From: Miao Xie <miaox@cn.fujitsu.com>
Date: Fri, 21 Dec 2012 10:38:50 +0000 (+0000)
Subject: Btrfs: fix missing write access release in btrfs_ioctl_resize()
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=97547676570b3bd908560741315bf4b7d635bcf5;p=deliverable%2Flinux.git

Btrfs: fix missing write access release in btrfs_ioctl_resize()

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>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
---

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 0de21213d05d..982c0b9ceea5 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -1339,6 +1339,7 @@ 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");
+		mnt_drop_write_file(file);
 		return -EINPROGRESS;
 	}