29 Dec, 2018
1 commit
-
Pull SCSI updates from James Bottomley:
"This is mostly update of the usual drivers: smarpqi, lpfc, qedi,
megaraid_sas, libsas, zfcp, mpt3sas, hisi_sas.Additionally, we have a pile of annotation, unused variable and minor
updates.The big API change is the updates for Christoph's DMA rework which
include removing the DISABLE_CLUSTERING flag.And finally there are a couple of target tree updates"
* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (259 commits)
scsi: isci: request: mark expected switch fall-through
scsi: isci: remote_node_context: mark expected switch fall-throughs
scsi: isci: remote_device: Mark expected switch fall-throughs
scsi: isci: phy: Mark expected switch fall-through
scsi: iscsi: Capture iscsi debug messages using tracepoints
scsi: myrb: Mark expected switch fall-throughs
scsi: megaraid: fix out-of-bound array accesses
scsi: mpt3sas: mpt3sas_scsih: Mark expected switch fall-through
scsi: fcoe: remove set but not used variable 'port'
scsi: smartpqi: call pqi_free_interrupts() in pqi_shutdown()
scsi: smartpqi: fix build warnings
scsi: smartpqi: update driver version
scsi: smartpqi: add ofa support
scsi: smartpqi: increase fw status register read timeout
scsi: smartpqi: bump driver version
scsi: smartpqi: add smp_utils support
scsi: smartpqi: correct lun reset issues
scsi: smartpqi: correct volume status
scsi: smartpqi: do not offline disks for transient did no connect conditions
scsi: smartpqi: allow for larger raid maps
...
19 Dec, 2018
2 commits
-
The same effects can be achieved by setting the dma_boundary to
PAGE_SIZE - 1 and the max_segment_size to PAGE_SIZE, so shift those
settings into the drivers. Note that in many cases the setting might
be bogus, but this keeps the status quo.[mkp: fix myrs and myrb]
Signed-off-by: Christoph Hellwig
Signed-off-by: Martin K. Petersen -
This allows the host driver to indicate the maximum supported
segment size in a nice an easy way, so that the driver doesn't
have to worry about DMA-layer imposed limitations.Signed-off-by: Christoph Hellwig
Reviewed-by: Bart Van Assche
Signed-off-by: Martin K. Petersen
08 Nov, 2018
1 commit
-
This removes the legacy (non-mq) IO path for SCSI.
Cc: linux-scsi@vger.kernel.org
Acked-by: Himanshu Madhani
Reviewed-by: Hannes Reinecke
Tested-by: Ming Lei
Reviewed-by: Omar Sandoval
Acked-by: Martin K. Petersen
Signed-off-by: Jens Axboe
28 Aug, 2018
1 commit
-
This reverts commit 328728630d9f2bf14b82ca30b5e47489beefe361.
There is fundamental issue in commit 328728630d9f2bf1 (scsi: core: avoid
host-wide host_busy counter for scsi_mq) because SCSI's host busy counter
may not be same with counter of blk-mq's inflight tags, especially in case
of none io scheduler.We may switch to other approach for addressing this scsi_mq's performance
issue, such as percpu counter or kind of ways, so revert this commit first
for fixing this kind of issue in EH path, as reported by Jens.Cc: Omar Sandoval ,
Cc: "Martin K. Petersen" ,
Cc: James Bottomley ,
Cc: Christoph Hellwig ,
Cc: Don Brace
Cc: Kashyap Desai
Cc: Mike Snitzer
Cc: Hannes Reinecke
Cc: Laurence Oberman
Cc: Bart Van Assche
Cc: Jens Axboe
Reported-by: Jens Axboe
Signed-off-by: Ming Lei
Signed-off-by: Martin K. Petersen
27 Jun, 2018
2 commits
-
It isn't necessary to check the host depth in scsi_queue_rq() any more
since it has been respected by blk-mq before calling scsi_queue_rq() via
getting driver tag.Lots of LUNs may attach to same host and per-host IOPS may reach millions,
so we should avoid expensive atomic operations on the host-wide counter in
the IO path.This patch implements scsi_host_busy() via blk_mq_tagset_busy_iter() for
reading the count of busy IOs for scsi_mq.It is observed that IOPS is increased by 15% in IO test on scsi_debug (32
LUNs, 32 submit queues, 1024 can_queue, libaio/dio) in a dual-socket
system.[mkp: clarified commit message]
Cc: Omar Sandoval ,
Cc: "Martin K. Petersen" ,
Cc: James Bottomley ,
Cc: Christoph Hellwig ,
Cc: Don Brace
Cc: Kashyap Desai
Cc: Mike Snitzer
Cc: Hannes Reinecke
Cc: Laurence Oberman
Cc: Bart Van Assche
Signed-off-by: Ming Lei
Reviewed-by: Bart Van Assche
Signed-off-by: Martin K. Petersen -
No functional change.
