--- zzzz-none-000/linux-4.9.279/drivers/net/ethernet/qlogic/netxen/netxen_nic_main.c	2021-08-08 06:38:54.000000000 +0000
+++ puma7-atom-6591-750/linux-4.9.279/drivers/net/ethernet/qlogic/netxen/netxen_nic_main.c	2023-02-08 11:43:42.000000000 +0000
@@ -1567,6 +1567,13 @@
 			adapter->physical_port = i;
 	}
 
+	/* MTU range: 0 - 8000 (P2) or 9600 (P3) */
+	netdev->min_mtu = 0;
+	if (NX_IS_REVISION_P3(adapter->ahw.revision_id))
+		netdev->max_mtu = P3_MAX_MTU;
+	else
+		netdev->max_mtu = P2_MAX_MTU;
+
 	netxen_nic_clear_stats(adapter);
 
 	err = netxen_setup_intr(adapter);