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Date: Wed, 15 Mar 2017 11:05:00 +0800
From: Greg KH <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org,
Andrew Morton <akpm@...ux-foundation.org>,
torvalds@...ux-foundation.org, stable@...r.kernel.org
Cc: lwn@....net, Jiri Slaby <jslaby@...e.cz>
Subject: Re: Linux 4.4.54
diff --git a/Makefile b/Makefile
index 10aec937e9e4..7f54ac081cf3 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
VERSION = 4
PATCHLEVEL = 4
-SUBLEVEL = 53
+SUBLEVEL = 54
EXTRAVERSION =
NAME = Blurry Fish Butt
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h
index c1ea67db8404..c61ed7890cef 100644
--- a/arch/s390/include/asm/processor.h
+++ b/arch/s390/include/asm/processor.h
@@ -74,7 +74,8 @@ extern void execve_tail(void);
* User space process size: 2GB for 31 bit, 4TB or 8PT for 64 bit.
*/
-#define TASK_SIZE_OF(tsk) ((tsk)->mm->context.asce_limit)
+#define TASK_SIZE_OF(tsk) ((tsk)->mm ? \
+ (tsk)->mm->context.asce_limit : TASK_MAX_SIZE)
#define TASK_UNMAPPED_BASE (test_thread_flag(TIF_31BIT) ? \
(1UL << 30) : (1UL << 41))
#define TASK_SIZE TASK_SIZE_OF(current)
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 1f581eb61bc2..d097d71685df 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -805,10 +805,10 @@ static void __init setup_randomness(void)
{
struct sysinfo_3_2_2 *vmms;
- vmms = (struct sysinfo_3_2_2 *) alloc_page(GFP_KERNEL);
- if (vmms && stsi(vmms, 3, 2, 2) == 0 && vmms->count)
- add_device_randomness(&vmms, vmms->count);
- free_page((unsigned long) vmms);
+ vmms = (struct sysinfo_3_2_2 *) memblock_alloc(PAGE_SIZE, PAGE_SIZE);
+ if (stsi(vmms, 3, 2, 2) == 0 && vmms->count)
+ add_device_randomness(&vmms->vm, sizeof(vmms->vm[0]) * vmms->count);
+ memblock_free((unsigned long) vmms, PAGE_SIZE);
}
/*
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 575dc123bda2..23e3f5d77a24 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -295,6 +295,9 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
struct kvm_memory_slot *memslot;
int is_dirty = 0;
+ if (kvm_is_ucontrol(kvm))
+ return -EINVAL;
+
mutex_lock(&kvm->slots_lock);
r = -EINVAL;
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 64f60a48def1..3a7ae80dc49d 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -3499,7 +3499,7 @@ static void fix_rmode_seg(int seg, struct kvm_segment *save)
}
vmcs_write16(sf->selector, var.selector);
- vmcs_write32(sf->base, var.base);
+ vmcs_writel(sf->base, var.base);
vmcs_write32(sf->limit, var.limit);
vmcs_write32(sf->ar_bytes, vmx_segment_access_rights(&var));
}
@@ -7905,7 +7905,7 @@ static void kvm_flush_pml_buffers(struct kvm *kvm)
static void vmx_dump_sel(char *name, uint32_t sel)
{
pr_err("%s sel=0x%04x, attr=0x%05x, limit=0x%08x, base=0x%016lx\n",
- name, vmcs_read32(sel),
+ name, vmcs_read16(sel),
vmcs_read32(sel + GUEST_ES_AR_BYTES - GUEST_ES_SELECTOR),
vmcs_read32(sel + GUEST_ES_LIMIT - GUEST_ES_SELECTOR),
vmcs_readl(sel + GUEST_ES_BASE - GUEST_ES_SELECTOR));
diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c
index 9735691f37f1..49ccbd9022f6 100644
--- a/arch/xtensa/kernel/setup.c
+++ b/arch/xtensa/kernel/setup.c
@@ -133,6 +133,8 @@ static int __init parse_tag_initrd(const bp_tag_t* tag)
__tagtable(BP_TAG_INITRD, parse_tag_initrd);
+#endif /* CONFIG_BLK_DEV_INITRD */
+
#ifdef CONFIG_OF
static int __init parse_tag_fdt(const bp_tag_t *tag)
@@ -145,8 +147,6 @@ __tagtable(BP_TAG_FDT, parse_tag_fdt);
#endif /* CONFIG_OF */
-#endif /* CONFIG_BLK_DEV_INITRD */
-
static int __init parse_tag_cmdline(const bp_tag_t* tag)
{
strlcpy(command_line, (char *)(tag->data), COMMAND_LINE_SIZE);
diff --git a/drivers/bluetooth/ath3k.c b/drivers/bluetooth/ath3k.c
index 0beaa52df66b..5df8e1234505 100644
--- a/drivers/bluetooth/ath3k.c
+++ b/drivers/bluetooth/ath3k.c
@@ -94,6 +94,7 @@ static const struct usb_device_id ath3k_table[] = {
{ USB_DEVICE(0x04CA, 0x300f) },
{ USB_DEVICE(0x04CA, 0x3010) },
{ USB_DEVICE(0x04CA, 0x3014) },
+ { USB_DEVICE(0x04CA, 0x3018) },
{ USB_DEVICE(0x0930, 0x0219) },
{ USB_DEVICE(0x0930, 0x021c) },
{ USB_DEVICE(0x0930, 0x0220) },
@@ -160,6 +161,7 @@ static const struct usb_device_id ath3k_blist_tbl[] = {
{ USB_DEVICE(0x04ca, 0x300f), .driver_info = BTUSB_ATH3012 },
{ USB_DEVICE(0x04ca, 0x3010), .driver_info = BTUSB_ATH3012 },
{ USB_DEVICE(0x04ca, 0x3014), .driver_info = BTUSB_ATH3012 },
+ { USB_DEVICE(0x04ca, 0x3018), .driver_info = BTUSB_ATH3012 },
{ USB_DEVICE(0x0930, 0x0219), .driver_info = BTUSB_ATH3012 },
{ USB_DEVICE(0x0930, 0x021c), .driver_info = BTUSB_ATH3012 },
{ USB_DEVICE(0x0930, 0x0220), .driver_info = BTUSB_ATH3012 },
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index c306b483de60..cd6b141b9825 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -208,6 +208,7 @@ static const struct usb_device_id blacklist_table[] = {
{ USB_DEVICE(0x04ca, 0x300f), .driver_info = BTUSB_ATH3012 },
{ USB_DEVICE(0x04ca, 0x3010), .driver_info = BTUSB_ATH3012 },
{ USB_DEVICE(0x04ca, 0x3014), .driver_info = BTUSB_ATH3012 },
+ { USB_DEVICE(0x04ca, 0x3018), .driver_info = BTUSB_ATH3012 },
{ USB_DEVICE(0x0930, 0x0219), .driver_info = BTUSB_ATH3012 },
{ USB_DEVICE(0x0930, 0x021c), .driver_info = BTUSB_ATH3012 },
{ USB_DEVICE(0x0930, 0x0220), .driver_info = BTUSB_ATH3012 },
diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c
index c161eeda417b..267749a94c5a 100644
--- a/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c
@@ -3704,9 +3704,15 @@ static void dce_v11_0_encoder_add(struct amdgpu_device *adev,
default:
encoder->possible_crtcs = 0x3;
break;
+ case 3:
+ encoder->possible_crtcs = 0x7;
+ break;
case 4:
encoder->possible_crtcs = 0xf;
break;
+ case 5:
+ encoder->possible_crtcs = 0x1f;
+ break;
case 6:
encoder->possible_crtcs = 0x3f;
break;
diff --git a/drivers/gpu/drm/ast/ast_post.c b/drivers/gpu/drm/ast/ast_post.c
index 810c51d92b99..30672a3df8a9 100644
--- a/drivers/gpu/drm/ast/ast_post.c
+++ b/drivers/gpu/drm/ast/ast_post.c
@@ -58,13 +58,9 @@ bool ast_is_vga_enabled(struct drm_device *dev)
/* TODO 1180 */
} else {
ch = ast_io_read8(ast, AST_IO_VGA_ENABLE_PORT);
- if (ch) {
- ast_open_key(ast);
- ch = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb6, 0xff);
- return ch & 0x04;
- }
+ return !!(ch & 0x01);
}
- return 0;
+ return false;
}
static const u8 extreginfo[] = { 0x0f, 0x04, 0x1c, 0xff };
@@ -375,8 +371,8 @@ void ast_post_gpu(struct drm_device *dev)
pci_write_config_dword(ast->dev->pdev, 0x04, reg);
ast_enable_vga(dev);
- ast_enable_mmio(dev);
ast_open_key(ast);
+ ast_enable_mmio(dev);
ast_set_def_ext_reg(dev);
if (ast->chip == AST2300 || ast->chip == AST2400)
@@ -1630,12 +1626,44 @@ static void ast_init_dram_2300(struct drm_device *dev)
temp |= 0x73;
ast_write32(ast, 0x12008, temp);
+ param.dram_freq = 396;
param.dram_type = AST_DDR3;
+ temp = ast_mindwm(ast, 0x1e6e2070);
if (temp & 0x01000000)
param.dram_type = AST_DDR2;
- param.dram_chipid = ast->dram_type;
- param.dram_freq = ast->mclk;
- param.vram_size = ast->vram_size;
+ switch (temp & 0x18000000) {
+ case 0:
+ param.dram_chipid = AST_DRAM_512Mx16;
+ break;
+ default:
+ case 0x08000000:
+ param.dram_chipid = AST_DRAM_1Gx16;
+ break;
+ case 0x10000000:
+ param.dram_chipid = AST_DRAM_2Gx16;
+ break;
+ case 0x18000000:
+ param.dram_chipid = AST_DRAM_4Gx16;
+ break;
+ }
+ switch (temp & 0x0c) {
+ default:
+ case 0x00:
+ param.vram_size = AST_VIDMEM_SIZE_8M;
