CVS commit: src/sys/dev/audio

["Tetsuya Isaki" <isaki%netbsd.org@localhost>]

Module Name:    src
Committed By:   isaki
Date:           Tue Feb  9 12:36:34 UTC 2021

Modified Files:
        src/sys/dev/audio: audio.c

Log Message:
Protect also audioopen() and audiobellopen() from audiodetach() with
psref(9), as well as others(audioread, audiowrite, etc..).
- Rename audio_file_enter to audio_sc_acquire_fromfile, audio_file_exit
  to audio_sc_release, for clarify.  These are the reference counter for
  this sc.
- Introduce audio_sc_acquire_foropen for audio{,bell}open.
- audio_open needs to examine sc_dying again before inserting it into
  sc_files, in order to keep sc_files consistency.
The race between audiodetach and audioopen is pointed out by riastradh@.
Thank you for many advices.


To generate a diff of this commit:
cvs rdiff -u -r1.89 -r1.90 src/sys/dev/audio/audio.c

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