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ASoC/soundwire/qdsp6/wcd: fix leaks and probe deferral

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Merge series from Johan Hovold <johan+linaro@kernel.org>:

I've been hitting a race during boot which breaks probe of the sound
card on the Lenovo ThinkPad X13s as I've previously reported here:

	https://lore.kernel.org/all/ZIHMMFtuDtvdpFAZ@hovoldconsulting.com/

The immediate issue appeared to be a probe deferral that was turned into
a hard failure, but addressing that in itself only made things worse as
it exposed further bugs.

I was hoping someone more familiar with the code in question would look
into this, but as this affects users of the X13s and breaks audio on my
machine every fifth boot or so, I decided to investigate it myself.

As expected, the Qualcomm codec drivers are broken and specifically leak
resources on component remove, which in turn breaks sound card probe
deferrals.

The source of the deferral itself appears to be legitimate and was
simply due to some audio component not yet having been registered due to
random changes in timing during boot.

These issues can most easily be reproduced by simply blacklisting the
q6apm_dai module and loading it manually after boot.

Included are also two patches that suppresses error messages on
component probe deferral to avoid spamming the logs during boot.
This commit is contained in:
Mark Brown 2023-07-06 16:03:07 +01:00
commit 980d97efdb
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6 changed files with 118 additions and 30 deletions
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