Patch "blk-mq: actually hook up defer list when running requests" has been added to the 4.4-stable tree

This is a note to let you know that I've just added the patch titled

blk-mq: actually hook up defer list when running requests

to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
blk-mq-actually-hook-up-defer-list-when-running-requests.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Omar Sandoval <[email protected]>
Date: Wed, 8 Jun 2016 18:22:20 -0700
Subject: blk-mq: actually hook up defer list when running requests

From: Omar Sandoval <[email protected]>

commit 52b9c330c6a8a4b5a1819bdaddf4ec76ab571e81 upstream.

If ->queue_rq() returns BLK_MQ_RQ_QUEUE_OK, we use continue and skip over the rest of the loop body. However, dptr is assigned later in the loop body, and the BLK_MQ_RQ_QUEUE_OK case is exactly the case that we'd want it for.

NVMe isn't actually using BLK_MQ_F_DEFER_ISSUE yet, nor is any other in-tree driver, but if the code's going to be there, it might as well work.

---
 block/blk-mq.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -780,7 +780,7 @@ static void __blk_mq_run_hw_queue(struct
 		switch (ret) {
 		case BLK_MQ_RQ_QUEUE_OK:
 			queued++;
-			continue;
+			break;
 		case BLK_MQ_RQ_QUEUE_BUSY:
 			list_add(&rq->queuelist, &rq_list);
 			__blk_mq_requeue_request(rq);

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/blk-mq-actually-hook-up-defer-list-when-running-requests.patch