Re: [net-next PATCH 2/2] net: ravb: Fix R-Car RX frame size limit

[Andrew Lunn]

On Sat, Jun 15, 2024 at 11:30:38AM +0100, Paul Barker wrote:
> The RX frame size limit should not be based on the current MTU setting.
> Instead it should be based on the hardware capabilities.

This is a bit odd. MTU is Maximum Transmission Unit, so clearly is
about Tx. MRU does not really exist. Does TCP allow for asymmetric
MTU/MRU? Does MTU discovery work correctly for this?

In general, it seems like drivers implement min(MTU, MRU) and nothing
more. Do you have a real use case for this asymmetry?

      Andrew