[PATCH 1/3] Btrfs: fix missing write access release in btrfs_ioctl_resize()

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

We forget to give up the write access after we find some device operation
is going on. Fix it.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
---
 fs/btrfs/ioctl.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 7624212..679b82c 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -1338,7 +1338,9 @@ static noinline int btrfs_ioctl_resize(struct file *file,
 
 	if (atomic_xchg(&root->fs_info->mutually_exclusive_operation_running,
 			1)) {
-		pr_info("btrfs: dev add/delete/balance/replace/resize operation in progress\n");
+		pr_info("btrfs: dev add/delete/balance/replace/resize operation"
+			" in progress\n");
+		mnt_drop_write_file(file);
 		return -EINPROGRESS;
 	}
 
-- 
1.7.11.7