Re: mixer ioctls on sound devices

["Jared D. McNeill" <jmcneill%invisible.ca@localhost>]

On Wed, 30 Jan 2008, Stephen Borrill wrote:
> However, it might be felt that this is not the right place to do this pass 
> through (i.e. should we natively support mixer operations on /dev/sound0?). 
> Perhaps it should be in compat/ossaudio/ossaudio.c or even 
> compat/linux/common/linux_ioctl.c. Or perhaps audio_ioctl should return 
> EPASSTHROUGH in such a situation.
>
> Opinions?

We've spoken about this privately, but I should probably say this on the 
list anyway for an audit trail..

I have concerns with making our own audio subsystem behave this way, as it 
makes mixer controls via /dev/sound behave differently than /dev/mixer 
(cf. FIOASYNC).

For Linux compatibility, we might be better off calling mixer_ioctl 
directly from ossaudio rather than using ioctlf on the currently open 
device.

Cheers,
Jared