| From 2a352451d38a6846f14109097b86077d44062943 Mon Sep 17 00:00:00 2001 |
| From: Sasha Levin <sashal@kernel.org> |
| Date: Fri, 24 Jan 2020 01:01:26 +0800 |
| Subject: bcache: cached_dev_free needs to put the sb page |
| |
| From: Liang Chen <liangchen.linux@gmail.com> |
| |
| [ 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: Liang Chen <liangchen.linux@gmail.com> |
| Signed-off-by: Christoph Hellwig <hch@lst.de> |
| Signed-off-by: Coly Li <colyli@suse.de> |
| Signed-off-by: Jens Axboe <axboe@kernel.dk> |
| Signed-off-by: Sasha Levin <sashal@kernel.org> |
| --- |
| drivers/md/bcache/super.c | 3 +++ |
| 1 file changed, 3 insertions(+) |
| |
| diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c |
| index 64999c7a8033f..b86cf72033401 100644 |
| --- a/drivers/md/bcache/super.c |
| +++ b/drivers/md/bcache/super.c |
| @@ -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); |
| |
| -- |
| 2.20.1 |
| |