Just introduce scsi_host_busy() and replace the direct read of
scsi_host->host_busy with this new API.Cc: Omar Sandoval ,
Cc: "Martin K. Petersen" ,
Cc: James Bottomley ,
Cc: Christoph Hellwig ,
Cc: Don Brace
Cc: Kashyap Desai
Cc: Mike Snitzer
Cc: Hannes Reinecke
Cc: Laurence Oberman
Cc: Bart Van AsscheSigned-off-by: Ming Lei
Reviewed-by: Bart Van Assche
Signed-off-by: Martin K. Petersen
10 Apr, 2018
1 commit
-
The first assignment to shost->use_blk_mq is redundant as it is
overwritten by the following statement. Remove this redundant code.Detected by CoverityScan, CID#1466993 ("Unused value")
Signed-off-by: Colin Ian King
Reviewed-by: Bart Van Assche
Signed-off-by: Martin K. Petersen
04 Apr, 2018
1 commit
-
Somewhat nasty merge due to conflicts between "33b28357dd00 scsi:
qla2xxx: Fix Async GPN_FT for FCP and FC-NVMe scan" and "2b5b96473efc
scsi: qla2xxx: Fix FC-NVMe LUN discovery"Merge is non-trivial and has been verified by Qlogic (Cavium)
Signed-off-by: James E.J. Bottomley
20 Mar, 2018
2 commits
-
After more than 15 years all users of this legacy interface are finally
gone. Rest in peace!Signed-off-by: Christoph Hellwig
Signed-off-by: Martin K. Petersen -
This function is only used inside the SCSI midlayer, so remove the
export for it.Signed-off-by: Christoph Hellwig
Reviewed-by: Johannes Thumshirn
Reviewed-by: Bart Van Assche
Signed-off-by: Martin K. Petersen
15 Mar, 2018
1 commit
-
This patch introduces 'force_blk_mq' to the scsi_host_template so that
drivers that have no desire to support the legacy I/O path can signal
blk-mq only support.[mkp: commit desc]
Cc: Omar Sandoval ,
Cc: "Martin K. Petersen" ,
Cc: James Bottomley ,
Cc: Christoph Hellwig ,
Cc: Don Brace
Cc: Kashyap Desai
Cc: Mike Snitzer
Cc: Laurence Oberman
Signed-off-by: Ming Lei
Reviewed-by: Hannes Reinecke
Reviewed-by: Christoph Hellwig
Signed-off-by: Martin K. Petersen
02 Mar, 2018
1 commit
-
Avoid that the recently introduced call_rcu() call in the SCSI core
triggers a double call_rcu() call.Reported-by: Natanael Copa
Reported-by: Damien Le Moal
References: https://bugzilla.kernel.org/show_bug.cgi?id=198861
Fixes: 3bd6f43f5cb3 ("scsi: core: Ensure that the SCSI error handler gets woken up")
Signed-off-by: Bart Van Assche
Reviewed-by: Damien Le Moal
Tested-by: Damien Le Moal
Cc: Natanael Copa
Cc: Damien Le Moal
Cc: Alexandre Oliva
Cc: Pavel Tikhomirov
Cc: Hannes Reinecke
Cc: Johannes Thumshirn
Cc:
Signed-off-by: Martin K. Petersen
14 Feb, 2018
1 commit
-
The eh_deadline definition occurs in the middle of the code for
releasing a host. Avoid splitting the host release code by moving the
definition of the eh_deadline parameter to the top of the hosts.c source
file.Signed-off-by: Bart Van Assche
Reviewed-by: Hannes Reinecke
Reviewed-by: Johannes Thumshirn
Cc: Christoph Hellwig
Cc: Hannes Reinecke
Cc: Johannes Thumshirn
Signed-off-by: Martin K. Petersen
08 Dec, 2017
1 commit
-
If scsi_eh_scmd_add() is called concurrently with
scsi_host_queue_ready() while shost->host_blocked > 0 then it can
happen that neither function wakes up the SCSI error handler. Fix
this by making every function that decreases the host_busy counter
wake up the error handler if necessary and by protecting the
