[PATCH net v4 3/3] net: ethernet: cortina: Fix MTU max setting

[Vladimir Oltean]

On Thu, Nov 09, 2023 at 10:03:14AM +0100, Linus Walleij wrote:
> The RX max frame size is over 10000 for the Gemini ethernet,
> but the TX max frame size is actually just 2047 (0x7ff after
> checking the datasheet). Reflect this in what we offer to Linux,
> cap the MTU at the TX max frame minus ethernet headers.
> 
> We delete the code disabling the hardware checksum for large
> MTUs as netdev->mtu can no longer be larger than
> netdev->max_mtu meaning the if()-clause in gmac_fix_features()
> is never true.
> 
> Fixes: 4d5ae32f5e1e ("net: ethernet: Add a driver for Gemini gigabit ethernet")
> Reviewed-by: Andrew Lunn <andrew at lunn.ch>
> Signed-off-by: Linus Walleij <linus.walleij at linaro.org>
> ---

Reviewed-by: Vladimir Oltean <olteanv at gmail.com>