[src/trunk]: src/sys/dev Only init the mix ring if sc_usemixer is enabled as ...

[nat <nat%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/e674767c43b9
branches:  trunk
changeset: 358192:e674767c43b9
user:      nat <nat%NetBSD.org@localhost>
date:      Sat Dec 16 15:56:00 2017 +0000

description:
Only init the mix ring if sc_usemixer is enabled as with mixing set to
false the mix ring is not used.

diffstat:

 sys/dev/audio.c |  8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diffs (31 lines):

diff -r 5a6623979f12 -r e674767c43b9 sys/dev/audio.c
--- a/sys/dev/audio.c   Sat Dec 16 14:45:25 2017 +0000
+++ b/sys/dev/audio.c   Sat Dec 16 15:56:00 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: audio.c,v 1.442 2017/11/30 20:25:54 christos Exp $     */
+/*     $NetBSD: audio.c,v 1.443 2017/12/16 15:56:00 nat Exp $  */
 
 /*-
  * Copyright (c) 2016 Nathanial Sloss <nathanialsloss%yahoo.com.au@localhost>
@@ -148,7 +148,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: audio.c,v 1.442 2017/11/30 20:25:54 christos Exp $");
+__KERNEL_RCSID(0, "$NetBSD: audio.c,v 1.443 2017/12/16 15:56:00 nat Exp $");
 
 #ifdef _KERNEL_OPT
 #include "audio.h"
@@ -2223,10 +2223,10 @@
                        }
                }
                audio_initbufs(sc, NULL);
-               if (audio_can_playback(sc))
+               if (sc->sc_usemixer && audio_can_playback(sc))
                        audio_init_ringbuffer(sc, &sc->sc_mixring.sc_mpr,
                            AUMODE_PLAY);
-               if (audio_can_capture(sc))
+               if (sc->sc_usemixer && audio_can_capture(sc))
                        audio_init_ringbuffer(sc, &sc->sc_mixring.sc_mrr,
                            AUMODE_RECORD);
                sc->schedule_wih = false;