+ break;
+
+ case 0x04:
+ param.vram_size = AST_VIDMEM_SIZE_16M;
+ break;
+
+ case 0x08:
+ param.vram_size = AST_VIDMEM_SIZE_32M;
+ break;
+
+ case 0x0c:
+ param.vram_size = AST_VIDMEM_SIZE_64M;
+ break;
+ }
if (param.dram_type == AST_DDR3) {
get_ddr3_info(ast, ¶m);
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index 1ac29d703c12..ea443fafb934 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -265,7 +265,7 @@ mode_fixup(struct drm_atomic_state *state)
struct drm_connector *connector;
struct drm_connector_state *conn_state;
int i;
- bool ret;
+ int ret;
for_each_crtc_in_state(state, crtc, crtc_state, i) {
if (!crtc_state->mode_changed &&
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 8c9ac021608f..cc1e16fd7e76 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -144,6 +144,9 @@ static struct edid_quirk {
/* Panel in Samsung NP700G7A-S01PL notebook reports 6bpc */
{ "SEC", 0xd033, EDID_QUIRK_FORCE_8BPC },
+
+ /* Rotel RSX-1058 forwards sink's EDID but only does HDMI 1.1*/
+ { "ETR", 13896, EDID_QUIRK_FORCE_8BPC },
};
/*
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 3f802163f7d4..e7c18519274a 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -6803,7 +6803,18 @@ static void ivybridge_init_clock_gating(struct drm_device *dev)
static void vlv_init_display_clock_gating(struct drm_i915_private *dev_priv)
{
- I915_WRITE(DSPCLK_GATE_D, VRHUNIT_CLOCK_GATE_DISABLE);
+ u32 val;
+
+ /*
+ * On driver load, a pipe may be active and driving a DSI display.
+ * Preserve DPOUNIT_CLOCK_GATE_DISABLE to avoid the pipe getting stuck
+ * (and never recovering) in this case. intel_dsi_post_disable() will
+ * clear it when we turn off the display.
+ */
+ val = I915_READ(DSPCLK_GATE_D);
+ val &= DPOUNIT_CLOCK_GATE_DISABLE;
+ val |= VRHUNIT_CLOCK_GATE_DISABLE;
+ I915_WRITE(DSPCLK_GATE_D, val);
/*
* Disable trickle feed and enable pnd deadline calculation
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 4ae8b56b1847..037c38bb5333 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -1621,7 +1621,6 @@ static int ttm_bo_swapout(struct ttm_mem_shrink *shrink)
struct ttm_buffer_object *bo;
int ret = -EBUSY;
int put_count;
- uint32_t swap_placement = (TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM);
spin_lock(&glob->lru_lock);
list_for_each_entry(bo, &glob->swap_lru, swap) {
@@ -1657,7 +1656,8 @@ static int ttm_bo_swapout(struct ttm_mem_shrink *shrink)
if (unlikely(ret != 0))
goto out;
- if ((bo->mem.placement & swap_placement) != swap_placement) {
+ if (bo->mem.mem_type != TTM_PL_SYSTEM ||
+ bo->ttm->caching_state != tt_cached) {
struct ttm_mem_reg evict_mem;
evict_mem = bo->mem;
diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c
index 89fd0113aa5c..57c191798699 100644
--- a/drivers/hv/hv.c
+++ b/drivers/hv/hv.c
@@ -219,7 +219,7 @@ int hv_init(void)
/* See if the hypercall page is already set */
rdmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64);
- virtaddr = __vmalloc(PAGE_SIZE, GFP_KERNEL, PAGE_KERNEL_EXEC);
+ virtaddr = __vmalloc(PAGE_SIZE, GFP_KERNEL, PAGE_KERNEL_RX);
if (!virtaddr)
goto cleanup;
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_cm.c b/drivers/infiniband/ulp/ipoib/ipoib_cm.c
index 3ba7de5f9379..2018d24344de 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_cm.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_cm.c
@@ -1488,12 +1488,14 @@ static ssize_t set_mode(struct device *d, struct device_attribute *attr,
ret = ipoib_set_mode(dev, buf);
- rtnl_unlock();
-
- if (!ret)
- return count;
+ /* The assumption is that the function ipoib_set_mode returned
+ * with the rtnl held by it, if not the value -EBUSY returned,
+ * then no need to rtnl_unlock
+ */
+ if (ret != -EBUSY)
+ rtnl_unlock();
- return ret;
+ return (!ret || ret == -EBUSY) ? count : ret;
}
static DEVICE_ATTR(mode, S_IWUSR | S_IRUGO, show_mode, set_mode);
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c
index 8a4d10452d61..8efcff1beb8f 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_main.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c
@@ -464,8 +464,7 @@ int ipoib_set_mode(struct net_device *dev, const char *buf)
priv->tx_wr.wr.send_flags &= ~IB_SEND_IP_CSUM;
ipoib_flush_paths(dev);
- rtnl_lock();
- return 0;
+ return (!rtnl_trylock()) ? -EBUSY : 0;
}
if (!strcmp(buf, "datagram\n")) {
@@ -474,8 +473,7 @@ int ipoib_set_mode(struct net_device *dev, const char *buf)
dev_set_mtu(dev, min(priv->mcast_mtu, dev->mtu));
rtnl_unlock();
ipoib_flush_paths(dev);
- rtnl_lock();
- return 0;
+ return (!rtnl_trylock()) ? -EBUSY : 0;
}
return -EINVAL;
@@ -628,6 +626,14 @@ void ipoib_mark_paths_invalid(struct net_device *dev)
spin_unlock_irq(&priv->lock);
}
+static void push_pseudo_header(struct sk_buff *skb, const char *daddr)
+{
+ struct ipoib_pseudo_header *phdr;
+
+ phdr = (struct ipoib_pseudo_header *)skb_push(skb, sizeof(*phdr));
+ memcpy(phdr->hwaddr, daddr, INFINIBAND_ALEN);
+}
+
void ipoib_flush_paths(struct net_device *dev)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
@@ -852,8 +858,7 @@ static void neigh_add_path(struct sk_buff *skb, u8 *daddr,
}
if (skb_queue_len(&neigh->queue) <
IPOIB_MAX_PATH_REC_QUEUE) {
- /* put pseudoheader back on for next time */
- skb_push(skb, IPOIB_PSEUDO_LEN);
+ push_pseudo_header(skb, neigh->daddr);
__skb_queue_tail(&neigh->queue, skb);
} else {
ipoib_warn(priv, "queue length limit %d. Packet drop.\n",
@@ -871,10 +876,12 @@ static void neigh_add_path(struct sk_buff *skb, u8 *daddr,
if (!path->query && path_rec_start(dev, path))
goto err_path;
- if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE)
+ if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
+ push_pseudo_header(skb, neigh->daddr);
__skb_queue_tail(&neigh->queue, skb);
- else
+ } else {
goto err_drop;
+ }
}
spin_unlock_irqrestore(&priv->lock, flags);
@@ -910,8 +917,7 @@ static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev,
}
if (path) {
if (skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
- /* put pseudoheader back on for next time */
- skb_push(skb, IPOIB_PSEUDO_LEN);
+ push_pseudo_header(skb, phdr->hwaddr);
__skb_queue_tail(&path->queue, skb);
} else {
++dev->stats.tx_dropped;
@@ -943,8 +949,7 @@ static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev,
return;
} else if ((path->query || !path_rec_start(dev, path)) &&
skb_queue_len(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
- /* put pseudoheader back on for next time */
- skb_push(skb, IPOIB_PSEUDO_LEN);
+ push_pseudo_header(skb, phdr->hwaddr);
__skb_queue_tail(&path->queue, skb);
} else {
++dev->stats.tx_dropped;
@@ -1025,8 +1030,7 @@ send_using_neigh:
}
if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
- /* put pseudoheader back on for next time */
- skb_push(skb, sizeof(*phdr));
+ push_pseudo_header(skb, phdr->hwaddr);
spin_lock_irqsave(&priv->lock, flags);
__skb_queue_tail(&neigh->queue, skb);
spin_unlock_irqrestore(&priv->lock, flags);
@@ -1058,7 +1062,6 @@ static int ipoib_hard_header(struct sk_buff *skb,
unsigned short type,
const void *daddr, const void *saddr, unsigned len)
{
- struct ipoib_pseudo_header *phdr;
struct ipoib_header *header;
header = (struct ipoib_header *) skb_push(skb, sizeof *header);
@@ -1071,8 +1074,7 @@ static int ipoib_hard_header(struct sk_buff *skb,
* destination address into skb hard header so we can figure out where
* to send the packet later.