host_failed checks with the SCSI host lock.Reported-by: Pavel Tikhomirov
References: https://marc.info/?l=linux-kernel&m=150461610630736
Fixes: commit 746650160866 ("scsi: convert host_busy to atomic_t")
Signed-off-by: Bart Van Assche
Reviewed-by: Pavel Tikhomirov
Tested-by: Stuart Hayes
Cc: Konstantin Khorenko
Cc: Stuart Hayes
Cc: Pavel Tikhomirov
Cc: Christoph Hellwig
Cc: Hannes Reinecke
Cc: Johannes Thumshirn
Cc:
Signed-off-by: Martin K. Petersen
05 Sep, 2017
1 commit
-
A patch I wrote myself several years ago removed SCSI target support
from the code under drivers/scsi. That patch removed the code that sets
uspace_req_q to a non-NULL value. Hence also remove the code that
depends on uspace_req_q != NULL.References: commit 066465251303 ("tgt: removal")
Signed-off-by: Bart Van Assche
Cc: Christoph Hellwig
Cc: Hannes Reinecke
Cc: Johannes Thumshirn
Reviewed-by: Johannes Thumshirn
Reviewed-by: Christoph Hellwig
Signed-off-by: Martin K. Petersen
28 Jan, 2017
2 commits
-
Rely on the new block layer functionality to allocate additional driver
specific data behind struct request instead of implementing it in SCSI
itѕelf.Signed-off-by: Christoph Hellwig
Acked-by: Martin K. Petersen
Reviewed-by: Hannes Reinecke
Signed-off-by: Jens Axboe -
Currently blk-mq always allocates the sense buffer using normal GFP_KERNEL
allocation. Refactor the cmd pool code to split the cmd and sense allocation
and share the code to allocate the sense buffers as well as the sense buffer
slab caches between the legacy and blk-mq path.Note that this switches to lazy allocation of the sense slab caches - the
slab caches (not the actual allocations) won't be destroy until the scsi
module is unloaded instead of keeping track of hosts using them.Signed-off-by: Christoph Hellwig
Reviewed-by: Hannes Reinecke
Acked-by: Martin K. Petersen
Signed-off-by: Jens Axboe
08 Oct, 2016
1 commit
-
Pull SCSI updates from James Bottomley:
"This update includes the usual round of major driver updates (hpsa,
be2iscsi, hisi_sas, zfcp, cxlflash). There's a new incarnation of hpsa
called smartpqi for which a driver is added, there's some cleanup work
of the ibm vscsi target and updates to libfc, plus a whole host of
minor fixes and updates and finally the removal of several ISA drivers
which seem not to have been used for years"* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (173 commits)
scsi: mvsas: Mark symbols static where possible
scsi: pm8001: Mark symbols static where possible
scsi: arcmsr: Simplify user_len checking
scsi: fcoe: fix off by one in eth2fc_speed()
scsi: dtc: remove from tree
scsi: t128: remove from tree
scsi: pas16: remove from tree
scsi: u14-34f: remove from tree
scsi: ultrastor: remove from tree
scsi: in2000: remove from tree
scsi: wd7000: remove from tree
scsi: scsi_dh_alua: Fix memory leak in alua_rtpg()
scsi: lpfc: Mark symbols static where possible
scsi: hpsa: correct call to hpsa_do_reset
scsi: ufs: Get a TM service response from the correct offset
scsi: ibmvfc: Fix I/O hang when port is not mapped
scsi: megaraid_sas: clean function declarations in megaraid_sas_base.c up
scsi: ipr: Remove redundant messages at adapter init time
scsi: ipr: Don't log unnecessary 9084 error details
scsi: smartpqi: raid bypass lba calculation fix
...
