[alsa-devel] Follow Up: "Why my linux OS has only 8 sound cards ? How can I modify it ?"

[Takashi Iwai]

At Tue, 08 May 2012 16:15:24 +0200,
Maciej Paszta wrote:
> 
> Thanks!
> 
> Changing to 256 made all devices appear!

OK, I'll queue the fixes for 3.5 kernel.


thanks,

Takashi

> On 2012-05-08 15:32, Takashi Iwai wrote:
> > At Tue, 08 May 2012 15:02:33 +0200,
> > Clemens Ladisch wrote:
> >> Maciej Paszta wrote:
> >>> Quick reminder: I have  10 sound cards which need to have oss emulation
> >>> enabled. However, I only see 8 devices (dsp-dsp7). Takashi suggested a
> >>> patch to workaround this problem:
> >>> http://mailman.alsa-project.org/pipermail/alsa-devel/2011-November/045764.html
> >>> I've applied it to kernel 3.0.0 and the only result I get is message
> >>> appearing in kernel logs: "unable to register OSS PCM device 8:0". I've
> >>> done some debugging and the registration fails on these lines
> >>> (sound/core/sound_oss.c):
> >>> register1 = register_sound_special_device(f_ops, minor, carddev);
> >> Try replacing 128 with 256 in register_sound_special_device() in
> >> sound/sound_core.c.
> > Actually it should be 256, instead of 256 + unit, like the patch below.
> >
> >
> > Takashi
> >
> > ---
> > diff --git a/sound/sound_core.c b/sound/sound_core.c
> > index c6e81fb..fb9255c 100644
> > --- a/sound/sound_core.c
> > +++ b/sound/sound_core.c
> > @@ -361,7 +361,7 @@ int register_sound_special_device(const struct file_operations *fops, int unit,
> >   				  struct device *dev)
> >   {
> >   	const int chain = unit % SOUND_STEP;
> > -	int max_unit = 128 + chain;
> > +	int max_unit = 256;
> >   	const char *name;
> >   	char _name[16];
> >
> > _______________________________________________
> > Alsa-devel mailing list
> > Alsa-devel at alsa-project.org
> > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
> 
> 
> -- 
> Maciej Paszta
> Mobile Systems Research Labs, Poznan University of Technology
> 
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