Btrfs: mnt_drop_write in ioctl_trans_end

Add missing mnt_drop_write to match the mnt_want_write in
btrfs_ioctl_trans_start.

Signed-off-by: Sage Weil <sage@newdream.net>

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 6228b69..69c4a07 100644 (file)
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -1059,6 +1059,8 @@ long btrfs_ioctl_trans_end(struct file *file)
        root->fs_info->open_ioctl_trans--;
        mutex_unlock(&root->fs_info->trans_mutex);
 
+       mnt_drop_write(file->f_path.mnt);
+
 out:
        return ret;
 }