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Commit f7d8ebf2 authored by Liang Chen's avatar Liang Chen Committed by Greg Kroah-Hartman
Browse files

bcache: cached_dev_free needs to put the sb page 



[ Upstream commit e8547d42095e58bee658f00fef8e33d2a185c927 ]

Same as cache device, the buffer page needs to be put while
freeing cached_dev.  Otherwise a page would be leaked every
time a cached_dev is stopped.

Signed-off-by: default avatarLiang Chen <liangchen.linux@gmail.com>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarColy Li <colyli@suse.de>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 714cd4a5

drivers/md/bcache/super.c

+3 −0
Original line number Diff line number Diff line
@@ -1274,6 +1274,9 @@ static void cached_dev_free(struct closure *cl) 


	mutex_unlock(&bch_register_lock);



	if (dc->sb_bio.bi_inline_vecs[0].bv_page)

		put_page(bio_first_page_all(&dc->sb_bio));



	if (!IS_ERR_OR_NULL(dc->bdev))

		blkdev_put(dc->bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);