[src/trunk]: src/sys/dev Don't start playback or recording on the hw ring onl...

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

details:   https://anonhg.NetBSD.org/src/rev/f90dd0594385
branches:  trunk
changeset: 354679:f90dd0594385
user:      nat <nat%NetBSD.org@localhost>
date:      Sun Jun 25 09:42:40 2017 +0000

description:
Don't start playback or recording on the hw ring only stream ring buffers.

diffstat:

 sys/dev/audio.c |  10 ++++++++--
 1 files changed, 8 insertions(+), 2 deletions(-)

diffs (47 lines):

diff -r 650e28145e51 -r f90dd0594385 sys/dev/audio.c
--- a/sys/dev/audio.c   Sun Jun 25 09:40:17 2017 +0000
+++ b/sys/dev/audio.c   Sun Jun 25 09:42:40 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: audio.c,v 1.364 2017/06/25 02:47:28 nat Exp $  */
+/*     $NetBSD: audio.c,v 1.365 2017/06/25 09:42:40 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 1.364 2017/06/25 02:47:28 nat Exp $");
+__KERNEL_RCSID(0, "$NetBSD: audio.c,v 1.365 2017/06/25 09:42:40 nat Exp $");
 
 #ifdef _KERNEL_OPT
 #include "audio.h"
@@ -3485,6 +3485,7 @@
 audiostartr(struct audio_softc *sc, struct virtual_channel *vc)
 {
 
+       struct audio_chan *chan;
        int error;
 
        KASSERT(mutex_owned(sc->sc_lock));
@@ -3493,8 +3494,11 @@
                 vc->sc_mrr.s.start, audio_stream_get_used(&vc->sc_mrr.s),
                 vc->sc_mrr.usedhigh, vc->sc_mrr.mmapped));
 
+       chan = SIMPLEQ_FIRST(&sc->sc_audiochan);
        if (!audio_can_capture(sc))
                return EINVAL;
+       if (vc == chan->vc)
+               return 0;
 
        error = 0;
        if (sc->sc_rec_started == false) {
@@ -3525,6 +3529,8 @@
 
        if (!audio_can_playback(sc))
                return EINVAL;
+       if (vc == chan->vc)
+               return 0;
 
        if (!vc->sc_mpr.mmapped && used < vc->sc_mpr.blksize) {
                cv_broadcast(&sc->sc_wchan);