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loop: don't grab a reference to the block device 

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>
This commit is contained in:
Christoph Hellwig 2021-07-22 09:54:00 +02:00 committed by Jens Axboe
parent 9d3b881389
commit 4b2731226d
1 changed files with 0 additions and 5 deletions
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5
drivers/block/loop.c
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@ -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;
}