Commit 6f935470 authored Jul 29, 2020 by Landen Chao Committed by Greg Kroah-Hartman Aug 11, 2020

net: ethernet: mtk_eth_soc: fix MTU warnings



[ Upstream commit 555a893303872e044fb86f0a5834ce78d41ad2e2 ]

in recent kernel versions there are warnings about incorrect MTU size
like these:

eth0: mtu greater than device maximum
mtk_soc_eth 1b100000.ethernet eth0: error -22 setting MTU to include DSA overhead

Fixes: bfcb813203e6 ("net: dsa: configure the MTU for switch ports")
Fixes: 72579e14a1d3 ("net: dsa: don't fail to probe if we couldn't set the MTU")
Fixes: 7a4c53be ("net: report invalid mtu value via netlink extack")
Signed-off-by: Landen Chao <landen.chao@mediatek.com>
Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent bd68177f

drivers/net/ethernet/mediatek/mtk_eth_soc.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -2878,6 +2878,8 @@ static int mtk_add_mac(struct mtk_eth eth, struct device_node np)
		eth->netdev[id]->irq = eth->irq[0];
		eth->netdev[id]->dev.of_node = np;

		eth->netdev[id]->max_mtu = MTK_MAX_RX_LENGTH - MTK_RX_ETH_HLEN;

		return 0;

		free_netdev: