Reported-by: Mike Christie <michaelc@xxxxxxxxxxx>
Signed-off-by: Bart Van Assche <bvanassche@xxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Cc: James Bottomley <JBottomley@xxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxx>
---
drivers/scsi/scsi_lib.c | 9 +++++++++
1 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 7ebe167..af6357a 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -479,15 +479,24 @@ void scsi_requeue_run_queue(struct work_struct *work)
*/
static void scsi_requeue_command(struct request_queue *q, struct scsi_cmnd *cmd)
{
+ struct scsi_device *sdev = cmd->device;
struct request *req = cmd->request;
unsigned long flags;
+ /*
+ * We need to hold a reference on the device to avoid that the queue
+ * gets killed after the unlock and before scsi_run_queue is invoked.
+ */
+ get_device(&sdev->sdev_gendev);
+
spin_lock_irqsave(q->queue_lock, flags);
scsi_unprep_request(req);
blk_requeue_request(q, req);
spin_unlock_irqrestore(q->queue_lock, flags);
scsi_run_queue(q);
+
+ put_device(&sdev->sdev_gendev);
}
void scsi_next_command(struct scsi_cmnd *cmd)
--
1.7.7
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