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SCSI fixes on 20160408 

This is a set of 8 fixes.  Two are trivial gcc-6 updates (brace
 additions and unused variable removal).  There's a couple of cxlflash
 regressions, a correction for sd being overly chatty on revalidation
 (causing excess log increases).  A VPD issue which could crash USB
 devices because they seem very intolerant to VPD inquiries, an ALUA
 deadlock fix and a mpt3sas buffer overrun fix.
 
 Signed-off-by: James Bottomley <jejb@linux.vnet.ibm.com>
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Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "This is a set of eight fixes.

  Two are trivial gcc-6 updates (brace additions and unused variable
  removal).  There's a couple of cxlflash regressions, a correction for
  sd being overly chatty on revalidation (causing excess log increases).
  A VPD issue which could crash USB devices because they seem very
  intolerant to VPD inquiries, an ALUA deadlock fix and a mpt3sas buffer
  overrun fix"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: Do not attach VPD to devices that don't support it
  sd: Fix excessive capacity printing on devices with blocks bigger than 512 bytes
  scsi_dh_alua: Fix a recently introduced deadlock
  scsi: Declare local symbols static
  cxlflash: Move to exponential back-off when cmd_room is not available
  cxlflash: Fix regression issue with re-ordering patch
  mpt3sas: Don't overreach ioc->reply_post[] during initialization
  aacraid: add missing curly braces
This commit is contained in:
Linus Torvalds 2016-04-09 12:00:42 -07:00
parent 63b106a87d 6ea7e3873e
commit fb41b4be00
10 changed files with 164 additions and 109 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/scsi/aacraid/linit.c
View File

@ -452,10 +452,11 @@ static int aac_slave_configure(struct scsi_device *sdev)
else if (depth < 2)
depth = 2;
scsi_change_queue_depth(sdev, depth);
} else
} else {
scsi_change_queue_depth(sdev, 1);
sdev->tagged_supported = 1;
}
return 0;
}

