linux-kernel - Re: [PATCH net v2] net: dsa: tag_rtl4

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Message-ID: <CACRpkdaoBo0S0RgLhacObd3pbjtWAfr6s3oizQAHqdB76gaG5A@mail.gmail.com>
Date:   Wed, 1 Nov 2023 21:26:50 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Luiz Angelo Daros de Luca <luizluca@...il.com>
Cc:     Vladimir Oltean <olteanv@...il.com>, Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net v2] net: dsa: tag_rtl4_a: Bump min packet size

On Wed, Nov 1, 2023 at 1:35 PM Luiz Angelo Daros de Luca
<luizluca@...il.com> wrote:

> Sorry but I noticed no issues:

Don't be sorry about that, it's good news because now I know
where to look, i.e. in the ethernet controller.

> My device is using
> https://github.com/luizluca/openwrt/tree/ath79_dsa_prep%2Bdevices . In
> summary, kernel 6.1 with openwrt generic patches and the
> reset-controller patch I sent net-next recently.

Looking good to me.

> [    3.888540] realtek-smi switch: found an RTL8366RB switch
> [    3.952366] realtek-smi switch: RTL5937 ver 3 chip found

Same version as mine too.

> [    3.967086] realtek-smi switch: set MAC: 42:E4:F5:XX:XX:XX

Unrelated: I have seen other DSA switches "inherit" the MAC of the
conduit interface (BRCM). I wonder if we could do that too instead
of this random MAC number. Usually the conduit interface has a
properly configured MAC.

> [    3.976779] realtek-smi switch: missing child interrupt-controller node
> [    3.983455] realtek-smi switch: no interrupt support
> [    4.158891] realtek-smi switch: no LED for port 5

Are the LEDs working? My device has no LEDs so I have never
tested it, despite I coded it. (Also these days we can actually
support each LED individually configured from device tree using
the LED API, but that would be quite a bit of code, so only some
fun for the aspiring developer...)

> Maybe the ag71xx driver is doing something differently.

I'll look at it!

Thanks a lot Luiz,
Linus Walleij