linux-kernel - Re: [PATCH 3/3] net: xilinx: axienet: Relax partial rx checksum checks

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Message-ID: <CANn89iKJiU0DirRbpnMTPe0w_PZn9rf1_5=mAxhi3zbcoJR49A@mail.gmail.com>
Date: Wed, 4 Sep 2024 18:30:52 +0200
From: Eric Dumazet <edumazet@...gle.com>
To: Sean Anderson <sean.anderson@...ux.dev>
Cc: Radhey Shyam Pandey <radhey.shyam.pandey@....com>, "David S . Miller" <davem@...emloft.net>, 
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org, 
	Michal Simek <michal.simek@....com>, linux-arm-kernel@...ts.infradead.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] net: xilinx: axienet: Relax partial rx checksum checks

On Tue, Sep 3, 2024 at 8:43 PM Sean Anderson <sean.anderson@...ux.dev> wrote:
>
> The partial rx checksum feature computes a checksum over the entire
> packet, regardless of the L3 protocol. Remove the check for IPv4.
> Additionally, packets under 64 bytes should have been dropped by the
> MAC, so we can remove the length check as well.

Some packets have a smaller len (than 64).

For instance, TCP pure ACK and no options over IPv4 would be 54 bytes long.

Presumably they are not dropped by the MAC ?