I have updated the audio driver (/sys/dev/audio.c) so that it can now
attach more than one device.  In order to do this, I had to make two
changes to the hardware interface (/sys/dev/audio_if.h).  They are:

1) The hardware open function in struct audio_hw_if changes from

	int	(*open)__P((dev_t, int));

to

	int	(*open)__P((void *, dev_t, int));

The additional pointer is the hardware handle which was passed to
audio_hardware_attach() during autoconfig.  This change eliminates some
bogus hardware open functions (e.g. sbopen(), wssopen()) that try
to compare /dev/audio's minor number to their own unit number.

2) The audio_hardware_detach() function changes from

extern int	audio_hardware_detach __P((struct audio_hw_if *));

to

extern int	audio_hardware_detach __P((void *));

The argument must be the same as the hardware handle originally passed
to audio_hardware_attach() as its second argument.  This change is
needed so that audio_hardware_detach() can distinguish between
multiple instances of identical hardware, e.g. sb0 and sb1.


My questions are:

1) Does anyone have any problem with these changes?
2) Should I send-pr my changes now, or wait until after 1.2 is
   released?
3) Should I update non-isa audio drivers, or should I leave that to
   those who can actually test the changes?
4) Is anyone in particular actively maintaining the GUS driver?  I
   noticed a few...problems...with it while I was updating the
   others.  Ditto for the PSS driver, but I'm probably stuck with that
   one. :-)  SB and WSS both work.

I await your comments.
-- 
Mike Long <mike.long@analog.com>     <URL:http://www.shore.net/~mikel>
VLSI Design Engineer         finger mikel@shore.net for PGP public key
Analog Devices, CPD Division          CCBF225E7D3F7ECB2C8F7ABB15D9BE7B
Norwood, MA 02062 USA       (eq (opinion 'ADI) (opinion 'mike)) -> nil