[PATCH 5/5] Btrfs: fix memory leak in btrfs_pause_balance()

[Miao Xie <miaox@cn.fujitsu.com>]

We forget to free fs_info->balance_ctl in the btrfs_pause_balance()
when umounting the fs.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
---
 fs/btrfs/volumes.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index c536d52..fd7fe80 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -2937,6 +2937,9 @@ int btrfs_pause_balance(struct btrfs_fs_info *fs_info)
 		ret = -ENOTCONN;
 	}
 
+	if (btrfs_fs_closing(fs_info) && fs_info->balance_ctl)
+		unset_balance_control(fs_info);
+
 	mutex_unlock(&fs_info->balance_mutex);
 	return ret;
 }
-- 
1.7.6.5