net: ethernet: mtk_eth_soc: fix MTU warnings

[ Upstream commit 555a893 ] 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: bfcb813 ("net: dsa: configure the MTU for switch ports") Fixes: 72579e1 ("net: dsa: don't fail to probe if we couldn't set the MTU") Fixes: 7a4c53b ("net: report invalid mtu value via netlink extack") Signed-off-by: Landen Chao <[email protected]> Signed-off-by: Frank Wunderlich <[email protected]> Reviewed-by: Andrew Lunn <[email protected]> Signed-off-by: David S. Miller <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
boundarydevices · Aug 25, 2020 · aa925c9 · aa925c9
1 parent 7ff26c9
commit aa925c9
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -2452,6 +2452,8 @@ 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: