Btrfs: fix unlock order in btrfs_ioctl_rm_dev

Fix unlock order in btrfs_ioctl_rm_dev().

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index fcf1b1b400823de809da09827ddc4c42a645b5eb..f5c1c150d9f3be7bcf2feb2edc0601dabc5ad3c3 100644 (file)
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -2319,8 +2319,8 @@ static long btrfs_ioctl_rm_dev(struct file *file, void __user *arg)
        kfree(vol_args);
 out:
        mutex_unlock(&root->fs_info->volume_mutex);
-       mnt_drop_write_file(file);
        atomic_set(&root->fs_info->mutually_exclusive_operation_running, 0);
+       mnt_drop_write_file(file);
        return ret;
 }