*/
- phdr = (struct ipoib_pseudo_header *) skb_push(skb, sizeof(*phdr));
- memcpy(phdr->hwaddr, daddr, INFINIBAND_ALEN);
+ push_pseudo_header(skb, daddr);
return IPOIB_HARD_LEN;
}
diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c
index 5f0f4fc58f43..e397f1b0af09 100644
--- a/drivers/infiniband/ulp/srp/ib_srp.c
+++ b/drivers/infiniband/ulp/srp/ib_srp.c
@@ -1787,17 +1787,24 @@ static void srp_process_rsp(struct srp_rdma_ch *ch, struct srp_rsp *rsp)
if (unlikely(rsp->tag & SRP_TAG_TSK_MGMT)) {
spin_lock_irqsave(&ch->lock, flags);
ch->req_lim += be32_to_cpu(rsp->req_lim_delta);
+ if (rsp->tag == ch->tsk_mgmt_tag) {
+ ch->tsk_mgmt_status = -1;
+ if (be32_to_cpu(rsp->resp_data_len) >= 4)
+ ch->tsk_mgmt_status = rsp->data[3];
+ complete(&ch->tsk_mgmt_done);
+ } else {
+ shost_printk(KERN_ERR, target->scsi_host,
+ "Received tsk mgmt response too late for tag %#llx\n",
+ rsp->tag);
+ }
spin_unlock_irqrestore(&ch->lock, flags);
-
- ch->tsk_mgmt_status = -1;
- if (be32_to_cpu(rsp->resp_data_len) >= 4)
- ch->tsk_mgmt_status = rsp->data[3];
- complete(&ch->tsk_mgmt_done);
} else {
scmnd = scsi_host_find_tag(target->scsi_host, rsp->tag);
- if (scmnd) {
+ if (scmnd && scmnd->host_scribble) {
req = (void *)scmnd->host_scribble;
scmnd = srp_claim_req(ch, req, NULL, scmnd);
+ } else {
+ scmnd = NULL;
}
if (!scmnd) {
shost_printk(KERN_ERR, target->scsi_host,
@@ -2469,19 +2476,18 @@ srp_change_queue_depth(struct scsi_device *sdev, int qdepth)
}
static int srp_send_tsk_mgmt(struct srp_rdma_ch *ch, u64 req_tag, u64 lun,
- u8 func)
+ u8 func, u8 *status)
{
struct srp_target_port *target = ch->target;
struct srp_rport *rport = target->rport;
struct ib_device *dev = target->srp_host->srp_dev->dev;
struct srp_iu *iu;
struct srp_tsk_mgmt *tsk_mgmt;
+ int res;
if (!ch->connected || target->qp_in_error)
return -1;
- init_completion(&ch->tsk_mgmt_done);
-
/*
* Lock the rport mutex to avoid that srp_create_ch_ib() is
* invoked while a task management function is being sent.
@@ -2504,10 +2510,16 @@ static int srp_send_tsk_mgmt(struct srp_rdma_ch *ch, u64 req_tag, u64 lun,
tsk_mgmt->opcode = SRP_TSK_MGMT;
int_to_scsilun(lun, &tsk_mgmt->lun);
- tsk_mgmt->tag = req_tag | SRP_TAG_TSK_MGMT;
tsk_mgmt->tsk_mgmt_func = func;
tsk_mgmt->task_tag = req_tag;
+ spin_lock_irq(&ch->lock);
+ ch->tsk_mgmt_tag = (ch->tsk_mgmt_tag + 1) | SRP_TAG_TSK_MGMT;
+ tsk_mgmt->tag = ch->tsk_mgmt_tag;
+ spin_unlock_irq(&ch->lock);
+
+ init_completion(&ch->tsk_mgmt_done);
+
ib_dma_sync_single_for_device(dev, iu->dma, sizeof *tsk_mgmt,
DMA_TO_DEVICE);
if (srp_post_send(ch, iu, sizeof(*tsk_mgmt))) {
@@ -2516,13 +2528,15 @@ static int srp_send_tsk_mgmt(struct srp_rdma_ch *ch, u64 req_tag, u64 lun,
return -1;
}
+ res = wait_for_completion_timeout(&ch->tsk_mgmt_done,
+ msecs_to_jiffies(SRP_ABORT_TIMEOUT_MS));
+ if (res > 0 && status)
+ *status = ch->tsk_mgmt_status;
mutex_unlock(&rport->mutex);
- if (!wait_for_completion_timeout(&ch->tsk_mgmt_done,
- msecs_to_jiffies(SRP_ABORT_TIMEOUT_MS)))
- return -1;
+ WARN_ON_ONCE(res < 0);
- return 0;
+ return res > 0 ? 0 : -1;
}
static int srp_abort(struct scsi_cmnd *scmnd)
@@ -2548,7 +2562,7 @@ static int srp_abort(struct scsi_cmnd *scmnd)
shost_printk(KERN_ERR, target->scsi_host,
"Sending SRP abort for tag %#x\n", tag);
if (srp_send_tsk_mgmt(ch, tag, scmnd->device->lun,
- SRP_TSK_ABORT_TASK) == 0)
+ SRP_TSK_ABORT_TASK, NULL) == 0)
ret = SUCCESS;
else if (target->rport->state == SRP_RPORT_LOST)
ret = FAST_IO_FAIL;
@@ -2566,14 +2580,15 @@ static int srp_reset_device(struct scsi_cmnd *scmnd)
struct srp_target_port *target = host_to_target(scmnd->device->host);
struct srp_rdma_ch *ch;
int i;
+ u8 status;
shost_printk(KERN_ERR, target->scsi_host, "SRP reset_device called\n");
ch = &target->ch[0];
if (srp_send_tsk_mgmt(ch, SRP_TAG_NO_REQ, scmnd->device->lun,
- SRP_TSK_LUN_RESET))
+ SRP_TSK_LUN_RESET, &status))
return FAILED;
- if (ch->tsk_mgmt_status)
+ if (status)
return FAILED;
for (i = 0; i < target->ch_count; i++) {
diff --git a/drivers/infiniband/ulp/srp/ib_srp.h b/drivers/infiniband/ulp/srp/ib_srp.h
index f6af531f9f32..109eea94d0f9 100644
--- a/drivers/infiniband/ulp/srp/ib_srp.h
+++ b/drivers/infiniband/ulp/srp/ib_srp.h
@@ -168,6 +168,7 @@ struct srp_rdma_ch {
int max_ti_iu_len;
int comp_vector;
+ u64 tsk_mgmt_tag;
struct completion tsk_mgmt_done;
u8 tsk_mgmt_status;
bool connected;
diff --git a/drivers/net/ethernet/marvell/mvpp2.c b/drivers/net/ethernet/marvell/mvpp2.c
index 25aba9886990..0e67145bc418 100644
--- a/drivers/net/ethernet/marvell/mvpp2.c
+++ b/drivers/net/ethernet/marvell/mvpp2.c
@@ -993,7 +993,7 @@ static void mvpp2_txq_inc_put(struct mvpp2_txq_pcpu *txq_pcpu,
txq_pcpu->buffs + txq_pcpu->txq_put_index;
tx_buf->skb = skb;
tx_buf->size = tx_desc->data_size;
- tx_buf->phys = tx_desc->buf_phys_addr;
+ tx_buf->phys = tx_desc->buf_phys_addr + tx_desc->packet_offset;
txq_pcpu->txq_put_index++;
if (txq_pcpu->txq_put_index == txq_pcpu->size)
txq_pcpu->txq_put_index = 0;
diff --git a/drivers/net/ieee802154/fakelb.c b/drivers/net/ieee802154/fakelb.c
index 860d4aed8274..43617ded3773 100644
--- a/drivers/net/ieee802154/fakelb.c
+++ b/drivers/net/ieee802154/fakelb.c
@@ -30,7 +30,7 @@
static int numlbs = 2;
static LIST_HEAD(fakelb_phys);
-static DEFINE_SPINLOCK(fakelb_phys_lock);
+static DEFINE_MUTEX(fakelb_phys_lock);
static LIST_HEAD(fakelb_ifup_phys);
static DEFINE_RWLOCK(fakelb_ifup_phys_lock);
@@ -180,9 +180,9 @@ static int fakelb_add_one(struct device *dev)
if (err)
goto err_reg;
- spin_lock(&fakelb_phys_lock);
+ mutex_lock(&fakelb_phys_lock);
