From: Mathias Kresin Date: Sun, 18 Feb 2018 21:48:44 +0000 (+0100) Subject: cns3xxx: fix mtu setting with kernel 4.14 X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=22ae14d0e7b882699f8512a75b4d06766aee4b78;p=openwrt%2Fstaging%2Flynxis.git cns3xxx: fix mtu setting with kernel 4.14 Since kernel 4.10 commit 61e84623ace3 ("net: centralize net_device min/max MTU checking"), the range of mtu is [min_mtu, max_mtu], which is [68, 1500] by default. It's necessary to set a max_mtu if a mtu > 1500 is supported. Tested-by: Koen Vandeputte Signed-off-by: Mathias Kresin --- diff --git a/target/linux/cns3xxx/files/drivers/net/ethernet/cavium/cns3xxx_eth.c b/target/linux/cns3xxx/files/drivers/net/ethernet/cavium/cns3xxx_eth.c index 77a7ab73d5..4556499429 100644 --- a/target/linux/cns3xxx/files/drivers/net/ethernet/cavium/cns3xxx_eth.c +++ b/target/linux/cns3xxx/files/drivers/net/ethernet/cavium/cns3xxx_eth.c @@ -1124,22 +1124,12 @@ static int eth_set_mac(struct net_device *netdev, void *p) return 0; } -static int cns3xxx_change_mtu(struct net_device *dev, int new_mtu) -{ - if (new_mtu > MAX_MTU) - return -EINVAL; - - dev->mtu = new_mtu; - return 0; -} - static const struct net_device_ops cns3xxx_netdev_ops = { .ndo_open = eth_open, .ndo_stop = eth_close, .ndo_start_xmit = eth_xmit, .ndo_set_rx_mode = eth_rx_mode, .ndo_do_ioctl = eth_ioctl, - .ndo_change_mtu = cns3xxx_change_mtu, .ndo_set_mac_address = eth_set_mac, .ndo_validate_addr = eth_validate_addr, }; @@ -1236,6 +1226,7 @@ static int eth_init_one(struct platform_device *pdev) dev->netdev_ops = &cns3xxx_netdev_ops; dev->ethtool_ops = &cns3xxx_ethtool_ops; dev->tx_queue_len = 1000; + dev->max_mtu = MAX_MTU; dev->features = NETIF_F_IP_CSUM | NETIF_F_SG | NETIF_F_FRAGLIST; switch_port_tab[port->id] = port;