diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 41277b6c0268..48ac45f26fa3 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -1415,9 +1415,7 @@ static void tun_setup(struct net_device *dev)
  */
 static int tun_validate(struct nlattr *tb[], struct nlattr *data[])
 {
-	if (!data)
-		return 0;
-	return -EINVAL;
+	return -EOPNOTSUPP;
 }
 
 static struct rtnl_link_ops tun_link_ops __read_mostly = {