linux-kernel - Re: [RFC PATCH v2 net-next 02/14] net: dsa: mt7530: fix phylink for port 5 and fix port 5 modes

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Message-ID: <20230411150056.2uhtoy6iqnt2qopr@skbuf>
Date:   Tue, 11 Apr 2023 18:00:56 +0300
From:   Vladimir Oltean <olteanv@...il.com>
To:     arinc9.unal@...il.com
Cc:     Sean Wang <sean.wang@...iatek.com>,
        Landen Chao <Landen.Chao@...iatek.com>,
        DENG Qingfang <dqfext@...il.com>,
        Daniel Golle <daniel@...rotopia.org>,
        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>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Russell King <linux@...linux.org.uk>,
        Arınç ÜNAL <arinc.unal@...nc9.com>,
        Richard van Schagen <richard@...terhints.com>,
        Richard van Schagen <vschagen@...com>,
        Frank Wunderlich <frank-w@...lic-files.de>,
        erkin.bozoglu@...ont.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: Re: [RFC PATCH v2 net-next 02/14] net: dsa: mt7530: fix phylink for
 port 5 and fix port 5 modes

On Fri, Apr 07, 2023 at 04:46:14PM +0300, arinc9.unal@...il.com wrote:
> From: Arınç ÜNAL <arinc.unal@...nc9.com>
> 
> There're two code paths for setting up port 5:
> 
> mt7530_setup()
> -> mt7530_setup_port5()
> 
> mt753x_phylink_mac_config()
> -> mt753x_mac_config()
>    -> mt7530_mac_config()
>       -> mt7530_setup_port5()
> 
> The first code path is supposed to run when PHY muxing is being used. In
> this case, port 5 is somewhat of a hidden port. It won't be defined on the
> devicetree so phylink can't be used to manage the port.
> 
> The second code path used to call mt7530_setup_port5() directly under case
> 5 on mt7530_phylink_mac_config() before it was moved to mt7530_mac_config()
> with 88bdef8be9f6 ("net: dsa: mt7530: Extend device data ready for adding a
> new hardware"). mt7530_setup_port5() will never run through this code path
> because the current code on mt7530_setup() bypasses phylink for all cases
> of port 5.
> 
> Fix this by leaving it to phylink if port 5 is used as a CPU, DSA, or user
> port. For the cases of PHY muxing or the port being disabled, call
> mt7530_setup_port5() directly from mt7530_setup() without involving
> phylink.
> 
> Move setting the interface and P5_DISABLED mode to a more specific
> location. They're supposed to be overwritten if PHY muxing is detected.
> 
> Add comments which explain the process.
> 
> Tested-by: Arınç ÜNAL <arinc.unal@...nc9.com>
> Signed-off-by: Arınç ÜNAL <arinc.unal@...nc9.com>
> ---

We have a natural language processing engine (AUTOSEL) which
automatically picks up as candidates for "stable" those patches which
weren't explicitly submitted through the proper process for that (and
they contain words like "fix", "bug", "crash", "leak" etc).

Your chosen wording, both in the commit title and message, would most
likely trigger that bot, and then you'd have to explain why you chose
this language and not something else more descriptive of your change.
It would be nice if you could rewrite the commit messages for your
entire series to be a bit more succint as to what is the purpose of the
change you are making, and don't use the word "fix" when there is no
problem to be observed.