394a1ddb0782..7c3da29fad8e 100644
--- a/net/l2tp/l2tp_core.c
+++ b/net/l2tp/l2tp_core.c
@@ -1351,6 +1351,9 @@ void l2tp_tunnel_closeall(struct l2tp_tunnel *tunnel)

hlist_del_init(&session->hlist);

+ if (test_and_set_bit(0, &session->dead))
+ goto again;
+
if (session->ref != NULL)
(*session->ref)(session);

@@ -1799,6 +1802,9 @@ EXPORT_SYMBOL_GPL(__l2tp_session_unhash);
*/
int l2tp_session_delete(struct l2tp_session *session)
{
+ if (test_and_set_bit(0, &session->dead))
+ return 0;
+
if (session->ref)
(*session->ref)(session);
__l2tp_session_unhash(session);
diff --git a/net/l2tp/l2tp_core.h b/net/l2tp/l2tp_core.h
index 7cc49715606e..7c2037184b6c 100644
--- a/net/l2tp/l2tp_core.h
+++ b/net/l2tp/l2tp_core.h
@@ -84,6 +84,7 @@ struct l2tp_session_cfg {
struct l2tp_session {
int magic; /* should be
* L2TP_SESSION_MAGIC */
+ long dead;

struct l2tp_tunnel *tunnel; /* back pointer to tunnel
* context */
diff --git a/net/l2tp/l2tp_ppp.c b/net/l2tp/l2tp_ppp.c
index 16b63e60396f..d919b3e6b548 100644
--- a/net/l2tp/l2tp_ppp.c
+++ b/net/l2tp/l2tp_ppp.c
@@ -437,11 +437,11 @@ static void pppol2tp_session_close(struct l2tp_session *session)

BUG_ON(session->magic != L2TP_SESSION_MAGIC);

- if (sock) {
+ if (sock)
inet_shutdown(sock, SEND_SHUTDOWN);
- /* Don't let the session go away before our socket does */
- l2tp_session_inc_refcount(session);
- }
+
+ /* Don't let the session go away before our socket does */
+ l2tp_session_inc_refcount(session);
}

/* Really kill the session socket. (Called from sock_put() if
diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c
index 824ebbffea33..34ab7f92f064 100644
--- a/net/sctp/ipv6.c
+++ b/net/sctp/ipv6.c
@@ -235,7 +235,8 @@ static void sctp_v6_get_dst(struct sctp_transport *t, union sctp_addr *saddr,
{
struct sctp_association *asoc = t->asoc;
struct dst_entry *dst = NULL;
- struct flowi6 *fl6 = &fl->u.ip6;
+ struct flowi _fl;
+ struct flowi6 *fl6 = &_fl.u.ip6;
struct sctp_bind_addr *bp;
struct ipv6_pinfo *np = inet6_sk(sk);
struct sctp_sockaddr_entry *laddr;
@@ -245,7 +246,7 @@ static void sctp_v6_get_dst(struct sctp_transport *t, union sctp_addr *saddr,
__u8 matchlen = 0;
sctp_scope_t scope;

- memset(fl6, 0, sizeof(struct flowi6));
+ memset(&_fl, 0, sizeof(_fl));
fl6->daddr = daddr->v6.sin6_addr;
fl6->fl6_dport = daddr->v6.sin6_port;
fl6->flowi6_proto = IPPROTO_SCTP;
@@ -269,8 +270,11 @@ static void sctp_v6_get_dst(struct sctp_transport *t, union sctp_addr *saddr,
rcu_read_unlock();

dst = ip6_dst_lookup_flow(sk, fl6, final_p);
- if (!asoc || saddr)
+ if (!asoc || saddr) {
+ t->dst = dst;
+ memcpy(fl, &_fl, sizeof(_fl));
goto out;
+ }

bp = &asoc->base.bind_addr;
scope = sctp_scope(daddr);
@@ -293,6 +297,8 @@ static void sctp_v6_get_dst(struct sctp_transport *t, union sctp_addr *saddr,
if ((laddr->a.sa.sa_family == AF_INET6) &&
(sctp_v6_cmp_addr(&dst_saddr, &laddr->a))) {
rcu_read_unlock();
+ t->dst = dst;
+ memcpy(fl, &_fl, sizeof(_fl));
goto out;
}
}
@@ -331,6 +337,8 @@ static void sctp_v6_get_dst(struct sctp_transport *t, union sctp_addr *saddr,
if (!IS_ERR_OR_NULL(dst))
dst_release(dst);
dst = bdst;
+ t->dst = dst;
+ memcpy(fl, &_fl, sizeof(_fl));
break;
}