list_add_tail(&phy->list, &fakelb_phys);
- spin_unlock(&fakelb_phys_lock);
+ mutex_unlock(&fakelb_phys_lock);
return 0;
@@ -214,10 +214,10 @@ static int fakelb_probe(struct platform_device *pdev)
return 0;
err_slave:
- spin_lock(&fakelb_phys_lock);
+ mutex_lock(&fakelb_phys_lock);
list_for_each_entry_safe(phy, tmp, &fakelb_phys, list)
fakelb_del(phy);
- spin_unlock(&fakelb_phys_lock);
+ mutex_unlock(&fakelb_phys_lock);
return err;
}
@@ -225,10 +225,10 @@ static int fakelb_remove(struct platform_device *pdev)
{
struct fakelb_phy *phy, *tmp;
- spin_lock(&fakelb_phys_lock);
+ mutex_lock(&fakelb_phys_lock);
list_for_each_entry_safe(phy, tmp, &fakelb_phys, list)
fakelb_del(phy);
- spin_unlock(&fakelb_phys_lock);
+ mutex_unlock(&fakelb_phys_lock);
return 0;
}
diff --git a/drivers/pwm/pwm-pca9685.c b/drivers/pwm/pwm-pca9685.c
index 117fccf7934a..01a6a83f625d 100644
--- a/drivers/pwm/pwm-pca9685.c
+++ b/drivers/pwm/pwm-pca9685.c
@@ -65,7 +65,6 @@
#define PCA9685_MAXCHAN 0x10
#define LED_FULL (1 << 4)
-#define MODE1_RESTART (1 << 7)
#define MODE1_SLEEP (1 << 4)
#define MODE2_INVRT (1 << 4)
#define MODE2_OUTDRV (1 << 2)
@@ -117,16 +116,6 @@ static int pca9685_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
udelay(500);
pca->period_ns = period_ns;
-
- /*
- * If the duty cycle did not change, restart PWM with
- * the same duty cycle to period ratio and return.
- */
- if (duty_ns == pca->duty_ns) {
- regmap_update_bits(pca->regmap, PCA9685_MODE1,
- MODE1_RESTART, 0x1);
- return 0;
- }
} else {
dev_err(chip->dev,
"prescaler not set: period out of bounds!\n");
diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c
index 94a8f4ab57bc..ae1dc37e4068 100644
--- a/drivers/s390/block/dcssblk.c
+++ b/drivers/s390/block/dcssblk.c
@@ -892,7 +892,7 @@ dcssblk_direct_access (struct block_device *bdev, sector_t secnum,
dev_info = bdev->bd_disk->private_data;
if (!dev_info)
return -ENODEV;
- dev_sz = dev_info->end - dev_info->start;
+ dev_sz = dev_info->end - dev_info->start + 1;
offset = secnum * 512;
addr = (void *) (dev_info->start + offset);
*pfn = virt_to_phys(addr) >> PAGE_SHIFT;
diff --git a/drivers/s390/cio/qdio_thinint.c b/drivers/s390/cio/qdio_thinint.c
index 5d06253c2a7a..30e9fbbff051 100644
--- a/drivers/s390/cio/qdio_thinint.c
+++ b/drivers/s390/cio/qdio_thinint.c
@@ -147,11 +147,11 @@ static inline void tiqdio_call_inq_handlers(struct qdio_irq *irq)
struct qdio_q *q;
int i;
- for_each_input_queue(irq, q, i) {
- if (!references_shared_dsci(irq) &&
- has_multiple_inq_on_dsci(irq))
- xchg(q->irq_ptr->dsci, 0);
+ if (!references_shared_dsci(irq) &&
+ has_multiple_inq_on_dsci(irq))
+ xchg(irq->dsci, 0);
+ for_each_input_queue(irq, q, i) {
if (q->u.in.queue_start_poll) {
/* skip if polling is enabled or already in work */
if (test_and_set_bit(QDIO_QUEUE_IRQS_DISABLED,
diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c
index 356c80fbb304..bb6a6c35324a 100644
--- a/drivers/target/target_core_device.c
+++ b/drivers/target/target_core_device.c
@@ -77,12 +77,16 @@ transport_lookup_cmd_lun(struct se_cmd *se_cmd, u64 unpacked_lun)
&deve->read_bytes);
se_lun = rcu_dereference(deve->se_lun);
+
+ if (!percpu_ref_tryget_live(&se_lun->lun_ref)) {
+ se_lun = NULL;
+ goto out_unlock;
+ }
+
se_cmd->se_lun = rcu_dereference(deve->se_lun);
se_cmd->pr_res_key = deve->pr_res_key;
se_cmd->orig_fe_lun = unpacked_lun;
se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
-
- percpu_ref_get(&se_lun->lun_ref);
se_cmd->lun_ref_active = true;
if ((se_cmd->data_direction == DMA_TO_DEVICE) &&
@@ -96,6 +100,7 @@ transport_lookup_cmd_lun(struct se_cmd *se_cmd, u64 unpacked_lun)
goto ref_dev;
}
}
+out_unlock:
rcu_read_unlock();
if (!se_lun) {
@@ -826,6 +831,7 @@ struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
xcopy_lun = &dev->xcopy_lun;
rcu_assign_pointer(xcopy_lun->lun_se_dev, dev);
init_completion(&xcopy_lun->lun_ref_comp);
+ init_completion(&xcopy_lun->lun_shutdown_comp);
INIT_LIST_HEAD(&xcopy_lun->lun_deve_list);
INIT_LIST_HEAD(&xcopy_lun->lun_dev_link);
mutex_init(&xcopy_lun->lun_tg_pt_md_mutex);
diff --git a/drivers/target/target_core_tpg.c b/drivers/target/target_core_tpg.c
index 028854cda97b..2794c6ec5c3c 100644
--- a/drivers/target/target_core_tpg.c
+++ b/drivers/target/target_core_tpg.c
@@ -539,7 +539,7 @@ static void core_tpg_lun_ref_release(struct percpu_ref *ref)
{
struct se_lun *lun = container_of(ref, struct se_lun, lun_ref);
- complete(&lun->lun_ref_comp);
+ complete(&lun->lun_shutdown_comp);
}
int core_tpg_register(
@@ -666,6 +666,7 @@ struct se_lun *core_tpg_alloc_lun(
lun->lun_link_magic = SE_LUN_LINK_MAGIC;
atomic_set(&lun->lun_acl_count, 0);
init_completion(&lun->lun_ref_comp);
+ init_completion(&lun->lun_shutdown_comp);
INIT_LIST_HEAD(&lun->lun_deve_list);
INIT_LIST_HEAD(&lun->lun_dev_link);
atomic_set(&lun->lun_tg_pt_secondary_offline, 0);
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index befe22744802..df2059984e14 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -2680,10 +2680,39 @@ void target_wait_for_sess_cmds(struct se_session *se_sess)
}
EXPORT_SYMBOL(target_wait_for_sess_cmds);
+static void target_lun_confirm(struct percpu_ref *ref)
+{
+ struct se_lun *lun = container_of(ref, struct se_lun, lun_ref);
+
+ complete(&lun->lun_ref_comp);
+}
+
void transport_clear_lun_ref(struct se_lun *lun)
{
- percpu_ref_kill(&lun->lun_ref);
+ /*
+ * Mark the percpu-ref as DEAD, switch to atomic_t mode, drop
+ * the initial reference and schedule confirm kill to be
+ * executed after one full RCU grace period has completed.
