[PATCH] ALSA: hda: avoid write to STATESTS if controller is in reset

[Takashi Iwai]

On Tue, 12 Oct 2021 17:48:12 +0200,
Kai Vehmanen wrote:
> 
> Hi,
> 
> On Tue, 12 Oct 2021, Takashi Iwai wrote:
> 
> > > The snd_hdac_bus_reset_link() contains logic to clear STATESTS register
> > > before performing controller reset. This code dates back to an old
> > > bugfix in commit e8a7f136f5ed ("[ALSA] hda-intel - Improve HD-audio
> > > codec probing robustness"). Originally the code was added to
> > > azx_reset().
> [...]
> > Do we have a bug reference?  I guess it worth to be pushed to 5.15-rc
> > and Cc-to-stable, if this is hitting already on the recent machines.
> 
> I unfortunately don't have a public bug reference to share. This will 
> impact PCIe based Intel hardware like DG1. The DRM support is quite 
> recent for these, so in practise this only affects 5.15-rc and newer.
> 
> And even on these, the functionality will be ok, it's just the warnings 
> that fill the kernel log that are a problem.

OK, then I'll push this without Cc to stable.


thanks,

Takashi