@@ -344,6 +352,8 @@ static void sctp_v6_get_dst(struct sctp_transport *t, union sctp_addr *saddr,
dst_release(dst);
dst = bdst;
matchlen = bmatchlen;
+ t->dst = dst;
+ memcpy(fl, &_fl, sizeof(_fl));
}
rcu_read_unlock();

@@ -352,14 +362,12 @@ static void sctp_v6_get_dst(struct sctp_transport *t, union sctp_addr *saddr,
struct rt6_info *rt;

rt = (struct rt6_info *)dst;
- t->dst = dst;
t->dst_cookie = rt6_get_cookie(rt);
pr_debug("rt6_dst:%pI6/%d rt6_src:%pI6\n",
&rt->rt6i_dst.addr, rt->rt6i_dst.plen,
- &fl6->saddr);
+ &fl->u.ip6.saddr);
} else {
t->dst = NULL;
-
pr_debug("no route\n");
}
}
diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
index 446503d3b80c..c5a2a538279b 100644
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c
@@ -430,14 +430,15 @@ static void sctp_v4_get_dst(struct sctp_transport *t, union sctp_addr *saddr,
{
struct sctp_association *asoc = t->asoc;
struct rtable *rt;
- struct flowi4 *fl4 = &fl->u.ip4;
+ struct flowi _fl;
+ struct flowi4 *fl4 = &_fl.u.ip4;
struct sctp_bind_addr *bp;
struct sctp_sockaddr_entry *laddr;
struct dst_entry *dst = NULL;
union sctp_addr *daddr = &t->ipaddr;
union sctp_addr dst_saddr;

- memset(fl4, 0x0, sizeof(struct flowi4));
+ memset(&_fl, 0x0, sizeof(_fl));
fl4->daddr = daddr->v4.sin_addr.s_addr;
fl4->fl4_dport = daddr->v4.sin_port;
fl4->flowi4_proto = IPPROTO_SCTP;
@@ -455,8 +456,11 @@ static void sctp_v4_get_dst(struct sctp_transport *t, union sctp_addr *saddr,
&fl4->saddr);

rt = ip_route_output_key(sock_net(sk), fl4);
- if (!IS_ERR(rt))
+ if (!IS_ERR(rt)) {
dst = &rt->dst;
+ t->dst = dst;
+ memcpy(fl, &_fl, sizeof(_fl));
+ }

/* If there is no association or if a source address is passed, no
* more validation is required.
@@ -519,27 +523,33 @@ static void sctp_v4_get_dst(struct sctp_transport *t, union sctp_addr *saddr,
odev = __ip_dev_find(sock_net(sk), laddr->a.v4.sin_addr.s_addr,
false);
if (!odev || odev->ifindex != fl4->flowi4_oif) {
- if (!dst)
+ if (!dst) {
dst = &rt->dst;
- else
+ t->dst = dst;
+ memcpy(fl, &_fl, sizeof(_fl));
+ } else {
dst_release(&rt->dst);
+ }
continue;
}

dst_release(dst);
dst = &rt->dst;
+ t->dst = dst;
+ memcpy(fl, &_fl, sizeof(_fl));
break;
}

out_unlock:
rcu_read_unlock();
out:
- t->dst = dst;
- if (dst)
+ if (dst) {
pr_debug("rt_dst:%pI4, rt_src:%pI4\n",
- &fl4->daddr, &fl4->saddr);
- else
+ &fl->u.ip4.daddr, &fl->u.ip4.saddr);
+ } else {
+ t->dst = NULL;
pr_debug("no route\n");
+ }
}

