linux-kernel - Re: [PATCH net v3 1/4] net: ethernet: cortina: Fix MTU max setting

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Message-ID: <CACRpkdZ0zH6i8xuZGXq2VEd7brp-dmY89KXmKfxMTk=9eX1EQw@mail.gmail.com>
Date:   Wed, 8 Nov 2023 15:37:28 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Vladimir Oltean <olteanv@...il.com>
Cc:     Hans Ulli Kroll <ulli.kroll@...glemail.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Michał Mirosław <mirq-linux@...e.qmqm.pl>,
        Andrew Lunn <andrew@...n.ch>,
        linux-arm-kernel@...ts.infradead.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net v3 1/4] net: ethernet: cortina: Fix MTU max setting

On Wed, Nov 8, 2023 at 3:26 PM Vladimir Oltean <olteanv@...il.com> wrote:
> On Tue, Nov 07, 2023 at 10:54:26AM +0100, Linus Walleij wrote:

> > The RX max frame size is over 10000 for the Gemini ethernet,
> > but the TX max frame size is actually just 2047 (0x7ff after
> > checking the datasheet). Reflect this in what we offer to Linux,
> > cap the MTU at the TX max frame minus ethernet headers.
> >
> > Use the BIT() macro for related bit flags so these TX settings
> > are consistent.
>
> What does this second paragraph intend to say? The patch doesn't use the
> BIT() macro.

Ah it's a leftover from v1 where I did some unrelated cleanup using
BIT() but Andrew remarked on it so I dropped it.

Maybe this twoliner in the commit message can be deleted when
applying?

Yours,
Linus Walleij