diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c
index 459caaf6a..eea4d61a3 100755
--- a/drivers/net/dsa/b53/b53_common.c
+++ b/drivers/net/dsa/b53/b53_common.c
@@ -2182,7 +2182,7 @@ static int b53_change_mtu(struct dsa_switch *ds, int port, int mtu)
 	bool allow_10_100;
 
 	if (is5325(dev) || is5365(dev))
-		return 0;
+		return -EOPNOTSUPP;
 
 	if (!dsa_is_cpu_port(ds, port))
 		return 0;