27 Sep, 2016
1 commit
-
This patch avoids that the following memory leak is triggered if
use_blk_mq is disabled after a SCSI host has been allocated by the
ib_srp driver and before the same SCSI host is freed:unreferenced object 0xffff8803a168c568 (size 256):
backtrace:
[] kmemleak_alloc+0x45/0xa0
[] __kmalloc_node+0x1e4/0x400
[] blk_mq_alloc_tag_set+0xb4/0x230
[] scsi_mq_setup_tags+0xc7/0xd0
[] scsi_add_host_with_dma+0x216/0x2d0
[] srp_create_target+0xe55/0x13d0 [ib_srp]
[] dev_attr_store+0x13/0x20
[] sysfs_kf_write+0x40/0x50
[] kernfs_fop_write+0x137/0x1c0
[] __vfs_write+0x23/0x140
[] vfs_write+0xb0/0x190
[] SyS_write+0x44/0xa0
[] entry_SYSCALL_64_fastpath+0x18/0xa8Fixes: 9aa9cc4221f5 ("scsi: remove the disable_blk_mq host flag")
Signed-off-by: Bart Van Assche
Cc: Christoph Hellwig
Cc: Martin K. Petersen
Cc:
Reviewed-by: Christoph Hellwig
Signed-off-by: Martin K. Petersen
26 Aug, 2016
1 commit
-
Runtime PM should be configured already once we call device_add. See
also the description in this mail thread
https://lists.linuxfoundation.org/pipermail/linux-pm/2009-November/023198.html
or the order of calls e.g. in usb_new_device.The changed order also helps to avoid scenarios where runtime pm for
&shost->shost_gendev is activated whilst the parent is suspended,
resulting in error message "runtime PM trying to activate child device
hostx but parent yyy is not active".In addition properly reverse the runtime pm calls in the error path.
