netdev - Re: [PATCH net-next v2] docs: net: dsa: describe issues with checksum offload

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Date:   Wed, 13 Apr 2022 23:48:46 -0300
From:   Luiz Angelo Daros de Luca <luizluca@...il.com>
To:     Vladimir Oltean <vladimir.oltean@....com>
Cc:     Andrew Lunn <andrew@...n.ch>, Kurt Kanzenbach <kurt@...utronix.de>,
        George McCollister <george.mccollister@...il.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
        "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        "corbet@....net" <corbet@....net>,
        "pabeni@...hat.com" <pabeni@...hat.com>,
        "kuba@...nel.org" <kuba@...nel.org>,
        "davem@...emloft.net" <davem@...emloft.net>,
        Florian Fainelli <f.fainelli@...il.com>
Subject: Re: [PATCH net-next v2] docs: net: dsa: describe issues with checksum offload

> Ok, I'll go with "no checksum offload for its trailer tag, and bugs
> never fixed because no one uses it", in any case no Sasquatch. Thanks.

Vladimir, so the DSA switch will not copy the offload flags when a tag
requests tail room? At least it will work.

Now, if the offload HW does support that tag, what would be the
options? Set the slave port checksum flag from userland?
It would be nice to have some type of "magic trick" to have it enabled
by default. I'm already expecting a no, but wouldn't it be a nice case
for a DSA property in the device tree?

Regards,

Luiz