+ */
+ percpu_ref_kill_and_confirm(&lun->lun_ref, target_lun_confirm);
+ /*
+ * The first completion waits for percpu_ref_switch_to_atomic_rcu()
+ * to call target_lun_confirm after lun->lun_ref has been marked
+ * as __PERCPU_REF_DEAD on all CPUs, and switches to atomic_t
+ * mode so that percpu_ref_tryget_live() lookup of lun->lun_ref
+ * fails for all new incoming I/O.
+ */
wait_for_completion(&lun->lun_ref_comp);
+ /*
+ * The second completion waits for percpu_ref_put_many() to
+ * invoke ->release() after lun->lun_ref has switched to
+ * atomic_t mode, and lun->lun_ref.count has reached zero.
+ *
+ * At this point all target-core lun->lun_ref references have
+ * been dropped via transport_lun_remove_cmd(), and it's safe
+ * to proceed with the remaining LUN shutdown.
+ */
+ wait_for_completion(&lun->lun_shutdown_comp);
}
static bool
diff --git a/drivers/tty/n_hdlc.c b/drivers/tty/n_hdlc.c
index 644ddb841d9f..6d1e2f746ab4 100644
--- a/drivers/tty/n_hdlc.c
+++ b/drivers/tty/n_hdlc.c
@@ -114,7 +114,7 @@
#define DEFAULT_TX_BUF_COUNT 3
struct n_hdlc_buf {
- struct n_hdlc_buf *link;
+ struct list_head list_item;
int count;
char buf[1];
};
@@ -122,8 +122,7 @@ struct n_hdlc_buf {
#define N_HDLC_BUF_SIZE (sizeof(struct n_hdlc_buf) + maxframe)
struct n_hdlc_buf_list {
- struct n_hdlc_buf *head;
- struct n_hdlc_buf *tail;
+ struct list_head list;
int count;
spinlock_t spinlock;
};
@@ -136,7 +135,6 @@ struct n_hdlc_buf_list {
* @backup_tty - TTY to use if tty gets closed
* @tbusy - reentrancy flag for tx wakeup code
* @woke_up - FIXME: describe this field
- * @tbuf - currently transmitting tx buffer
* @tx_buf_list - list of pending transmit frame buffers
* @rx_buf_list - list of received frame buffers
* @tx_free_buf_list - list unused transmit frame buffers
@@ -149,7 +147,6 @@ struct n_hdlc {
struct tty_struct *backup_tty;
int tbusy;
int woke_up;
- struct n_hdlc_buf *tbuf;
struct n_hdlc_buf_list tx_buf_list;
struct n_hdlc_buf_list rx_buf_list;
struct n_hdlc_buf_list tx_free_buf_list;
@@ -159,7 +156,8 @@ struct n_hdlc {
/*
* HDLC buffer list manipulation functions
*/
-static void n_hdlc_buf_list_init(struct n_hdlc_buf_list *list);
+static void n_hdlc_buf_return(struct n_hdlc_buf_list *buf_list,
+ struct n_hdlc_buf *buf);
static void n_hdlc_buf_put(struct n_hdlc_buf_list *list,
struct n_hdlc_buf *buf);
static struct n_hdlc_buf *n_hdlc_buf_get(struct n_hdlc_buf_list *list);
@@ -209,16 +207,9 @@ static void flush_tx_queue(struct tty_struct *tty)
{
struct n_hdlc *n_hdlc = tty2n_hdlc(tty);
struct n_hdlc_buf *buf;
- unsigned long flags;
while ((buf = n_hdlc_buf_get(&n_hdlc->tx_buf_list)))
n_hdlc_buf_put(&n_hdlc->tx_free_buf_list, buf);
- spin_lock_irqsave(&n_hdlc->tx_buf_list.spinlock, flags);
- if (n_hdlc->tbuf) {
- n_hdlc_buf_put(&n_hdlc->tx_free_buf_list, n_hdlc->tbuf);
- n_hdlc->tbuf = NULL;
- }
- spin_unlock_irqrestore(&n_hdlc->tx_buf_list.spinlock, flags);
}
static struct tty_ldisc_ops n_hdlc_ldisc = {
@@ -284,7 +275,6 @@ static void n_hdlc_release(struct n_hdlc *n_hdlc)
} else
break;
}
- kfree(n_hdlc->tbuf);
kfree(n_hdlc);
} /* end of n_hdlc_release() */
@@ -403,13 +393,7 @@ static void n_hdlc_send_frames(struct n_hdlc *n_hdlc, struct tty_struct *tty)
n_hdlc->woke_up = 0;
spin_unlock_irqrestore(&n_hdlc->tx_buf_list.spinlock, flags);
- /* get current transmit buffer or get new transmit */
- /* buffer from list of pending transmit buffers */
-
- tbuf = n_hdlc->tbuf;
- if (!tbuf)
- tbuf = n_hdlc_buf_get(&n_hdlc->tx_buf_list);
-
+ tbuf = n_hdlc_buf_get(&n_hdlc->tx_buf_list);
while (tbuf) {
if (debuglevel >= DEBUG_LEVEL_INFO)
printk("%s(%d)sending frame %p, count=%d\n",
@@ -421,7 +405,7 @@ static void n_hdlc_send_frames(struct n_hdlc *n_hdlc, struct tty_struct *tty)
/* rollback was possible and has been done */
if (actual == -ERESTARTSYS) {
- n_hdlc->tbuf = tbuf;
+ n_hdlc_buf_return(&n_hdlc->tx_buf_list, tbuf);
break;
}
/* if transmit error, throw frame away by */
@@ -436,10 +420,7 @@ static void n_hdlc_send_frames(struct n_hdlc *n_hdlc, struct tty_struct *tty)
/* free current transmit buffer */
n_hdlc_buf_put(&n_hdlc->tx_free_buf_list, tbuf);
-
- /* this tx buffer is done */
- n_hdlc->tbuf = NULL;
-
+
/* wait up sleeping writers */
wake_up_interruptible(&tty->write_wait);
@@ -449,10 +430,12 @@ static void n_hdlc_send_frames(struct n_hdlc *n_hdlc, struct tty_struct *tty)
if (debuglevel >= DEBUG_LEVEL_INFO)
printk("%s(%d)frame %p pending\n",
__FILE__,__LINE__,tbuf);
-
- /* buffer not accepted by driver */
- /* set this buffer as pending buffer */
- n_hdlc->tbuf = tbuf;
+
+ /*
+ * the buffer was not accepted by driver,
+ * return it back into tx queue
+ */
+ n_hdlc_buf_return(&n_hdlc->tx_buf_list, tbuf);
break;
}
}
@@ -750,7 +733,8 @@ static int n_hdlc_tty_ioctl(struct tty_struct *tty, struct file *file,
int error = 0;
int count;
unsigned long flags;
-
+ struct n_hdlc_buf *buf = NULL;
+
if (debuglevel >= DEBUG_LEVEL_INFO)
printk("%s(%d)n_hdlc_tty_ioctl() called %d\n",
__FILE__,__LINE__,cmd);
@@ -764,8 +748,10 @@ static int n_hdlc_tty_ioctl(struct tty_struct *tty, struct file *file,
/* report count of read data available */
/* in next available frame (if any) */
spin_lock_irqsave(&n_hdlc->rx_buf_list.spinlock,flags);
- if (n_hdlc->rx_buf_list.head)
- count = n_hdlc->rx_buf_list.head->count;
+ buf = list_first_entry_or_null(&n_hdlc->rx_buf_list.list,
+ struct n_hdlc_buf, list_item);
+ if (buf)
+ count = buf->count;
else
count = 0;
spin_unlock_irqrestore(&n_hdlc->rx_buf_list.spinlock,flags);
@@ -777,8 +763,10 @@ static int n_hdlc_tty_ioctl(struct tty_struct *tty, struct file *file,
count = tty_chars_in_buffer(tty);
/* add size of next output frame in queue */
spin_lock_irqsave(&n_hdlc->tx_buf_list.spinlock,flags);
- if (n_hdlc->tx_buf_list.head)
- count += n_hdlc->tx_buf_list.head->count;
+ buf = list_first_entry_or_null(&n_hdlc->tx_buf_list.list,
+ struct n_hdlc_buf, list_item);
+ if (buf)
+ count += buf->count;
spin_unlock_irqrestore(&n_hdlc->tx_buf_list.spinlock,flags);
error = put_user(count, (int __user *)arg);
break;