Signed-off-by: Heiner Kallweit
Acked-by: Alan Stern
Signed-off-by: Martin K. Petersen
16 Jul, 2016
1 commit
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We've had scsi-mq for 2.5 years now, so we can remove the unused flag to
disable the code on a per-host basis that was put in for unexpected
emergencies during bringup.Signed-off-by: Christoph Hellwig
Reviewed-by: Bart Van Assche
Signed-off-by: Martin K. Petersen
19 Mar, 2016
1 commit
-
Pull libata updates from Tejun Heo:
- ahci grew runtime power management support so that the controller can
be turned off if no devices are attached.- sata_via isn't dead yet. It got hotplug support and more refined
workaround for certain WD drives.- Misc cleanups. There's a merge from for-4.5-fixes to avoid confusing
conflicts in ahci PCI ID table.* 'for-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
ata: ahci_xgene: dereferencing uninitialized pointer in probe
AHCI: Remove obsolete Intel Lewisburg SATA RAID device IDs
ata: sata_rcar: Use ARCH_RENESAS
sata_via: Implement hotplug for VT6421
sata_via: Apply WD workaround only when needed on VT6421
ahci: Add runtime PM support for the host controller
ahci: Add functions to manage runtime PM of AHCI ports
ahci: Convert driver to use modern PM hooks
ahci: Cache host controller version
scsi: Drop runtime PM usage count after host is added
scsi: Set request queue runtime PM status back to active on resume
block: Add blk_set_runtime_active()
ata: ahci_mvebu: add support for Armada 3700 variant
libata: fix unbalanced spin_lock_irqsave/spin_unlock_irq() in ata_scsi_park_show()
libata: support AHCI on OCTEON platform
24 Feb, 2016
1 commit
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Update the SCSI hosts module to use ida to manage its host_no index
instead of an atomic integer. This means that the SCSI host number will
now be reclaimable.Use the ida "simple" mechanism, since there should be no need for a
separate spin lock current usage. Ida was chosen over idr because the
hosts module already has its own instance and locking mechanisms that
aren't easily changed.Reviewed-by: Hannes Reinecke
Reviewed-by: Johannes Thumshirn
Signed-off-by: Lee Duncan
Signed-off-by: Martin K. Petersen
19 Feb, 2016
1 commit
-
Runtime PM of the SCSI host is already handled by calls to
scsi_autopm_get_host() and scsi_autopm_put_host() from appropriate places
whenever the host needs to be powered on. This works fine when there is
device connected to the host as once it runtime suspends the host will too.However, if there is no device connected the host is never runtime
suspended (the usage counter is always 0).Allow runtime suspend of host even if it has no devices connected by
calling scsi_autopm_put_host() at the end of scsi_add_host_with_dma(). We
temporarily increase runtime PM usage counter first so call to
scsi_autopm_put_host() will result idle request to be scheduled for the
device.Signed-off-by: Mika Westerberg
Signed-off-by: Tejun Heo
04 Dec, 2015
1 commit
01 Dec, 2015
1 commit
-
Avoid that kmemleak reports the following memory leak if a
SCSI LLD calls scsi_host_alloc() and scsi_host_put() but neither
scsi_host_add() nor scsi_host_remove(). The following shell
command triggers that scenario:for ((i=0; i/sys/class/infiniband_srp/srp-mlx4_0-1/add_target
done
doneunreferenced object 0xffff88021b24a220 (size 8):
comm "srp_daemon", pid 56421, jiffies 4295006762 (age 4240.750s)
hex dump (first 8 bytes):
68 6f 73 74 35 38 00 a5 host58..
backtrace:
[] kmemleak_alloc+0x7a/0xc0
[] __kmalloc_track_caller+0xfe/0x160
[] kvasprintf+0x5b/0x90
[] kvasprintf_const+0x8d/0xb0
[] kobject_set_name_vargs+0x3c/0xa0
[] dev_set_name+0x3c/0x40
[] scsi_host_alloc+0x327/0x4b0
[] srp_create_target+0x4e/0x8a0 [ib_srp]
[] dev_attr_store+0x1b/0x20
[] sysfs_kf_write+0x4a/0x60
[] kernfs_fop_write+0x14e/0x180
[] __vfs_write+0x2f/0xf0
[] vfs_write+0xa4/0x100
[] SyS_write+0x54/0xc0
[] entry_SYSCALL_64_fastpath+0x12/0x6fSigned-off-by: Bart Van Assche
