Re: [PATCH v4 0/3] ALSA: usb-audio: Add QUIRK_FLAG_MIXER_GET_CUR_BROKEN

[Takashi Iwai]

On Fri, 05 Jun 2026 14:00:02 +0200,
Thorsten Leemhuis wrote:
> 
> On 5/31/26 17:50, Takashi Iwai wrote:
> > On Sun, 31 May 2026 17:45:19 +0200,
> > Rong Zhang wrote:
> >>
> >> Since commit 86aa1ea1f15c ("ALSA: usb-audio: Do not expose sticky
> >> mixers"), the UAC mixer core utilizes volume SET_CUR and GET_CUR to
> >> identify devices with sticky mixers. Unfortunately, even though most
> >> devices with sticky GET_CUR also have corresponding sticky SET_CUR,
> >> which I actually met more since the commit had been merged, there is
> >> also a rare case that some devices may have volume mixers that responds
> >> to SET_CUR properly but with its GET_CUR stubbed. This cause the sticky
> >> check to consider the mixer to be sticky and unnecessarily disable it.
> > [...]
> >
> > Now took all three patches onto for-next branch.  Thanks.
> 
> I noticed that patch 1 is somewhat on the larger side, nevertheless
> allow me to ask: wouldn't it be better to mainline this for -rc7, as
> this fixes a regression from the 7.1 cycle? Or did I misjudge this? Then
> don't hesitate to tell me!

A regression fix will be included in the upcoming PR by another commit
aa2f4addab44407c7aa742321de5dc1914ab5762.


Takashi