--- zzzz-none-000/linux-4.9.279/drivers/net/ethernet/marvell/mv643xx_eth.c	2021-08-08 06:38:54.000000000 +0000
+++ puma7-atom-6591-750/linux-4.9.279/drivers/net/ethernet/marvell/mv643xx_eth.c	2023-02-08 11:43:42.000000000 +0000
@@ -2571,9 +2571,6 @@
 {
 	struct mv643xx_eth_private *mp = netdev_priv(dev);
 
-	if (new_mtu < 64 || new_mtu > 9500)
-		return -EINVAL;
-
 	dev->mtu = new_mtu;
 	mv643xx_eth_recalc_skb_size(mp);
 	tx_set_rate(mp, 1000000000, 16777216);
@@ -3113,6 +3110,10 @@
 	if (!dev)
 		return -ENOMEM;
 
+	/* MTU range: 64 - 9500 */
+	dev->min_mtu = 64;
+	dev->max_mtu = 9500;
+
 	SET_NETDEV_DEV(dev, &pdev->dev);
 	mp = netdev_priv(dev);
 	platform_set_drvdata(pdev, mp);