Reviewed-by: Christoph Hellwig
Reviewed-by: Johannes Thumshirn
Reviewed-by: Sagi Grimberg
Reviewed-by: Lee Duncan
Cc: Christoph Hellwig
Cc: Hannes Reinecke
Cc: stable
Signed-off-by: Martin K. Petersen
10 Nov, 2015
1 commit
-
This patch changes the !blk-mq path to the same defaults as the blk-mq
I/O path by always enabling block tagging, and always using host wide
tags. We've had blk-mq available for a few releases so bugs with
this mode should have been ironed out, and this ensures we get better
coverage of over tagging setup over different configs.Signed-off-by: Christoph Hellwig
Acked-by: Jens Axboe
Reviewed-by: Hannes Reinecke
Signed-off-by: James Bottomley
12 Nov, 2014
2 commits
-
Signed-off-by: Christoph Hellwig
Reviewed-by: Bart Van Assche
Reviewed-by: Mike Christie
Reviewed-by: Martin K. Petersen
Reviewed-by: Hannes Reinecke -
Use the matching scope for logging messages to allow for
better command tracing.Signed-off-by: Hannes Reinecke
Suggested-by: Robert Elliott
Reviewed-by: Robert Elliott
Signed-off-by: Christoph Hellwig
26 Jul, 2014
1 commit
-
This patch adds support for an alternate I/O path in the scsi midlayer
which uses the blk-mq infrastructure instead of the legacy request code.Use of blk-mq is fully transparent to drivers, although for now a host
template field is provided to opt out of blk-mq usage in case any unforseen
incompatibilities arise.In general replacing the legacy request code with blk-mq is a simple and
mostly mechanical transformation. The biggest exception is the new code
that deals with the fact the I/O submissions in blk-mq must happen from
process context, which slightly complicates the I/O completion handler.
The second biggest differences is that blk-mq is build around the concept
of preallocated requests that also include driver specific data, which
in SCSI context means the scsi_cmnd structure. This completely avoids
dynamic memory allocations for the fast path through I/O submission.Due the preallocated requests the MQ code path exclusively uses the
host-wide shared tag allocator instead of a per-LUN one. This only
affects drivers actually using the block layer provided tag allocator
instead of their own. Unlike the old path blk-mq always provides a tag,
although drivers don't have to use it.For now the blk-mq path is disable by defauly and must be enabled using
the "use_blk_mq" module parameter. Once the remaining work in the block
layer to make blk-mq more suitable for slow devices is complete I hope
to make it the default and eventually even remove the old code path.Based on the earlier scsi-mq prototype by Nicholas Bellinger.
Thanks to Bart Van Assche and Robert Elliot for testing, benchmarking and
various sugestions and code contributions.Signed-off-by: Christoph Hellwig
Reviewed-by: Martin K. Petersen
Reviewed-by: Hannes Reinecke
Reviewed-by: Webb Scales
Acked-by: Jens Axboe
Tested-by: Bart Van Assche
Tested-by: Robert Elliott
18 Jul, 2014
1 commit
-
Using dev_printk variants prefixes the logging message with
the originating device, which makes debugging easier.Signed-off-by: Hannes Reinecke
Reviewed-by: Martin K. Petersen
Reviewed-by: Christoph Hellwig
Signed-off-by: Christoph Hellwig
16 Mar, 2014
1 commit
-
When the host template doesn't declare an eh_host_reset_handler
the eh_deadline mechanism is pointless and will set the
device to offline. So disable eh_deadline if no
eh_host_reset_handler is present.Signed-off-by: Hannes Reinecke
Signed-off-by: James Bottomley
19 Dec, 2013
2 commits
-
The former minimum valid value of 'eh_deadline' is 1s, which means
the earliest occasion to shorten EH is 1 second later since a
command is failed or timed out. But if we want to skip EH steps
ASAP, we have to wait until the first EH step is finished. If the
duration of the first EH step is long, this waiting time is
excruciating. So, it is necessary to accept 0 as the minimum valid
value for 'eh_deadline'.According to my test, with Hannes' patchset 'New EH command timeout