@@ -826,14 +814,14 @@ static unsigned int n_hdlc_tty_poll(struct tty_struct *tty, struct file *filp,
poll_wait(filp, &tty->write_wait, wait);
/* set bits for operations that won't block */
- if (n_hdlc->rx_buf_list.head)
+ if (!list_empty(&n_hdlc->rx_buf_list.list))
mask |= POLLIN | POLLRDNORM; /* readable */
if (test_bit(TTY_OTHER_CLOSED, &tty->flags))
mask |= POLLHUP;
if (tty_hung_up_p(filp))
mask |= POLLHUP;
if (!tty_is_writelocked(tty) &&
- n_hdlc->tx_free_buf_list.head)
+ !list_empty(&n_hdlc->tx_free_buf_list.list))
mask |= POLLOUT | POLLWRNORM; /* writable */
}
return mask;
@@ -853,11 +841,16 @@ static struct n_hdlc *n_hdlc_alloc(void)
if (!n_hdlc)
return NULL;
- n_hdlc_buf_list_init(&n_hdlc->rx_free_buf_list);
- n_hdlc_buf_list_init(&n_hdlc->tx_free_buf_list);
- n_hdlc_buf_list_init(&n_hdlc->rx_buf_list);
- n_hdlc_buf_list_init(&n_hdlc->tx_buf_list);
-
+ spin_lock_init(&n_hdlc->rx_free_buf_list.spinlock);
+ spin_lock_init(&n_hdlc->tx_free_buf_list.spinlock);
+ spin_lock_init(&n_hdlc->rx_buf_list.spinlock);
+ spin_lock_init(&n_hdlc->tx_buf_list.spinlock);
+
+ INIT_LIST_HEAD(&n_hdlc->rx_free_buf_list.list);
+ INIT_LIST_HEAD(&n_hdlc->tx_free_buf_list.list);
+ INIT_LIST_HEAD(&n_hdlc->rx_buf_list.list);
+ INIT_LIST_HEAD(&n_hdlc->tx_buf_list.list);
+
/* allocate free rx buffer list */
for(i=0;i<DEFAULT_RX_BUF_COUNT;i++) {
buf = kmalloc(N_HDLC_BUF_SIZE, GFP_KERNEL);
@@ -885,63 +878,65 @@ static struct n_hdlc *n_hdlc_alloc(void)
} /* end of n_hdlc_alloc() */
/**
- * n_hdlc_buf_list_init - initialize specified HDLC buffer list
- * @list - pointer to buffer list
+ * n_hdlc_buf_return - put the HDLC buffer after the head of the specified list
+ * @buf_list - pointer to the buffer list
+ * @buf - pointer to the buffer
*/
-static void n_hdlc_buf_list_init(struct n_hdlc_buf_list *list)
+static void n_hdlc_buf_return(struct n_hdlc_buf_list *buf_list,
+ struct n_hdlc_buf *buf)
{
- memset(list, 0, sizeof(*list));
- spin_lock_init(&list->spinlock);
-} /* end of n_hdlc_buf_list_init() */
+ unsigned long flags;
+
+ spin_lock_irqsave(&buf_list->spinlock, flags);
+
+ list_add(&buf->list_item, &buf_list->list);
+ buf_list->count++;
+
+ spin_unlock_irqrestore(&buf_list->spinlock, flags);
+}
/**
* n_hdlc_buf_put - add specified HDLC buffer to tail of specified list
- * @list - pointer to buffer list
+ * @buf_list - pointer to buffer list
* @buf - pointer to buffer
*/
-static void n_hdlc_buf_put(struct n_hdlc_buf_list *list,
+static void n_hdlc_buf_put(struct n_hdlc_buf_list *buf_list,
struct n_hdlc_buf *buf)
{
unsigned long flags;
- spin_lock_irqsave(&list->spinlock,flags);
-
- buf->link=NULL;
- if (list->tail)
- list->tail->link = buf;
- else
- list->head = buf;
- list->tail = buf;
- (list->count)++;
-
- spin_unlock_irqrestore(&list->spinlock,flags);
-
+
+ spin_lock_irqsave(&buf_list->spinlock, flags);
+
+ list_add_tail(&buf->list_item, &buf_list->list);
+ buf_list->count++;
+
+ spin_unlock_irqrestore(&buf_list->spinlock, flags);
} /* end of n_hdlc_buf_put() */
/**
* n_hdlc_buf_get - remove and return an HDLC buffer from list
- * @list - pointer to HDLC buffer list
+ * @buf_list - pointer to HDLC buffer list
*
* Remove and return an HDLC buffer from the head of the specified HDLC buffer
* list.
* Returns a pointer to HDLC buffer if available, otherwise %NULL.
*/
-static struct n_hdlc_buf* n_hdlc_buf_get(struct n_hdlc_buf_list *list)
+static struct n_hdlc_buf *n_hdlc_buf_get(struct n_hdlc_buf_list *buf_list)
{
unsigned long flags;
struct n_hdlc_buf *buf;
- spin_lock_irqsave(&list->spinlock,flags);
-
- buf = list->head;
+
+ spin_lock_irqsave(&buf_list->spinlock, flags);
+
+ buf = list_first_entry_or_null(&buf_list->list,
+ struct n_hdlc_buf, list_item);
if (buf) {
- list->head = buf->link;
- (list->count)--;
+ list_del(&buf->list_item);
+ buf_list->count--;
}
- if (!list->head)
- list->tail = NULL;
-
- spin_unlock_irqrestore(&list->spinlock,flags);
+
+ spin_unlock_irqrestore(&buf_list->spinlock, flags);
return buf;
-
} /* end of n_hdlc_buf_get() */
static char hdlc_banner[] __initdata =
diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c
index 029de3f99752..5b24ffd93649 100644
--- a/drivers/tty/serial/8250/8250_pci.c
+++ b/drivers/tty/serial/8250/8250_pci.c
@@ -2880,6 +2880,8 @@ enum pci_board_num_t {
pbn_b0_4_1152000_200,
pbn_b0_8_1152000_200,
+ pbn_b0_4_1250000,
+
pbn_b0_2_1843200,
pbn_b0_4_1843200,
@@ -3113,6 +3115,13 @@ static struct pciserial_board pci_boards[] = {
.uart_offset = 0x200,
},
+ [pbn_b0_4_1250000] = {
+ .flags = FL_BASE0,
+ .num_ports = 4,
+ .base_baud = 1250000,
+ .uart_offset = 8,
+ },
+
[pbn_b0_2_1843200] = {
.flags = FL_BASE0,
.num_ports = 2,
@@ -5778,6 +5787,10 @@ static struct pci_device_id serial_pci_tbl[] = {
{ PCI_DEVICE(0x1c29, 0x1108), .driver_data = pbn_fintek_8 },
{ PCI_DEVICE(0x1c29, 0x1112), .driver_data = pbn_fintek_12 },
+ /* MKS Tenta SCOM-080x serial cards */
+ { PCI_DEVICE(0x1601, 0x0800), .driver_data = pbn_b0_4_1250000 },
+ { PCI_DEVICE(0x1601, 0xa801), .driver_data = pbn_b0_4_1250000 },
+
/*
* These entries match devices with class COMMUNICATION_SERIAL,
* COMMUNICATION_MODEM or COMMUNICATION_MULTISERIAL
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index 239bc9cba28c..f54f77037d22 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -644,6 +644,9 @@ static void __unregister_request(struct ceph_mds_client *mdsc,
{
dout("__unregister_request %p tid %lld\n", req, req->r_tid);
+ /* Never leave an unregistered request on an unsafe list! */
+ list_del_init(&req->r_unsafe_item);
+
if (req->r_tid == mdsc->oldest_tid) {
struct rb_node *p = rb_next(&req->r_node);
mdsc->oldest_tid = 0;
@@ -1051,7 +1054,6 @@ static void cleanup_session_requests(struct ceph_mds_client *mdsc,
while (!list_empty(&session->s_unsafe)) {
req = list_first_entry(&session->s_unsafe,
struct ceph_mds_request, r_unsafe_item);
- list_del_init(&req->r_unsafe_item);
pr_warn_ratelimited(" dropping unsafe request %llu\n",
req->r_tid);
__unregister_request(mdsc, req);
@@ -2477,7 +2479,6 @@ static void handle_reply(struct ceph_mds_session *session, struct ceph_msg *msg)
* useful we could do with a revised return value.
