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From:   Len Brown <lenb@kernel.org>
Date:   Wed, 12 Jan 2022 09:58:59 -0500
Message-ID: <CAJvTdKmXuzwhV+ExqPAAUTgOFk1dnU+CjnErgUgdfXp=vug_EQ@mail.gmail.com>
Subject: Re: iwlwifi 0000:3a:00.0: Microcode SW error detected. Restarting 0x2000000.
To:     "Coelho, Luciano" <luciano.coelho@intel.com>
Cc:     "johannes@sipsolutions.net" <johannes@sipsolutions.net>,
        "linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>
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On Wed, Jan 12, 2022 at 4:05 AM Coelho, Luciano
<luciano.coelho@intel.com> wrote:

> There was some refactoring in this area, to move the initialization to
> the init phase, and that must be causing this.  I suspect this patch:
>
> commit 78a19d5285d93e281b40c3b8d5a959fbbd2fe006
> Author:     Miri Korenblit <miriam.rachel.korenblit@intel.com>
> AuthorDate: Thu Aug 5 14:21:56 2021 +0300
> Commit:     Luca Coelho <luciano.coelho@intel.com>
> CommitDate: Thu Aug 26 23:36:10 2021 +0300
>
>     iwlwifi: mvm: Read the PPAG and SAR tables at INIT stage
>
> ...which was introduced in v5.15.

good guess!
I have confirmed that upstream 5.14 works, and that 5.15 with the
commit above reverted works.