[alsa-devel] OOPS: Vmaster not freed on reconfig

[Takashi Iwai]

At Tue, 08 Nov 2011 17:36:02 +0100,
Takashi Iwai wrote:
> 
> At Tue, 08 Nov 2011 17:16:56 +0100,
> David Henningsson wrote:
> > 
> > Hi,
> > 
> > I'm playing around with the reconfig functions of snd-hda-codec and got 
> > an OOPS in slave_put. I tried to research this, and I think I've nailed 
> > down the problem: the vmaster is not freed on reconfig (presumably, it 
> > should be fixed in hda_codec.c:snd_hda_ctls_clear).
> 
> Hmm, I don't figure out how it happens.
> The vmaster is added to the list via snd_hda_add_vmaster() by calling
> snd_hda_ctl_add().
> 
> > I'm a little unsure of whether the best thing is to just add it to 
> > codec.mixers, keep them in a separate array, or something else. What do 
> > you think?
> > 
> > (It's on 3.0, it's a sigmatel/IDT, and I've got the screen captured by a 
> > camera if anyone is interested.)
> 
> Yes, it'd be interesting.  If the bug is easily reproducible, you can
> capture the oops text by netconsole, too.

Also, please give alsa-info.sh output (or equivalent) that triggers
the problem.  I'll try to debug with hda-emu at first.


thanks,

Takashi