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Subject: Re: Crash in acpi_ns_validate_handle triggered by soundwire on Linux
 5.10
To:     =?UTF-8?Q?Marcin_=c5=9alusarz?= <marcin.slusarz@gmail.com>
Cc:     "moderated list:SOUND - SOC LAYER / DYNAMIC AUDIO POWER MANAGEM..." 
        <alsa-devel@alsa-project.org>,
        "Rafael J. Wysocki" <rafael@kernel.org>,
        "Rafael J. Wysocki" <rjw@rjwysocki.net>,
        ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
        Vinod Koul <vkoul@kernel.org>,
        Bard Liao <yung-chuan.liao@linux.intel.com>,
        Len Brown <lenb@kernel.org>
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From:   Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
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Date:   Wed, 27 Jan 2021 11:28:25 -0600
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> Weird, I can't reproduce this problem with my self-compiled kernel :/
> I don't even see soundwire modules loaded in. Manually loading them of course
> doesn't do much.
> 
> Previously I could boot into the "faulty" kernel by using "recovery mode", but
> I can't do that anymore - it crashes too.
> 
> Maybe there's some kind of race and this bug depends on some specific
> ordering of events?

missing Kconfig?
You need CONFIG_SOUNDWIRE and CONFIG_SND_SOC_SOF_INTEL_SOUNDWIRE 
selected to enter this sdw_intel_acpi_scan() routine.