138
drivers/scsi/cxlflash/main.c
View File

@ -289,7 +289,7 @@ static void context_reset(struct afu_cmd *cmd)
atomic64_set(&afu->room, room);
if (room)
goto write_rrin;
udelay(nretry);
udelay(1 << nretry);
} while (nretry++ < MC_ROOM_RETRY_CNT);
pr_err("%s: no cmd_room to send reset\n", __func__);
@ -303,7 +303,7 @@ write_rrin:
if (rrin != 0x1)
break;
/* Double delay each time */
udelay(2 << nretry);
udelay(1 << nretry);
} while (nretry++ < MC_ROOM_RETRY_CNT);
}
@ -338,7 +338,7 @@ retry:
atomic64_set(&afu->room, room);
if (room)
goto write_ioarrin;
udelay(nretry);
udelay(1 << nretry);
} while (nretry++ < MC_ROOM_RETRY_CNT);
dev_err(dev, "%s: no cmd_room to send 0x%X\n",
@ -352,7 +352,7 @@ retry:
* afu->room.
*/
if (nretry++ < MC_ROOM_RETRY_CNT) {
udelay(nretry);
udelay(1 << nretry);
goto retry;
}
@ -683,28 +683,23 @@ static void stop_afu(struct cxlflash_cfg *cfg)
}
/**
* term_mc() - terminates the master context
* term_intr() - disables all AFU interrupts
* @cfg: Internal structure associated with the host.
* @level: Depth of allocation, where to begin waterfall tear down.
*
* Safe to call with AFU/MC in partially allocated/initialized state.
*/
static void term_mc(struct cxlflash_cfg *cfg, enum undo_level level)
static void term_intr(struct cxlflash_cfg *cfg, enum undo_level level)
{
int rc = 0;
struct afu *afu = cfg->afu;
struct device *dev = &cfg->dev->dev;
if (!afu || !cfg->mcctx) {
dev_err(dev, "%s: returning from term_mc with NULL afu or MC\n",
__func__);
dev_err(dev, "%s: returning with NULL afu or MC\n", __func__);
return;
}
switch (level) {
case UNDO_START:
rc = cxl_stop_context(cfg->mcctx);
BUG_ON(rc);
case UNMAP_THREE:
cxl_unmap_afu_irq(cfg->mcctx, 3, afu);
case UNMAP_TWO:
@ -713,11 +708,36 @@ static void term_mc(struct cxlflash_cfg *cfg, enum undo_level level)
cxl_unmap_afu_irq(cfg->mcctx, 1, afu);
case FREE_IRQ:
cxl_free_afu_irqs(cfg->mcctx);
case RELEASE_CONTEXT:
cfg->mcctx = NULL;
/* fall through */
case UNDO_NOOP:
/* No action required */
break;
}
}
/**
* term_mc() - terminates the master context
* @cfg: Internal structure associated with the host.
* @level: Depth of allocation, where to begin waterfall tear down.
*
* Safe to call with AFU/MC in partially allocated/initialized state.
*/
static void term_mc(struct cxlflash_cfg *cfg)
{
int rc = 0;
struct afu *afu = cfg->afu;
struct device *dev = &cfg->dev->dev;
if (!afu || !cfg->mcctx) {
dev_err(dev, "%s: returning with NULL afu or MC\n", __func__);
return;
}
rc = cxl_stop_context(cfg->mcctx);
WARN_ON(rc);
cfg->mcctx = NULL;
}
/**
* term_afu() - terminates the AFU
* @cfg: Internal structure associated with the host.
@ -726,10 +746,20 @@ static void term_mc(struct cxlflash_cfg *cfg, enum undo_level level)
*/
static void term_afu(struct cxlflash_cfg *cfg)
{
/*
* Tear down is carefully orchestrated to ensure
* no interrupts can come in when the problem state
* area is unmapped.
*
* 1) Disable all AFU interrupts
* 2) Unmap the problem state area
* 3) Stop the master context
*/
term_intr(cfg, UNMAP_THREE);
if (cfg->afu)
stop_afu(cfg);
term_mc(cfg, UNDO_START);
term_mc(cfg);
pr_debug("%s: returning\n", __func__);
}
@ -1597,41 +1627,24 @@ static int start_afu(struct cxlflash_cfg *cfg)
}
/**
* init_mc() - create and register as the master context
* init_intr() - setup interrupt handlers for the master context
* @cfg: Internal structure associated with the host.
*
* Return: 0 on success, -errno on failure
*/
static int init_mc(struct cxlflash_cfg *cfg)
static enum undo_level init_intr(struct cxlflash_cfg *cfg,
struct cxl_context *ctx)
{
struct cxl_context *ctx;
struct device *dev = &cfg->dev->dev;
struct afu *afu = cfg->afu;
struct device *dev = &cfg->dev->dev;
int rc = 0;
enum undo_level level;
ctx = cxl_get_context(cfg->dev);
if (unlikely(!ctx))
return -ENOMEM;
cfg->mcctx = ctx;
/* Set it up as a master with the CXL */
cxl_set_master(ctx);
/* During initialization reset the AFU to start from a clean slate */
rc = cxl_afu_reset(cfg->mcctx);
if (unlikely(rc)) {
dev_err(dev, "%s: initial AFU reset failed rc=%d\n",
__func__, rc);
level = RELEASE_CONTEXT;
goto out;
}
enum undo_level level = UNDO_NOOP;
rc = cxl_allocate_afu_irqs(ctx, 3);
if (unlikely(rc)) {
dev_err(dev, "%s: call to allocate_afu_irqs failed rc=%d!\n",
__func__, rc);
level = RELEASE_CONTEXT;
level = UNDO_NOOP;
goto out;
}
@ -1661,8 +1674,47 @@ static int init_mc(struct cxlflash_cfg *cfg)
level = UNMAP_TWO;
goto out;
}
out:
return level;
}
rc = 0;
/**
* init_mc() - create and register as the master context
* @cfg: Internal structure associated with the host.
*
* Return: 0 on success, -errno on failure
*/
static int init_mc(struct cxlflash_cfg *cfg)
{
struct cxl_context *ctx;
struct device *dev = &cfg->dev->dev;
int rc = 0;
enum undo_level level;
ctx = cxl_get_context(cfg->dev);
if (unlikely(!ctx)) {
rc = -ENOMEM;
goto ret;
}
cfg->mcctx = ctx;
/* Set it up as a master with the CXL */
cxl_set_master(ctx);
/* During initialization reset the AFU to start from a clean slate */
rc = cxl_afu_reset(cfg->mcctx);
if (unlikely(rc)) {
dev_err(dev, "%s: initial AFU reset failed rc=%d\n",
__func__, rc);
goto ret;
}
level = init_intr(cfg, ctx);
if (unlikely(level)) {
dev_err(dev, "%s: setting up interrupts failed rc=%d\n",
__func__, rc);
goto out;
}
/* This performs the equivalent of the CXL_IOCTL_START_WORK.
* The CXL_IOCTL_GET_PROCESS_ELEMENT is implicit in the process
@ -1678,7 +1730,7 @@ ret:
pr_debug("%s: returning rc=%d\n", __func__, rc);
return rc;
out:
term_mc(cfg, level);
term_intr(cfg, level);
goto ret;
}
@ -1751,7 +1803,8 @@ out:
err2:
kref_put(&afu->mapcount, afu_unmap);
err1:
term_mc(cfg, UNDO_START);
term_intr(cfg, UNMAP_THREE);
term_mc(cfg);
goto out;
}
@ -2488,8 +2541,7 @@ static pci_ers_result_t cxlflash_pci_error_detected(struct pci_dev *pdev,
if (unlikely(rc))
dev_err(dev, "%s: Failed to mark user contexts!(%d)\n",
__func__, rc);
stop_afu(cfg);
term_mc(cfg, UNDO_START);
term_afu(cfg);
return PCI_ERS_RESULT_NEED_RESET;
case pci_channel_io_perm_failure:
cfg->state = STATE_FAILTERM;