*/
dout("got safe reply %llu, mds%d\n", tid, mds);
- list_del_init(&req->r_unsafe_item);
/* last unsafe request during umount? */
if (mdsc->stopping && !__get_oldest_req(mdsc))
diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 509411dd3698..cf644d52c0cf 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -1269,6 +1269,16 @@ out:
return 0;
}
+static void fat_dummy_inode_init(struct inode *inode)
+{
+ /* Initialize this dummy inode to work as no-op. */
+ MSDOS_I(inode)->mmu_private = 0;
+ MSDOS_I(inode)->i_start = 0;
+ MSDOS_I(inode)->i_logstart = 0;
+ MSDOS_I(inode)->i_attrs = 0;
+ MSDOS_I(inode)->i_pos = 0;
+}
+
static int fat_read_root(struct inode *inode)
{
struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb);
@@ -1713,12 +1723,13 @@ int fat_fill_super(struct super_block *sb, void *data, int silent, int isvfat,
fat_inode = new_inode(sb);
if (!fat_inode)
goto out_fail;
- MSDOS_I(fat_inode)->i_pos = 0;
+ fat_dummy_inode_init(fat_inode);
sbi->fat_inode = fat_inode;
fsinfo_inode = new_inode(sb);
if (!fsinfo_inode)
goto out_fail;
+ fat_dummy_inode_init(fsinfo_inode);
fsinfo_inode->i_ino = MSDOS_FSINFO_INO;
sbi->fsinfo_inode = fsinfo_inode;
insert_inode_hash(fsinfo_inode);
diff --git a/fs/mount.h b/fs/mount.h
index 14db05d424f7..3dc7dea5a357 100644
--- a/fs/mount.h
+++ b/fs/mount.h
@@ -86,7 +86,6 @@ static inline int is_mounted(struct vfsmount *mnt)
}
extern struct mount *__lookup_mnt(struct vfsmount *, struct dentry *);
-extern struct mount *__lookup_mnt_last(struct vfsmount *, struct dentry *);
extern int __legitimize_mnt(struct vfsmount *, unsigned);
extern bool legitimize_mnt(struct vfsmount *, unsigned);
diff --git a/fs/namespace.c b/fs/namespace.c
index da98a1bbd8b5..7df3d406d3e0 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -638,28 +638,6 @@ struct mount *__lookup_mnt(struct vfsmount *mnt, struct dentry *dentry)
}
/*
- * find the last mount at @dentry on vfsmount @mnt.
- * mount_lock must be held.
- */
-struct mount *__lookup_mnt_last(struct vfsmount *mnt, struct dentry *dentry)
-{
- struct mount *p, *res = NULL;
- p = __lookup_mnt(mnt, dentry);
- if (!p)
- goto out;
- if (!(p->mnt.mnt_flags & MNT_UMOUNT))
- res = p;
- hlist_for_each_entry_continue(p, mnt_hash) {
- if (&p->mnt_parent->mnt != mnt || p->mnt_mountpoint != dentry)
- break;
- if (!(p->mnt.mnt_flags & MNT_UMOUNT))
- res = p;
- }
-out:
- return res;
-}
-
-/*
* lookup_mnt - Return the first child mount mounted at path
*
* "First" means first mounted chronologically. If you create the
@@ -879,6 +857,13 @@ void mnt_set_mountpoint(struct mount *mnt,
hlist_add_head(&child_mnt->mnt_mp_list, &mp->m_list);
}
+static void __attach_mnt(struct mount *mnt, struct mount *parent)
+{
+ hlist_add_head_rcu(&mnt->mnt_hash,
+ m_hash(&parent->mnt, mnt->mnt_mountpoint));
+ list_add_tail(&mnt->mnt_child, &parent->mnt_mounts);
+}
+
/*
* vfsmount lock must be held for write
*/
@@ -887,28 +872,45 @@ static void attach_mnt(struct mount *mnt,
struct mountpoint *mp)
{
mnt_set_mountpoint(parent, mp, mnt);
- hlist_add_head_rcu(&mnt->mnt_hash, m_hash(&parent->mnt, mp->m_dentry));
- list_add_tail(&mnt->mnt_child, &parent->mnt_mounts);
+ __attach_mnt(mnt, parent);
}
-static void attach_shadowed(struct mount *mnt,
- struct mount *parent,
- struct mount *shadows)
+void mnt_change_mountpoint(struct mount *parent, struct mountpoint *mp, struct mount *mnt)
{
- if (shadows) {
- hlist_add_behind_rcu(&mnt->mnt_hash, &shadows->mnt_hash);
- list_add(&mnt->mnt_child, &shadows->mnt_child);
- } else {
- hlist_add_head_rcu(&mnt->mnt_hash,
- m_hash(&parent->mnt, mnt->mnt_mountpoint));
- list_add_tail(&mnt->mnt_child, &parent->mnt_mounts);
- }
+ struct mountpoint *old_mp = mnt->mnt_mp;
+ struct dentry *old_mountpoint = mnt->mnt_mountpoint;
+ struct mount *old_parent = mnt->mnt_parent;
+
+ list_del_init(&mnt->mnt_child);
+ hlist_del_init(&mnt->mnt_mp_list);
+ hlist_del_init_rcu(&mnt->mnt_hash);
+
+ attach_mnt(mnt, parent, mp);
+
+ put_mountpoint(old_mp);
+
+ /*
+ * Safely avoid even the suggestion this code might sleep or
+ * lock the mount hash by taking advantage of the knowledge that
+ * mnt_change_mountpoint will not release the final reference
+ * to a mountpoint.
+ *
+ * During mounting, the mount passed in as the parent mount will
+ * continue to use the old mountpoint and during unmounting, the
+ * old mountpoint will continue to exist until namespace_unlock,
+ * which happens well after mnt_change_mountpoint.
+ */
+ spin_lock(&old_mountpoint->d_lock);
+ old_mountpoint->d_lockref.count--;
+ spin_unlock(&old_mountpoint->d_lock);
+
+ mnt_add_count(old_parent, -1);
}
/*
* vfsmount lock must be held for write
*/
-static void commit_tree(struct mount *mnt, struct mount *shadows)
+static void commit_tree(struct mount *mnt)
{
struct mount *parent = mnt->mnt_parent;
struct mount *m;
@@ -923,7 +925,7 @@ static void commit_tree(struct mount *mnt, struct mount *shadows)
list_splice(&head, n->list.prev);
- attach_shadowed(mnt, parent, shadows);
+ __attach_mnt(mnt, parent);
touch_mnt_namespace(n);
}
@@ -1718,7 +1720,6 @@ struct mount *copy_tree(struct mount *mnt, struct dentry *dentry,
continue;
for (s = r; s; s = next_mnt(s, r)) {
- struct mount *t = NULL;
if (!(flag & CL_COPY_UNBINDABLE) &&
IS_MNT_UNBINDABLE(s)) {
s = skip_mnt_tree(s);
@@ -1740,14 +1741,7 @@ struct mount *copy_tree(struct mount *mnt, struct dentry *dentry,
goto out;
lock_mount_hash();
list_add_tail(&q->mnt_list, &res->mnt_list);
- mnt_set_mountpoint(parent, p->mnt_mp, q);
- if (!list_empty(&parent->mnt_mounts)) {
- t = list_last_entry(&parent->mnt_mounts,
- struct mount, mnt_child);
- if (t->mnt_mp != p->mnt_mp)
- t = NULL;
- }
- attach_shadowed(q, parent, t);
+ attach_mnt(q, parent, p->mnt_mp);
unlock_mount_hash();
}
}
@@ -1925,10 +1919,18 @@ static int attach_recursive_mnt(struct mount *source_mnt,
struct path *parent_path)
{
HLIST_HEAD(tree_list);
+ struct mountpoint *smp;
struct mount *child, *p;
struct hlist_node *n;
int err;
+ /* Preallocate a mountpoint in case the new mounts need
+ * to be tucked under other mounts.
