--- zzzz-none-000/linux-4.9.279/drivers/net/ntb_netdev.c	2021-08-08 06:38:54.000000000 +0000
+++ puma7-atom-6591-750/linux-4.9.279/drivers/net/ntb_netdev.c	2023-02-08 11:43:42.000000000 +0000
@@ -433,6 +433,9 @@
 	ndev->netdev_ops = &ntb_netdev_ops;
 	ndev->ethtool_ops = &ntb_ethtool_ops;
 
+	ndev->min_mtu = 0;
+	ndev->max_mtu = ETH_MAX_MTU;
+
 	dev->qp = ntb_transport_create_queue(ndev, client_dev,
 					     &ntb_netdev_handlers);
 	if (!dev->qp) {