From: Christoph Hellwig <hch@lst.de>
Date: Tue, 25 Jan 2022 08:02:09 +0000 (+0100)
Subject: loop: don't freeze the queue in lo_release
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=b2dae6e394d133385db288e3da137f9e84f96663;p=users%2Fhch%2Fblock.git

loop: don't freeze the queue in lo_release

By the time the final ->release is called there can't be outstanding I/O.
For non-final ->release there is no need for driver action at all.

Thus remove the useless queue freeze.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Tested-by: Darrick J. Wong <djwong@kernel.org>
---

diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index f349ddfc0e84..1ca70f735b5b 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -1766,13 +1766,6 @@ static void lo_release(struct gendisk *disk, fmode_t mode)
 		 */
 		loop_schedule_rundown(lo);
 		return;
-	} else if (lo->lo_state == Lo_bound) {
-		/*
-		 * Otherwise keep thread (if running) and config,
-		 * but flush possible ongoing bios in thread.
-		 */
-		blk_mq_freeze_queue(lo->lo_queue);
-		blk_mq_unfreeze_queue(lo->lo_queue);
 	}
 
 out_unlock: