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Date:   Sun, 11 Jun 2023 10:23:55 +0300
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Subject: Re: [PATCH net-next 08/30] net: dsa: mt7530: change p{5,6}_interface
 to p{5,6}_configured
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To:     Vladimir Oltean <olteanv@gmail.com>
Cc:     "Russell King (Oracle)" <linux@armlinux.org.uk>,
        Sean Wang <sean.wang@mediatek.com>,
        Landen Chao <Landen.Chao@mediatek.com>,
        DENG Qingfang <dqfext@gmail.com>,
        Daniel Golle <daniel@makrotopia.org>,
        Andrew Lunn <andrew@lunn.ch>,
        Florian Fainelli <f.fainelli@gmail.com>,
        "David S. Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@collabora.com>,
        Richard van Schagen <richard@routerhints.com>,
        Richard van Schagen <vschagen@cs.com>,
        Frank Wunderlich <frank-w@public-files.de>,
        Bartel Eerdekens <bartel.eerdekens@constell8.be>,
        erkin.bozoglu@xeront.com, mithat.guner@xeront.com,
        netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org,
        linux-mediatek@lists.infradead.org
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From:   =?UTF-8?B?QXLEsW7DpyDDnE5BTA==?= <arinc.unal@arinc9.com>
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On 10.06.2023 20:55, Vladimir Oltean wrote:
> On Sat, Jun 10, 2023 at 01:57:27PM +0300, Arınç ÜNAL wrote:
>> I was able to confirm all user ports of the MT7531BE switch transmit/receive
>> traffic to/from the SGMII CPU port and computer fine after getting rid of
>> priv->info->cpu_port_config().
>>
>> Tried all user ports being affine to the RGMII CPU port, that works too.
>>
>> https://github.com/arinc9/linux/commit/4e79313a95d45950cab526456ef0030286ba4d4e
> 
> Did you do black-box testing after removing the code, or were you
> also able to independently confirm that the configurations done by
> cpu_port_config() were later overwritten? I'm trying to disambiguate
> between "works by coincidence" and "works because the analysis was
> correct".

I did my testing, merely to make sure we didn't miss anything as Russell 
already stated that the configuration from cpu_port_config() is later 
overwritten.

I could put some dev_info around to confirm the code path that 
overwrites the configuration.

Arınç