Re: [PATCH v4 iwl-net] i40e: Prevent setting MTU if greater than MFS

[Erwan Velu]

Le 14/03/2024 à 18:55, Brett Creeley a écrit :
> [...]
> AFAIK there is no API for a user to change the max_mtu, so the only way
> the device's MFS would need to change is if it's done during
> initialization time, which should be done before netdev registration 
> anyway.

Sorry Brett, I was probably unclear and please note that I'm not a 
network developer, just a user that faced a bug.

My initial though was to check the mfs size in i40e_change_mtu() and if 
mfs is too small, then let's increase it.

Maybe just resetting it at init time to the largest value (which seems 
to be the default fw behavior) is a best approach.

I'd love to ear from Intel dev that knows this driver/cards/fw better on 
what's the best approach here.

Erwan,