[1/7] bcache: cached_dev_free needs to put the sb page
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Message ID 20191209093829.19703-2-hch@lst.de
State New
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  • [1/7] bcache: cached_dev_free needs to put the sb page
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Commit Message

Christoph Hellwig Dec. 9, 2019, 9:38 a.m. UTC
From: Liang Chen <liangchen.linux@gmail.com>

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>
---
 drivers/md/bcache/super.c | 3 +++
 1 file changed, 3 insertions(+)

Patch
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diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index 77e9869345e7..a573ce1d85aa 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -1275,6 +1275,9 @@  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);