linux-stable.git/drivers/scsi, branch v2.6.38

block: add @force_kblockd to __blk_run_queue()

2011-03-02T13:48:05+00:00

__blk_run_queue() automatically either calls q->request_fn() directly
or schedules kblockd depending on whether the function is recursed.
blk-flush implementation needs to be able to explicitly choose
kblockd.  Add @force_kblockd.

All the current users are converted to specify %false for the
parameter and this patch doesn't introduce any behavior change.

stable: This is prerequisite for fixing ide oops caused by the new
        blk-flush implementation.

Signed-off-by: Tejun Heo 
Cc: Jan Beulich 
Cc: James Bottomley 
Cc: stable@kernel.org
Signed-off-by: Jens Axboe

[SCSI] qla2xxx: Return DID_NO_CONNECT when FC device is lost.

2011-02-15T17:12:17+00:00

If the target device gets lost, this fix is needed, as it causes
negative unintended responses on basic I/O tests. If the target device
gets lost, the upstream qla2xxx driver returns
SCSI_MLQUEUE_TARGET_BUSY which causes an immediate retry without drop
in the number of allowed retries. This semantic change, as a result of
removing FC_DEVICE_LOST check is reasonable, as it only extends a
short transitional period, until the transport is called to notify
that the rport as lost (fc_remote_port_delete()). Once transport
notification is done, fc_remote_port_chkready() check will take over.

Signed-off-by: Andrew Vasquez 
Signed-off-by: Madhuranath Iyengar 
Signed-off-by: James Bottomley

[SCSI] scsi_debug: Fix 32-bit overflow in do_device_access causing memory corruption

2011-02-12T17:21:56+00:00

If I create a scsi_debug device that is larger than 4GB, the multiplication of
(block * scsi_debug_sector_size) can produce a 64-bit value.  Unfortunately,
the compiler sees two 32-bit quantities and performs a 32-bit multiplication,
thus truncating the bits above 2^32.  This causes the wrong memory location to
be read or written.  Change block and rest to be unsigned long long.

Signed-off-by: Darrick J. Wong 
Acked-by: Douglas Gilbert 
Signed-off-by: James Bottomley

[SCSI] qla2xxx: Change from irq to irqsave with host_lock

2011-02-12T16:52:40+00:00

Make the driver safer by using irqsave/irqrestore with host_lock.

Signed-off-by: Madhuranath Iyengar 
Signed-off-by: James Bottomley

[SCSI] qla2xxx: Fix race that could hang kthread_stop()

2011-02-12T16:17:13+00:00

There is a small race window in qla2x00_do_dpc() between
checking for kthread_should_stop() and going to sleep after
setting TASK_INTERRUPTIBLE. If qla2x00_free_device() is called
in this window, kthread_stop will wait forever because there
will be no one to wake up the process.

Fix by making sure we only set TASK_INTERRUPTIBLE before checking
kthread_stop().

Reported-by: Bandan Das 
Acked-by: Madhuranath Iyengar 
Signed-off-by: James Bottomley

[SCSI] libsas: fix runaway error handler problem

2011-01-24T17:52:33+00:00

libsas makes use of scsi_schedule_eh() but forgets to clear the
host_eh_scheduled flag in its error handling routine.  Because of this,
the error handler thread never gets to sleep; it's constantly awake and
trying to run the error routine leading to console spew and inability to
run anything else (at least on a UP system).  The fix is to clear the
flag as we splice the work queue.

Cc: stable@kernel.org
Signed-off-by: James Bottomley

[SCSI] arcmsr: Fix the issue of system hangup after commands timeout on ARC-1200

2011-01-24T17:19:59+00:00

[jejb: fix up patch problems and checkpatch.pl issues]
Signed-off-by: Nick Cheng 
Signed-off-by: James Bottomley

[SCSI] mpt2sas: fix Integrated Raid unsynced on shutdown problem

2011-01-24T15:30:29+00:00

Issue:
IR shutdown(sending) and IR shutdown(complete) messages not
listed in /var/log/messages when driver is removed.

The driver needs to issue a MPI2_RAID_ACTION_SYSTEM_SHUTDOWN_INITIATED
request when the driver is unloaded so the IR metadata journal is updated.
If this request is not sent, then the volume would need a "check
consistency" issued on the next bootup if the volume was roamed from one
initiator to another. The current driver supports this feature only when the
system is rebooted, however this also need to be supported if the driver is
unloaded

Fix:
To fix this issue, the driver is going
to need to call the _scsih_ir_shutdown prior to reporting
the volumes missing from the OS, hence the device handles
are still present.

Signed-off-by: Kashyap Desai 
Cc: stable@kernel.org
Signed-off-by: James Bottomley

[SCSI] mpt2sas: Kernel Panic during Large Topology discovery

2011-01-24T15:28:00+00:00

There was a configuration page timing out during the initial port
enable at driver load time. The port enable would fail, and this would
result in the driver unloading itself, meanwhile the driver was accessing
freed memory in another context resulting in the panic.  The fix is to
prevent access to freed memory once the driver had issued the diag reset
which woke up the sleeping port enable process.  The routine
_base_reset_handler was reorganized so the last sleeping process woken up was
the port_enable.

Signed-off-by: Kashyap Desai 
Cc: stable@kernel.org
Signed-off-by: James Bottomley

[SCSI] mpt2sas: Fix the race between broadcast asyn event and scsi command completion

2011-01-24T15:24:28+00:00

False timeout after hard resets, there were two issues which leads
to timeout.
(1) Panic because of invalid memory access in the broadcast asyn
event processing routine due to a race between accessing the scsi command
pointer from broadcast asyn event processing thread and completing
the same scsi command from the interrupt context.
(2)  Broadcast asyn event notifcations are not handled due to events
ignored while the broadcast asyn event is activity being processed
from the event process kernel thread.

In addition, changed the ABRT_TASK_SET to ABORT_TASK in the
broadcast async event processing routine.   This is less disruptive to other
request that generate Broadcast Asyn Primitives besides target
reset. e.g clear reservations, microcode download,and mode select.

Signed-off-by: Kashyap Desai 
Cc: stable@kernel.org
Signed-off-by: James Bottomley