Re: [PATCH net] net/mlx4_en: Force CHECKSUM_NONE for short ethernet frames
From: Eric Dumazet <edumazet@google.com>
Date: 2019-01-31 19:42:18
On Thu, Jan 31, 2019 at 11:27 AM Saeed Mahameed [off-list ref] wrote:
Are you sure ? you are claiming that the hardware will skip csum complete i.e cqe->checksum will be 0xffff for padded short IP frames. i don't think this is the case, the whole bug is that the hw does provide a partial cqe->checksum (i.e doesn't included the padding bytes) even for short eth frames.
If the padding is not included, then cqe->checksum is 0xFFFF for correctly received frames. Otherwise, what would be cqe->checksum in this case ? A random value ?