On Thu, 2018-04-12 at 17:23 +0100, Alan Jenkins wrote:
> @@ -947,14 +946,12 @@ int blk_queue_enter(struct request_queue *q,
> blk_mq_req_flags_t flags)
>*/
> smp_rmb();
>
> - ret = wait_event_interruptible(q->mq_freeze_wq,
> +
When blk_queue_enter() waits for a queue to unfreeze, or unset the
PREEMPT_ONLY flag, do not allow it to be interrupted by a signal.
The PREEMPT_ONLY flag was introduced later in commit 3a0a529971ec
("block, scsi: Make SCSI quiesce and resume work reliably"). Note the SCSI
device is resumed
