ASoc / PCM recording-related regression between v5.4 and v5.5

[Kuninori Morimoto]

Hi

> I am trying to find the cause of a rather unusual regression between kernel v5.4 and v5.5,
> for an out-of-tree driver on the raspberrypi.

I think out-of-tree code needs update.
We merged snd_pcm_ops into component between v5.4 - v5.5

	e2cb4a14541dba3587bb78e0f62da27a0e1ad399
    	("ASoC: soc-core: merge snd_pcm_ops member to component driver")

And all drivers which used it was updated.
For example,

	1fddf424b3c49a475ca7c23662f515b53f884172
	("ASoC: mediatek: remove snd_pcm_ops")

And snd_pcm_ops is no longer used on ALSA SoC

	e9067bb502787869dabe385727baff233024097b
	("ASoC: soc-component: remove snd_pcm_ops from component driver")

If your out-of-tree is using it, and not yet updated,
some issue can be happen, I think.


Thank you for your help !!

Best regards
---
Kuninori Morimoto