On Sat, Jun 30, 2018 at 06:18:06PM +0200, Linus Walleij wrote: > The hardware supposedly handles frames up to 10236 bytes and > implements .ndo_change_mtu() so accept 10236 minus the ethernet > header for a VLAN tagged frame on the netdevices. > > Signed-off-by: Linus Walleij <linus.wall...@linaro.org> > --- > drivers/net/ethernet/cortina/gemini.c | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/drivers/net/ethernet/cortina/gemini.c > b/drivers/net/ethernet/cortina/gemini.c > index 79324bbfd768..ae475393e4ac 100644 > --- a/drivers/net/ethernet/cortina/gemini.c > +++ b/drivers/net/ethernet/cortina/gemini.c > @@ -2473,6 +2473,11 @@ static int gemini_ethernet_port_probe(struct > platform_device *pdev) > > netdev->hw_features = GMAC_OFFLOAD_FEATURES; > netdev->features |= GMAC_OFFLOAD_FEATURES | NETIF_F_GRO; > + /* We can handle jumbo frames up to 10236 bytes so, let's accept > + * payloads of 10236 bytes minus VLAN and ethernet header > + */ > + netdev->min_mtu = 256; > + netdev->max_mtu = 10236 - VLAN_ETH_HLEN;
Hi Linus The commit message does not mention the min mtu you set here. Where does 256 come from? Thanks Andrew