Crash in acpi_ns_validate_handle triggered by soundwire on Linux 5.10

[Pierre-Louis Bossart]

> 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.