5
drivers/scsi/cxlflash/main.h
View File

@ -79,12 +79,11 @@
#define WWPN_BUF_LEN (WWPN_LEN + 1)
enum undo_level {
RELEASE_CONTEXT = 0,
UNDO_NOOP = 0,
FREE_IRQ,
UNMAP_ONE,
UNMAP_TWO,
UNMAP_THREE,
UNDO_START
UNMAP_THREE
};
struct dev_dependent_vals {

4
drivers/scsi/device_handler/scsi_dh_alua.c
View File

@ -1112,9 +1112,9 @@ static void alua_bus_detach(struct scsi_device *sdev)
h->sdev = NULL;
spin_unlock(&h->pg_lock);
if (pg) {
spin_lock(&pg->lock);
spin_lock_irq(&pg->lock);
list_del_rcu(&h->node);
spin_unlock(&pg->lock);
spin_unlock_irq(&pg->lock);
kref_put(&pg->kref, release_port_group);
}
sdev->handler_data = NULL;

33
drivers/scsi/mpt3sas/mpt3sas_base.c
View File

@ -5030,7 +5030,7 @@ _base_make_ioc_ready(struct MPT3SAS_ADAPTER *ioc, int sleep_flag,
static int
_base_make_ioc_operational(struct MPT3SAS_ADAPTER *ioc, int sleep_flag)
{
int r, i;
int r, i, index;
unsigned long flags;
u32 reply_address;
u16 smid;
@ -5039,8 +5039,7 @@ _base_make_ioc_operational(struct MPT3SAS_ADAPTER *ioc, int sleep_flag)
struct _event_ack_list *delayed_event_ack, *delayed_event_ack_next;
u8 hide_flag;
struct adapter_reply_queue *reply_q;
long reply_post_free;
u32 reply_post_free_sz, index = 0;
Mpi2ReplyDescriptorsUnion_t *reply_post_free_contig;
dinitprintk(ioc, pr_info(MPT3SAS_FMT "%s\n", ioc->name,
__func__));
@ -5124,27 +5123,27 @@ _base_make_ioc_operational(struct MPT3SAS_ADAPTER *ioc, int sleep_flag)
_base_assign_reply_queues(ioc);
/* initialize Reply Post Free Queue */
reply_post_free_sz = ioc->reply_post_queue_depth *
sizeof(Mpi2DefaultReplyDescriptor_t);
reply_post_free = (long)ioc->reply_post[index].reply_post_free;
index = 0;
reply_post_free_contig = ioc->reply_post[0].reply_post_free;
list_for_each_entry(reply_q, &ioc->reply_queue_list, list) {
/*
* If RDPQ is enabled, switch to the next allocation.
* Otherwise advance within the contiguous region.
*/
if (ioc->rdpq_array_enable) {
reply_q->reply_post_free =
ioc->reply_post[index++].reply_post_free;
} else {
reply_q->reply_post_free = reply_post_free_contig;
reply_post_free_contig += ioc->reply_post_queue_depth;
}
reply_q->reply_post_host_index = 0;
reply_q->reply_post_free = (Mpi2ReplyDescriptorsUnion_t *)
reply_post_free;
for (i = 0; i < ioc->reply_post_queue_depth; i++)
reply_q->reply_post_free[i].Words =
cpu_to_le64(ULLONG_MAX);
if (!_base_is_controller_msix_enabled(ioc))
goto skip_init_reply_post_free_queue;
/*
* If RDPQ is enabled, switch to the next allocation.
* Otherwise advance within the contiguous region.
*/
if (ioc->rdpq_array_enable)
reply_post_free = (long)
ioc->reply_post[++index].reply_post_free;
else
reply_post_free += reply_post_free_sz;
}
skip_init_reply_post_free_queue:

3
drivers/scsi/scsi.c
View File

@ -784,8 +784,9 @@ void scsi_attach_vpd(struct scsi_device *sdev)
int pg83_supported = 0;
unsigned char __rcu *vpd_buf, *orig_vpd_buf = NULL;
if (sdev->skip_vpd_pages)
if (!scsi_device_supports_vpd(sdev))
return;
retry_pg0:
vpd_buf = kmalloc(vpd_len, GFP_KERNEL);
if (!vpd_buf)

8
drivers/scsi/scsi_sysfs.c
View File

@ -81,6 +81,7 @@ const char *scsi_host_state_name(enum scsi_host_state state)
return name;
}
#ifdef CONFIG_SCSI_DH
static const struct {
unsigned char value;
char *name;
@ -94,7 +95,7 @@ static const struct {
{ SCSI_ACCESS_STATE_TRANSITIONING, "transitioning" },
};
const char *scsi_access_state_name(unsigned char state)
static const char *scsi_access_state_name(unsigned char state)
{
int i;
char *name = NULL;
@ -107,6 +108,7 @@ const char *scsi_access_state_name(unsigned char state)
}
return name;
}
#endif
static int check_set(unsigned long long *val, char *src)
{
@ -226,7 +228,7 @@ show_shost_state(struct device *dev, struct device_attribute *attr, char *buf)
}
/* DEVICE_ATTR(state) clashes with dev_attr_state for sdev */
struct device_attribute dev_attr_hstate =
static struct device_attribute dev_attr_hstate =
__ATTR(state, S_IRUGO | S_IWUSR, show_shost_state, store_shost_state);
static ssize_t
@ -401,7 +403,7 @@ static struct attribute *scsi_sysfs_shost_attrs[] = {
NULL
};
struct attribute_group scsi_shost_attr_group = {
static struct attribute_group scsi_shost_attr_group = {
.attrs = scsi_sysfs_shost_attrs,
};

