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>
Link: https://lore.kernel.org/r/20220330052917.2566582-10-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 610942e..d6315b0 100644 (file)
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -1749,13 +1749,6 @@ static void lo_release(struct gendisk *disk, fmode_t mode)
                 */
                __loop_clr_fd(lo, true);
                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: