From 1b4d0d8ea7b3cbd107f345ab766416f9b38ce66a Mon Sep 17 00:00:00 2001 From: James Bottomley Date: Thu, 13 May 2010 09:31:54 -0500 Subject: [SCSI] libsas: fix deref before check in commit 70b25f890ce commit 70b25f890ce9f0520c64075ce9225a5b020a513e Author: Tejun Heo Date: Thu Apr 15 09:00:08 2010 +0900 [SCSI] fix locking around blk_abort_request() Introduced a reference before check problem, fix this by moving the lock shorthand code to be right at the point of actual use. Reported-by: Dan Carpenter Acked-by: Tejun Heo Cc: Stable Tree Signed-off-by: James Bottomley --- drivers/scsi/libsas/sas_ata.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'drivers/scsi/libsas/sas_ata.c') diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c index 88f744672576..8c496b56556c 100644 --- a/drivers/scsi/libsas/sas_ata.c +++ b/drivers/scsi/libsas/sas_ata.c @@ -395,12 +395,13 @@ int sas_ata_init_host_and_port(struct domain_device *found_dev, void sas_ata_task_abort(struct sas_task *task) { struct ata_queued_cmd *qc = task->uldd_task; - struct request_queue *q = qc->scsicmd->device->request_queue; struct completion *waiting; - unsigned long flags; /* Bounce SCSI-initiated commands to the SCSI EH */ if (qc->scsicmd) { + struct request_queue *q = qc->scsicmd->device->request_queue; + unsigned long flags; + spin_lock_irqsave(q->queue_lock, flags); blk_abort_request(qc->scsicmd->request); spin_unlock_irqrestore(q->queue_lock, flags); -- cgit v1.2.3-59-g8ed1b