Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

[linux.git] / drivers / scsi / scsi_lib.c

diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index c7fccbb8f5545e463537389bc34b607de3dc9cb3..fa6e0c3b3aa678cd1e62f91021dc89036211aa8a 100644 (file)
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -697,6 +697,12 @@ static bool scsi_end_request(struct request *req, blk_status_t error,
                 */
                scsi_mq_uninit_cmd(cmd);
 
+               /*
+                * queue is still alive, so grab the ref for preventing it
+                * from being cleaned up during running queue.
+                */
+               percpu_ref_get(&q->q_usage_counter);
+
                __blk_mq_end_request(req, error);
 
                if (scsi_target(sdev)->single_lun ||
@@ -704,6 +710,8 @@ static bool scsi_end_request(struct request *req, blk_status_t error,
                        kblockd_schedule_work(&sdev->requeue_work);
                else
                        blk_mq_run_hw_queues(q, true);
+
+               percpu_ref_put(&q->q_usage_counter);
        } else {
                unsigned long flags;