linux-kernel - Re: [PATCH] arm64: dts: mt7622: fix switch probe on bananapi-r64

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Message-ID: <130518e2-d6dd-49ed-9cc2-ca9cdec93b98@leemhuis.info>
Date: Mon, 1 Jul 2024 10:04:21 +0200
From: "Linux regression tracking (Thorsten Leemhuis)"
 <regressions@...mhuis.info>
To: Arınç ÜNAL <arinc.unal@...nc9.com>,
 Linux regressions mailing list <regressions@...ts.linux.dev>,
 Paolo Abeni <pabeni@...hat.com>, "David S. Miller" <davem@...emloft.net>,
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
 Jakub Kicinski <kuba@...nel.org>
Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org,
 Daniel Golle <daniel@...rotopia.org>, frank-w@...lic-files.de,
 Frank Wunderlich <linux@...web.de>, Rob Herring <robh@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Krzysztof Kozlowski
 <krzk+dt@...nel.org>, Matthias Brugger <matthias.bgg@...il.com>
Subject: Re: [PATCH] arm64: dts: mt7622: fix switch probe on bananapi-r64

On 01.07.24 09:44, Arınç ÜNAL wrote:
> On 01/07/2024 09:16, Linux regression tracking (Thorsten Leemhuis) wrote:
>> [CCing the other net maintainers]
>>
>> On 25.06.24 10:51, AngeloGioacchino Del Regno wrote:
>>> Il 25/06/24 07:56, Linux regression tracking (Thorsten Leemhuis) ha
>>> scritto:
>>>> On 17.06.24 13:08, Arınç ÜNAL wrote:
>>>>> On 17/06/2024 11:33, Linux regression tracking (Thorsten Leemhuis)
>>>>> wrote:
>>>>> [...]
>>>> It looks more and more like we are stuck here (or was there progress
>>>> and
>>>> I just missed it?) while the 6.10 final is slowly getting closer.
>>>> Hence:
>>>>
>>>> AngeloGioacchino, should we ask the net maintainers to revert
>>>> 868ff5f4944aa9 ("net: dsa: mt7530-mdio: read PHY address of switch from
>>>> device tree") for now to resolve this regression? Reminder, there is
>>>> nothing wrong with that commit per se afaik, it just exposes a problem
>>>> that needs to be fixed first before it can be reapplied.
>>>
>>> To be clear on this: I asked for the commit to be fixed such that it
>>> guarantees
>>> backwards compatibility with older device trees.
>>>
>>> If no fix comes,
>>
>> I haven't see any since that mail, did you? If not, I think...
>>
>>> then I guess that we should ask them to revert this commit
>>> until a fix is available.
>>
>> ...it's time to ask them for the revert to resolve this for -rc7 (and
>> avoid a last minute revert), or what do you think?
> 
> This is quite frustrating. I absolutely won't consent to a revert. [...]

Reminder: try to not see a revert as a bad thing. It's just means "not
ready yet, revert and we'll try again later" -- that's actually
something Linus wrote just a few hours ago:
https://lore.kernel.org/lkml/CAHk-=wgQMOscLeeA3QXOs97xOz_CTxdqJjpC20tJ-7bUdHWtSA@mail.gmail.com/

Ciao, Thorsten