From: Christoph Hellwig <hch@lst.de>
Date: Thu, 22 Jul 2021 09:54:00 +0200
Subject: [PATCH] loop: don't grab a reference to the block device
Git-commit: 4b2731226d7de4302e4d8766c86e3a21c56dc3b1
Patch-mainline: v5.15-rc1
References: jsc#PED-1183

The whole device block device won't be removed while the disk is still
alive, so don't bother to grab a reference to it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: Ming Lei <ming.lei@rehat.com>
Reviewed-by: Chaitanya Kulkarni <ckulkarnilinux@gmail.com>
Link: https://lore.kernel.org/r/20210722075402.983367-8-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Acked-by: Hannes Reinecke <hare@suse.com>
---
 drivers/block/loop.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index f0cdff0c5fbf..a03ef5025f27 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -1304,10 +1304,6 @@ static int loop_configure(struct loop_device *lo, fmode_t mode,
 	if (partscan)
 		lo->lo_disk->flags &= ~GENHD_FL_NO_PART_SCAN;
 
-	/* Grab the block_device to prevent its destruction after we
-	 * put /dev/loopXX inode. Later in __loop_clr_fd() we bdput(bdev).
-	 */
-	bdgrab(bdev);
 	loop_global_unlock(lo, is_loop);
 	if (partscan)
 		loop_reread_partitions(lo);
@@ -1398,7 +1394,6 @@ static int __loop_clr_fd(struct loop_device *lo, bool release)
 	blk_queue_physical_block_size(lo->lo_queue, 512);
 	blk_queue_io_min(lo->lo_queue, 512);
 	if (bdev) {
-		bdput(bdev);
 		invalidate_bdev(bdev);
 		bdev->bd_inode->i_mapping->wb_err = 0;
 	}
-- 
2.35.3