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