41
drivers/scsi/sd.c
View File

@ -1275,18 +1275,19 @@ static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk);
struct scsi_device *sdp = sdkp->device;
struct Scsi_Host *host = sdp->host;
sector_t capacity = logical_to_sectors(sdp, sdkp->capacity);
int diskinfo[4];
/* default to most commonly used values */
diskinfo[0] = 0x40; /* 1 << 6 */
diskinfo[1] = 0x20; /* 1 << 5 */
diskinfo[2] = sdkp->capacity >> 11;
diskinfo[2] = capacity >> 11;
/* override with calculated, extended default, or driver values */
if (host->hostt->bios_param)
host->hostt->bios_param(sdp, bdev, sdkp->capacity, diskinfo);
host->hostt->bios_param(sdp, bdev, capacity, diskinfo);
else
scsicam_bios_param(bdev, sdkp->capacity, diskinfo);
scsicam_bios_param(bdev, capacity, diskinfo);
geo->heads = diskinfo[0];
geo->sectors = diskinfo[1];
@ -2337,14 +2338,6 @@ got_data:
if (sdkp->capacity > 0xffffffff)
sdp->use_16_for_rw = 1;
/* Rescale capacity to 512-byte units */
if (sector_size == 4096)
sdkp->capacity <<= 3;
else if (sector_size == 2048)
sdkp->capacity <<= 2;
else if (sector_size == 1024)
sdkp->capacity <<= 1;
blk_queue_physical_block_size(sdp->request_queue,
sdkp->physical_block_size);
sdkp->device->sector_size = sector_size;
@ -2795,28 +2788,6 @@ static void sd_read_write_same(struct scsi_disk *sdkp, unsigned char *buffer)
sdkp->ws10 = 1;
}
static int sd_try_extended_inquiry(struct scsi_device *sdp)
{
/* Attempt VPD inquiry if the device blacklist explicitly calls
* for it.
*/
if (sdp->try_vpd_pages)
return 1;
/*
* Although VPD inquiries can go to SCSI-2 type devices,
* some USB ones crash on receiving them, and the pages
* we currently ask for are for SPC-3 and beyond
*/
if (sdp->scsi_level > SCSI_SPC_2 && !sdp->skip_vpd_pages)
return 1;
return 0;
}
static inline u32 logical_to_sectors(struct scsi_device *sdev, u32 blocks)
{
return blocks << (ilog2(sdev->sector_size) - 9);
}
/**
* sd_revalidate_disk - called the first time a new disk is seen,
* performs disk spin up, read_capacity, etc.
@ -2856,7 +2827,7 @@ static int sd_revalidate_disk(struct gendisk *disk)
if (sdkp->media_present) {
sd_read_capacity(sdkp, buffer);
if (sd_try_extended_inquiry(sdp)) {
if (scsi_device_supports_vpd(sdp)) {
sd_read_block_provisioning(sdkp);
sd_read_block_limits(sdkp);
sd_read_block_characteristics(sdkp);
@ -2900,7 +2871,7 @@ static int sd_revalidate_disk(struct gendisk *disk)
/* Combine with controller limits */
q->limits.max_sectors = min(rw_max, queue_max_hw_sectors(q));
set_capacity(disk, sdkp->capacity);
set_capacity(disk, logical_to_sectors(sdp, sdkp->capacity));
sd_config_write_same(sdkp);
kfree(buffer);

7
drivers/scsi/sd.h
View File

@ -65,7 +65,7 @@ struct scsi_disk {
struct device dev;
struct gendisk *disk;
atomic_t openers;
sector_t capacity; /* size in 512-byte sectors */
sector_t capacity; /* size in logical blocks */
u32 max_xfer_blocks;
u32 opt_xfer_blocks;
u32 max_ws_blocks;
@ -146,6 +146,11 @@ static inline int scsi_medium_access_command(struct scsi_cmnd *scmd)
return 0;
}
static inline sector_t logical_to_sectors(struct scsi_device *sdev, sector_t blocks)
{
return blocks << (ilog2(sdev->sector_size) - 9);
}
/*
* A DIF-capable target device can be formatted with different
* protection schemes. Currently 0 through 3 are defined:

25
include/scsi/scsi_device.h
View File

@ -516,6 +516,31 @@ static inline int scsi_device_tpgs(struct scsi_device *sdev)
return sdev->inquiry ? (sdev->inquiry[5] >> 4) & 0x3 : 0;
}
/**
* scsi_device_supports_vpd - test if a device supports VPD pages
* @sdev: the &struct scsi_device to test
*
* If the 'try_vpd_pages' flag is set it takes precedence.
* Otherwise we will assume VPD pages are supported if the
* SCSI level is at least SPC-3 and 'skip_vpd_pages' is not set.
*/
static inline int scsi_device_supports_vpd(struct scsi_device *sdev)
{
/* Attempt VPD inquiry if the device blacklist explicitly calls
* for it.
*/
if (sdev->try_vpd_pages)
return 1;
/*
* Although VPD inquiries can go to SCSI-2 type devices,
* some USB ones crash on receiving them, and the pages
* we currently ask for are for SPC-3 and beyond
*/
if (sdev->scsi_level > SCSI_SPC_2 && !sdev->skip_vpd_pages)
return 1;
return 0;
}
#define MODULE_ALIAS_SCSI_DEVICE(type) \
MODULE_ALIAS("scsi:t-" __stringify(type) "*")
#define SCSI_DEVICE_MODALIAS_FMT "scsi:t-0x%02x"