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| author | Tejun Heo <tj@kernel.org> | 2010-04-15 08:57:37 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-05-12 15:02:31 -0700 |
| commit | e878132440a48fdd8340018f88f71ce520ab0ff9 (patch) | |
| tree | f455827c96f6f6dfb21c7bc60d32830bfd05d608 /drivers/ata | |
| parent | 99cc64ae9449e60795f1844c8b312b29a363e1da (diff) | |
| download | kernel-common-e878132440a48fdd8340018f88f71ce520ab0ff9.tar.gz kernel-common-e878132440a48fdd8340018f88f71ce520ab0ff9.tar.bz2 kernel-common-e878132440a48fdd8340018f88f71ce520ab0ff9.zip | |
libata: fix locking around blk_abort_request()
commit fa41efdae7de61191a7bda3a00e88ef69afb5bb9 upstream.
blk_abort_request() expectes queue lock to be held by the caller.
Grab it before calling the function.
Lack of this synchronization led to infinite loop on corrupt
q->timeout_list.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/ata')
| -rw-r--r-- | drivers/ata/libata-eh.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index 9f6cfac0f2cc..9e18cc9be0d3 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -879,6 +879,8 @@ static void ata_eh_set_pending(struct ata_port *ap, int fastdrain) void ata_qc_schedule_eh(struct ata_queued_cmd *qc) { struct ata_port *ap = qc->ap; + struct request_queue *q = qc->scsicmd->device->request_queue; + unsigned long flags; WARN_ON(!ap->ops->error_handler); @@ -890,7 +892,9 @@ void ata_qc_schedule_eh(struct ata_queued_cmd *qc) * Note that ATA_QCFLAG_FAILED is unconditionally set after * this function completes. */ + spin_lock_irqsave(q->queue_lock, flags); blk_abort_request(qc->scsicmd->request); + spin_unlock_irqrestore(q->queue_lock, flags); } /** |