+ */
+ smp = get_mountpoint(source_mnt->mnt.mnt_root);
+ if (IS_ERR(smp))
+ return PTR_ERR(smp);
+
if (IS_MNT_SHARED(dest_mnt)) {
err = invent_group_ids(source_mnt, true);
if (err)
@@ -1948,16 +1950,19 @@ static int attach_recursive_mnt(struct mount *source_mnt,
touch_mnt_namespace(source_mnt->mnt_ns);
} else {
mnt_set_mountpoint(dest_mnt, dest_mp, source_mnt);
- commit_tree(source_mnt, NULL);
+ commit_tree(source_mnt);
}
hlist_for_each_entry_safe(child, n, &tree_list, mnt_hash) {
struct mount *q;
hlist_del_init(&child->mnt_hash);
- q = __lookup_mnt_last(&child->mnt_parent->mnt,
- child->mnt_mountpoint);
- commit_tree(child, q);
+ q = __lookup_mnt(&child->mnt_parent->mnt,
+ child->mnt_mountpoint);
+ if (q)
+ mnt_change_mountpoint(child, smp, q);
+ commit_tree(child);
}
+ put_mountpoint(smp);
unlock_mount_hash();
return 0;
@@ -1970,6 +1975,10 @@ static int attach_recursive_mnt(struct mount *source_mnt,
unlock_mount_hash();
cleanup_group_ids(source_mnt, NULL);
out:
+ read_seqlock_excl(&mount_lock);
+ put_mountpoint(smp);
+ read_sequnlock_excl(&mount_lock);
+
return err;
}
diff --git a/fs/pnode.c b/fs/pnode.c
index 99899705b105..b9f2af59b9a6 100644
--- a/fs/pnode.c
+++ b/fs/pnode.c
@@ -324,6 +324,21 @@ out:
return ret;
}
+static struct mount *find_topper(struct mount *mnt)
+{
+ /* If there is exactly one mount covering mnt completely return it. */
+ struct mount *child;
+
+ if (!list_is_singular(&mnt->mnt_mounts))
+ return NULL;
+
+ child = list_first_entry(&mnt->mnt_mounts, struct mount, mnt_child);
+ if (child->mnt_mountpoint != mnt->mnt.mnt_root)
+ return NULL;
+
+ return child;
+}
+
/*
* return true if the refcount is greater than count
*/
@@ -344,9 +359,8 @@ static inline int do_refcount_check(struct mount *mnt, int count)
*/
int propagate_mount_busy(struct mount *mnt, int refcnt)
{
- struct mount *m, *child;
+ struct mount *m, *child, *topper;
struct mount *parent = mnt->mnt_parent;
- int ret = 0;
if (mnt == parent)
return do_refcount_check(mnt, refcnt);
@@ -361,12 +375,24 @@ int propagate_mount_busy(struct mount *mnt, int refcnt)
for (m = propagation_next(parent, parent); m;
m = propagation_next(m, parent)) {
- child = __lookup_mnt_last(&m->mnt, mnt->mnt_mountpoint);
- if (child && list_empty(&child->mnt_mounts) &&
- (ret = do_refcount_check(child, 1)))
- break;
+ int count = 1;
+ child = __lookup_mnt(&m->mnt, mnt->mnt_mountpoint);
+ if (!child)
+ continue;
+
+ /* Is there exactly one mount on the child that covers
+ * it completely whose reference should be ignored?
+ */
+ topper = find_topper(child);
+ if (topper)
+ count += 1;
+ else if (!list_empty(&child->mnt_mounts))
+ continue;
+
+ if (do_refcount_check(child, count))
+ return 1;
}
- return ret;
+ return 0;
}
/*
@@ -383,7 +409,7 @@ void propagate_mount_unlock(struct mount *mnt)
for (m = propagation_next(parent, parent); m;
m = propagation_next(m, parent)) {
- child = __lookup_mnt_last(&m->mnt, mnt->mnt_mountpoint);
+ child = __lookup_mnt(&m->mnt, mnt->mnt_mountpoint);
if (child)
child->mnt.mnt_flags &= ~MNT_LOCKED;
}
@@ -401,9 +427,11 @@ static void mark_umount_candidates(struct mount *mnt)
for (m = propagation_next(parent, parent); m;
m = propagation_next(m, parent)) {
- struct mount *child = __lookup_mnt_last(&m->mnt,
+ struct mount *child = __lookup_mnt(&m->mnt,
mnt->mnt_mountpoint);
- if (child && (!IS_MNT_LOCKED(child) || IS_MNT_MARKED(m))) {
+ if (!child || (child->mnt.mnt_flags & MNT_UMOUNT))
+ continue;
+ if (!IS_MNT_LOCKED(child) || IS_MNT_MARKED(m)) {
SET_MNT_MARK(child);
}
}
@@ -422,8 +450,8 @@ static void __propagate_umount(struct mount *mnt)
for (m = propagation_next(parent, parent); m;
m = propagation_next(m, parent)) {
-
- struct mount *child = __lookup_mnt_last(&m->mnt,
+ struct mount *topper;
+ struct mount *child = __lookup_mnt(&m->mnt,
mnt->mnt_mountpoint);
/*
* umount the child only if the child has no children
@@ -432,6 +460,15 @@ static void __propagate_umount(struct mount *mnt)
if (!child || !IS_MNT_MARKED(child))
continue;
CLEAR_MNT_MARK(child);
+
+ /* If there is exactly one mount covering all of child
+ * replace child with that mount.
+ */
+ topper = find_topper(child);
+ if (topper)
+ mnt_change_mountpoint(child->mnt_parent, child->mnt_mp,
+ topper);
+
if (list_empty(&child->mnt_mounts)) {
list_del_init(&child->mnt_child);
child->mnt.mnt_flags |= MNT_UMOUNT;
diff --git a/fs/pnode.h b/fs/pnode.h
index 0fcdbe7ca648..623f01772bec 100644
--- a/fs/pnode.h
+++ b/fs/pnode.h
@@ -49,6 +49,8 @@ int get_dominating_id(struct mount *mnt, const struct path *root);
unsigned int mnt_get_count(struct mount *mnt);
void mnt_set_mountpoint(struct mount *, struct mountpoint *,
struct mount *);
+void mnt_change_mountpoint(struct mount *parent, struct mountpoint *mp,
+ struct mount *mnt);
struct mount *copy_tree(struct mount *, struct dentry *, int);
bool is_path_reachable(struct mount *, struct dentry *,
const struct path *root);
diff --git a/include/linux/ceph/osdmap.h b/include/linux/ceph/osdmap.h
index e55c08bc3a96..0abc56140c83 100644
--- a/include/linux/ceph/osdmap.h
+++ b/include/linux/ceph/osdmap.h
@@ -49,7 +49,7 @@ static inline bool ceph_can_shift_osds(struct ceph_pg_pool_info *pool)
case CEPH_POOL_TYPE_EC:
return false;
default:
- BUG_ON(1);
+ BUG();
}
}
diff --git a/include/linux/lockd/lockd.h b/include/linux/lockd/lockd.h
index c15373894a42..b37dee3acaba 100644
--- a/include/linux/lockd/lockd.h
+++ b/include/linux/lockd/lockd.h
@@ -355,7 +355,8 @@ static inline int nlm_privileged_requester(const struct svc_rqst *rqstp)
static inline int nlm_compare_locks(const struct file_lock *fl1,
const struct file_lock *fl2)
{
- return fl1->fl_pid == fl2->fl_pid
+ return file_inode(fl1->fl_file) == file_inode(fl2->fl_file)
+ && fl1->fl_pid == fl2->fl_pid
&& fl1->fl_owner == fl2->fl_owner
&& fl1->fl_start == fl2->fl_start
&& fl1->fl_end == fl2->fl_end
diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h
index 800fe16cc36f..ed66414b91f0 100644
--- a/include/target/target_core_base.h
+++ b/include/target/target_core_base.h
@@ -740,6 +740,7 @@ struct se_lun {
struct config_group lun_group;
struct se_port_stat_grps port_stat_grps;
struct completion lun_ref_comp;
+ struct completion lun_shutdown_comp;
struct percpu_ref lun_ref;
struct list_head lun_dev_link;
struct hlist_node link;
diff --git a/net/mac80211/pm.c b/net/mac80211/pm.c
index 00a43a70e1fc..0402fa45b343 100644
--- a/net/mac80211/pm.c
+++ b/net/mac80211/pm.c
@@ -168,6 +168,7 @@ int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
break;
}
+ flush_delayed_work(&sdata->dec_tailroom_needed_wk);
drv_remove_interface(local, sdata);
}
diff --git a/tools/testing/ktest/ktest.pl b/tools/testing/ktest/ktest.pl
index d08e214ec6e7..223d88e25e05 100755
--- a/tools/testing/ktest/ktest.pl
+++ b/tools/testing/ktest/ktest.pl
@@ -2629,7 +2629,7 @@ sub do_run_test {
}
waitpid $child_pid, 0;
- $child_exit = $?;
+ $child_exit = $? >> 8;
my $end_time = time;
$test_time = $end_time - $start_time;
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