linux-kernel - Re: [PATCH 1/2] net: ethernet: davinci_emac: Use MAC Address from Device Tree

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Message-ID: <CAHCN7xJ_2HjQ8iCYimPG+CiMQuDy7YpG2sf6Vq30VsddaSs8CQ@mail.gmail.com>
Date:   Wed, 11 Oct 2023 07:53:55 -0500
From:   Adam Ford <aford173@...il.com>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     linux-omap@...r.kernel.org, aford@...conembedded.com,
        Benoît Cousson <bcousson@...libre.com>,
        Tony Lindgren <tony@...mide.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Grygorii Strashko <grygorii.strashko@...com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH 1/2] net: ethernet: davinci_emac: Use MAC Address from
 Device Tree

On Wed, Sep 6, 2023 at 7:39 AM Andrew Lunn <andrew@...n.ch> wrote:
>
> On Wed, Sep 06, 2023 at 04:51:42AM -0500, Adam Ford wrote:
> > Currently there is a device tree entry called "local-mac-address"
> > which can be filled by the bootloader or manually set.This is
> > useful when the user does not want to use the MAC address
> > programmed into the SoC.
> >
> > Currently, the davinci_emac reads the MAC from the DT, copies
> > it from pdata->mac_addr to priv->mac_addr, then blindly overwrites
> > it by reading from registers in the SoC, and falls back to a
> > random MAC if it's still not valid.  This completely ignores any
> > MAC address in the device tree.
> >
> > In order to use the local-mac-address, check to see if the contents
> > of priv->mac_addr are valid before falling back to reading from the
> > SoC when the MAC address is not valid.
> >
> > Signed-off-by: Adam Ford <aford173@...il.com>
>
> There is the potential for regressions here, since behaviour is being
> changed. But i do think what you are doing make sense.
>
> Reviewed-by: Andrew Lunn <andrew@...n.ch>

I don't know who the right person is to ask, but is there any chance
this can be accepted?

adam
>
>     Andrew