CVS commit: [netbsd-9] src/sys/dev/audio

["Martin Husemann" <martin%netbsd.org@localhost>]

Module Name:    src
Committed By:   martin
Date:           Thu Apr 30 16:05:18 UTC 2020

Modified Files:
        src/sys/dev/audio [netbsd-9]: audio.c audiovar.h

Log Message:
Pull up following revision(s) (requested by isaki in ticket #877):

        sys/dev/audio/audio.c: revision 1.55
        sys/dev/audio/audio.c: revision 1.41
        sys/dev/audio/audio.c: revision 1.48
        sys/dev/audio/audiovar.h: revision 1.7
        sys/dev/audio/audio.c: revision 1.63 (via patch)
        sys/dev/audio/audiovar.h: revision 1.11
        sys/dev/audio/audio.c: revision 1.64

Simplify async_mixer handling.
- It makes FIOASYNC code in mixer_ioctl() symmetric.
- For readability, mixer_async_{add,remove}() should take pid argument
  though pid is always curproc.

hw_if->query_format is already mandatory method.  Drop null checks.

Improve error handling around audio_hw_probe().
It was difficult to return multiple errors.

Split sc_lock and sc_exlock.

Most (probably all) malloc/free (or routines which may sleep) now can be
called without holding mutex.
Pointed out by riastradh@.

Fix/Update comments about allocm/freem.


To generate a diff of this commit:
cvs rdiff -u -r1.28.2.11 -r1.28.2.12 src/sys/dev/audio/audio.c
cvs rdiff -u -r1.4.2.2 -r1.4.2.3 src/sys/dev/audio/audiovar.h

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.