handler' as well, the minimum IO time is improved from 73s
(eh_deadline = 1) to 43s(eh_deadline = 0) when commands are timed
out by disabling RSCN and target port.Signed-off-by: Ren Mingxin
Signed-off-by: Hannes Reinecke
Signed-off-by: James Bottomley -
When a command runs into a timeout we need to send an 'ABORT TASK'
TMF. This is typically done by the 'eh_abort_handler' LLDD callback.Conceptually, however, this function is a normal SCSI command, so
there is no need to enter the error handler.This patch implements a new scsi_abort_command() function which
invokes an asynchronous function scsi_eh_abort_handler() to
abort the commands via the usual 'eh_abort_handler'.If abort succeeds the command is either retried or terminated,
depending on the number of allowed retries. However, 'eh_eflags'
records the abort, so if the retry would fail again the
command is pushed onto the error handler without trying to
abort it (again); it'll be cleared up from SCSI EH.[hare: smatch detected stray switch fixed]
Signed-off-by: Hannes Reinecke
Signed-off-by: James Bottomley
29 Nov, 2013
1 commit
-
Some host adapters do not pass commands through to the target disk
directly. Instead they provide an emulated target which may or may not
accurately report its capabilities. In some cases the physical device
characteristics are reported even when the host adapter is processing
commands on the device's behalf. This can lead to adapter firmware hangs
or excessive I/O errors.This patch disables WRITE SAME for devices connected to host adapters
that provide an emulated target. Driver writers can disable WRITE SAME
by setting the no_write_same flag in the host adapter template.[jejb: fix up rejections due to eh_deadline patch]
Signed-off-by: Martin K. Petersen
Cc: stable@kernel.org
Signed-off-by: James Bottomley
25 Oct, 2013
1 commit
-
This patchs adds an 'eh_deadline' sysfs attribute to the scsi
host which limits the overall runtime of the SCSI EH.
The 'eh_deadline' value is stored in the now obsolete field
'resetting'.
When a command is failed the start time of the EH is stored
in 'last_reset'. If the overall runtime of the SCSI EH is longer
than last_reset + eh_deadline, the EH is short-circuited and
falls through to issue a host reset only.[jejb: add comments in Scsi_Host about new fields]
Signed-off-by: Hannes Reinecke
Signed-off-by: James Bottomley
07 Feb, 2013
1 commit
-
All in-kernel users of class_find_device() don't really need mutable
data for match callback.In two places (kernel/power/suspend_test.c, drivers/scsi/osd/osd_uld.c)
this patch changes match callbacks to use const search data.The const is propagated to rtc_class_open() and power_supply_get_by_name()
parameters.Note that there's a dev reference leak in suspend_test.c that's not
touched in this patch.Signed-off-by: Michał Mirosław
Acked-by: Grant Likely
Signed-off-by: Greg Kroah-Hartman
20 Jul, 2012
2 commits
-
Use blk_queue_dead() to test whether the queue is dead instead
of !sdev. Since scsi_prep_fn() may be invoked concurrently with
__scsi_remove_device(), keep the queuedata (sdev) pointer in
__scsi_remove_device(). This patch fixes a kernel oops that
can be triggered by USB device removal. See also
http://www.spinics.net/lists/linux-scsi/msg56254.html.Other changes included in this patch:
- Swap the blk_cleanup_queue() and kfree() calls in
scsi_host_dev_release() to make that code easier to grasp.
- Remove the queue dead check from scsi_run_queue() since the
queue state can change anyway at any point in that function
where the queue lock is not held.
- Remove the queue dead check from the start of scsi_request_fn()
since it is redundant with the scsi_device_online() check.Reported-by: Jun'ichi Nomura
Signed-off-by: Bart Van Assche
Reviewed-by: Mike Christie
Reviewed-by: Tejun Heo
Cc:
Signed-off-by: James Bottomley -
Initialize atomic_t scsi_host_next_hn and ioerr_cntas per the guidelines
defined in Documentation/atomic_ops.txtSigned-off-by: Josh Hunt
Signed-off-by: James Bottomley
