Re: [PATCH v2] net: dsa: tag_mtk: add padding for tx packets

[Felix Fietkau]

On 10.05.22 14:37, Vladimir Oltean wrote:
> On Tue, May 10, 2022 at 11:40:13AM +0200, Felix Fietkau wrote:
> > Padding for transmitted packets needs to account for the special tag.
> > With not enough padding, garbage bytes are inserted by the switch at the
> > end of small packets.
>
> I don't think padding bytes are guaranteed to be zeroes. Aren't they
> discarded? What is the issue?
With the broken padding, ARP requests are silently discarded on the 
receiver side in my test. Adding the padding explicitly fixes the issue.

- Felix