/* For v4, the source address is cached in the route entry(dst). So no need
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 21ec92011585..95f39dde1e08 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -173,29 +173,44 @@ static void sctp_clear_owner_w(struct sctp_chunk *chunk)
skb_orphan(chunk->skb);
}

+#define traverse_and_process() \
+do { \
+ msg = chunk->msg; \
+ if (msg == prev_msg) \
+ continue; \
+ list_for_each_entry(c, &msg->chunks, frag_list) { \
+ if ((clear && asoc->base.sk == c->skb->sk) || \
+ (!clear && asoc->base.sk != c->skb->sk)) \
+ cb(c); \
+ } \
+ prev_msg = msg; \
+} while (0)
+
static void sctp_for_each_tx_datachunk(struct sctp_association *asoc,
+ bool clear,
void (*cb)(struct sctp_chunk *))

{
+ struct sctp_datamsg *msg, *prev_msg = NULL;
struct sctp_outq *q = &asoc->outqueue;
+ struct sctp_chunk *chunk, *c;
struct sctp_transport *t;
- struct sctp_chunk *chunk;

list_for_each_entry(t, &asoc->peer.transport_addr_list, transports)
list_for_each_entry(chunk, &t->transmitted, transmitted_list)
- cb(chunk);
+ traverse_and_process();

list_for_each_entry(chunk, &q->retransmit, transmitted_list)
- cb(chunk);
+ traverse_and_process();

list_for_each_entry(chunk, &q->sacked, transmitted_list)
- cb(chunk);
+ traverse_and_process();

list_for_each_entry(chunk, &q->abandoned, transmitted_list)
- cb(chunk);
+ traverse_and_process();

list_for_each_entry(chunk, &q->out_chunk_list, list)
- cb(chunk);
+ traverse_and_process();
}

/* Verify that this is a valid address. */
@@ -7878,9 +7893,9 @@ static void sctp_sock_migrate(struct sock *oldsk, struct sock *newsk,
* paths won't try to lock it and then oldsk.
*/
lock_sock_nested(newsk, SINGLE_DEPTH_NESTING);
- sctp_for_each_tx_datachunk(assoc, sctp_clear_owner_w);
+ sctp_for_each_tx_datachunk(assoc, true, sctp_clear_owner_w);
sctp_assoc_migrate(assoc, newsk);
- sctp_for_each_tx_datachunk(assoc, sctp_set_owner_w);
+ sctp_for_each_tx_datachunk(assoc, false, sctp_set_owner_w);

/* If the association on the newsk is already closed before accept()
* is called, set RCV_SHUTDOWN flag.
diff --git a/sound/soc/jz4740/jz4740-i2s.c b/sound/soc/jz4740/jz4740-i2s.c
index 794a3499e567..0dc1ab48fceb 100644
--- a/sound/soc/jz4740/jz4740-i2s.c
+++ b/sound/soc/jz4740/jz4740-i2s.c
@@ -92,7 +92,7 @@
#define JZ_AIC_I2S_STATUS_BUSY BIT(2)

#define JZ_AIC_CLK_DIV_MASK 0xf
-#define I2SDIV_DV_SHIFT 8
+#define I2SDIV_DV_SHIFT 0
#define I2SDIV_DV_MASK (0xf << I2SDIV_DV_SHIFT)
#define I2SDIV_IDV_SHIFT 8
#define I2SDIV_IDV_MASK (0xf << I2SDIV_IDV_SHIFT)
diff --git a/tools/accounting/getdelays.c b/tools/accounting/getdelays.c
index b5ca536e56a8..34df10a43ef0 100644
--- a/tools/accounting/getdelays.c
+++ b/tools/accounting/getdelays.c
@@ -135,7 +135,7 @@ static int send_cmd(int sd, __u16 nlmsg_type, __u32 nlmsg_pid,
msg.g.version = 0x1;
na = (struct nlattr *) GENLMSG_DATA(&msg);
na->nla_type = nla_type;
- na->nla_len = nla_len + 1 + NLA_HDRLEN;
+ na->nla_len = nla_len + NLA_HDRLEN;
memcpy(NLA_DATA(na), nla_data, nla_len);
msg.n.nlmsg_len += NLMSG_ALIGN(na->nla_len);