[PATCH] dm bufio: fix missed destroy of mutex c->lock

[Xiongwei Song]

The mutex c->lock is initialized in dm_bufio_client_create, however,
it is not destroyed before free the structure of dm_bufio_client in
dm_bufio_client_destroy.

Signed-off-by: Xiongwei Song <sxwjean@xxxxxxxxx>
---
 drivers/md/dm-bufio.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/md/dm-bufio.c b/drivers/md/dm-bufio.c
index c546b567f3b5..53c0d5d2039a 100644
--- a/drivers/md/dm-bufio.c
+++ b/drivers/md/dm-bufio.c
@@ -1811,6 +1811,7 @@ void dm_bufio_client_destroy(struct dm_bufio_client *c)
 		BUG_ON(c->n_buffers[i]);
 
 	dm_io_client_destroy(c->dm_io);
+	mutex_destroy(&c->lock);
 	kfree(c);
 }
 EXPORT_SYMBOL_GPL(dm_bufio_client_destroy);
-- 
2.15.1