[PATCH v3] net: ethernet: mtk_eth_soc: fix mtu warning

[Jakub Kicinski]

On Tue, 28 Jul 2020 14:27:43 +0200 Frank Wunderlich wrote:
> From: Landen Chao <landen.chao at mediatek.com>

Hi gents,

if the patch is from Landen we need his sign-off on it.

> 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: 7a4c53bee332 ("net: report invalid mtu value via netlink extack")
> Signed-off-by: René van Dorst <opensource at vdorst.com>
> Signed-off-by: Frank Wunderlich <frank-w at public-files.de>