[Devel] [PATCH rh7 v3 1/4] ploop: drop bdev refcounter on freeze_bdev() failure

[Andrey Ryabinin]

If freeze_bdev() called in find_and_freeze_bdev() fails we should
drop a reference counter grabbed by bdget_disk() call.

Signed-off-by: Andrey Ryabinin <aryabinin at virtuozzo.com>
Acked-by: Maxim Patlasov <mpatlasov at virtuozzo.com>
---
 drivers/block/ploop/dev.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/block/ploop/dev.c b/drivers/block/ploop/dev.c
index 83b0e32..453d36e 100644
--- a/drivers/block/ploop/dev.c
+++ b/drivers/block/ploop/dev.c
@@ -3339,7 +3339,10 @@ static struct super_block *find_and_freeze_bdev(struct gendisk *disk,
 		bdev = NULL;
 	}
 
-	*bdev_pp = bdev;
+	if (IS_ERR(sb))
+		bdput(bdev);
+	else
+		*bdev_pp = bdev;
 	return sb;
 }
 
-- 
2.7.3