linux-kernel - Re: [PATCH net 3/7] net: dsa: mt7530: do not run mt7530_setup

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Date:   Tue, 28 Mar 2023 00:46:04 +0300
From:   Arınç ÜNAL <arinc.unal@...nc9.com>
To:     Vladimir Oltean <olteanv@...il.com>
Cc:     Sean Wang <sean.wang@...iatek.com>,
        Landen Chao <Landen.Chao@...iatek.com>,
        DENG Qingfang <dqfext@...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>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Russell King <linux@...linux.org.uk>,
        René van Dorst <opensource@...rst.com>,
        Russell King <rmk+kernel@...linux.org.uk>,
        Ilya Lipnitskiy <ilya.lipnitskiy@...il.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: [PATCH net 3/7] net: dsa: mt7530: do not run mt7530_setup_port5()
 if port 5 is disabled

On 27.03.2023 21:56, Vladimir Oltean wrote:
> On Sun, Mar 26, 2023 at 05:08:14PM +0300, arinc9.unal@...il.com wrote:
>> From: Arınç ÜNAL <arinc.unal@...nc9.com>
>>
>> There's no need to run all the code on mt7530_setup_port5() if port 5 is
>> disabled. Run mt7530_setup_port5() if priv->p5_intf_sel is not P5_DISABLED
>> and remove the P5_DISABLED case from mt7530_setup_port5().
>>
>> Stop initialising the interface variable as the remaining cases will always
>> call mt7530_setup_port5() with it initialised.
>>
>> Fixes: 38f790a80560 ("net: dsa: mt7530: Add support for port 5")
>> Tested-by: Arınç ÜNAL <arinc.unal@...nc9.com>
>> Signed-off-by: Arınç ÜNAL <arinc.unal@...nc9.com>
>> ---
> 
> Again, not sure what is the problem, and how this solution addresses
> that problem. I see Fixes tags for all patches, but I don't understand
> what they fix, what didn't work before that works now?

It really depends on what you call working. Does this patch fix any 
feature of the switch that didn't work before? No.

Does it fix a bad logic introduced with the said commit? Yes.

Arınç