Module Name: src
Committed By: isaki
Date: Fri May 29 03:09:14 UTC 2020
Modified Files:
src/sys/dev/audio: audio.c audiovar.h
Log Message:
Fix suspend/resume.
- Revert temporary usage of sc_[pr]busy during suspend. These indicate
whether the mixer needs to be restarted or not.
- Avoid timeout error when about to suspend.
To generate a diff of this commit:
cvs rdiff -u -r1.74 -r1.75 src/sys/dev/audio/audio.c
cvs rdiff -u -r1.11 -r1.12 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.
Modified files:
Index: src/sys/dev/audio/audio.c
diff -u src/sys/dev/audio/audio.c:1.74 src/sys/dev/audio/audio.c:1.75
--- src/sys/dev/audio/audio.c:1.74 Tue May 26 15:20:16 2020
+++ src/sys/dev/audio/audio.c Fri May 29 03:09:14 2020
@@ -1,4 +1,4 @@
-/* $NetBSD: audio.c,v 1.74 2020/05/26 15:20:16 nia Exp $ */
+/* $NetBSD: audio.c,v 1.75 2020/05/29 03:09:14 isaki Exp $ */
/*-
* Copyright (c) 2008 The NetBSD Foundation, Inc.
@@ -138,7 +138,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: audio.c,v 1.74 2020/05/26 15:20:16 nia Exp $");
+__KERNEL_RCSID(0, "$NetBSD: audio.c,v 1.75 2020/05/29 03:09:14 isaki Exp $");
#ifdef _KERNEL_OPT
#include "audio.h"
@@ -1566,6 +1566,13 @@ audio_track_waitio(struct audio_softc *s
/* Wait for pending I/O to complete. */
error = cv_timedwait_sig(&track->mixer->outcv, sc->sc_lock,
mstohz(AUDIO_TIMEOUT));
+ if (sc->sc_suspending) {
+ /* If it's about to suspend, ignore timeout error. */
+ if (error == EWOULDBLOCK) {
+ TRACET(2, track, "timeout (suspending)");
+ return 0;
+ }
+ }
if (sc->sc_dying) {
error = EIO;
}
@@ -7754,13 +7761,18 @@ audio_suspend(device_t dv, const pmf_qua
error = audio_exlock_mutex_enter(sc);
if (error)
return error;
+ sc->sc_suspending = true;
audio_mixer_capture(sc);
if (sc->sc_pbusy) {
audio_pmixer_halt(sc);
+ /* Reuse this as need-to-restart flag while suspending */
+ sc->sc_pbusy = true;
}
if (sc->sc_rbusy) {
audio_rmixer_halt(sc);
+ /* Reuse this as need-to-restart flag while suspending */
+ sc->sc_rbusy = true;
}
#ifdef AUDIO_PM_IDLE
@@ -7782,15 +7794,28 @@ audio_resume(device_t dv, const pmf_qual
if (error)
return error;
+ sc->sc_suspending = false;
audio_mixer_restore(sc);
/* XXX ? */
AUDIO_INITINFO(&ai);
audio_hw_setinfo(sc, &ai, NULL);
- if (!sc->sc_pbusy)
+ /*
+ * During from suspend to resume here, sc_[pr]busy is used as
+ * need-to-restart flag temporarily. After this point,
+ * sc_[pr]busy is returned to its original usage (busy flag).
+ * And note that sc_[pr]busy must be false to call [pr]mixer_start().
+ */
+ if (sc->sc_pbusy) {
+ /* pmixer_start() requires pbusy is false */
+ sc->sc_pbusy = false;
audio_pmixer_start(sc, true);
- if (!sc->sc_rbusy && sc->sc_ropens > 0)
+ }
+ if (sc->sc_rbusy) {
+ /* rmixer_start() requires rbusy is false */
+ sc->sc_rbusy = false;
audio_rmixer_start(sc);
+ }
audio_exlock_mutex_exit(sc);
Index: src/sys/dev/audio/audiovar.h
diff -u src/sys/dev/audio/audiovar.h:1.11 src/sys/dev/audio/audiovar.h:1.12
--- src/sys/dev/audio/audiovar.h:1.11 Sat Mar 7 06:25:57 2020
+++ src/sys/dev/audio/audiovar.h Fri May 29 03:09:14 2020
@@ -1,4 +1,4 @@
-/* $NetBSD: audiovar.h,v 1.11 2020/03/07 06:25:57 isaki Exp $ */
+/* $NetBSD: audiovar.h,v 1.12 2020/05/29 03:09:14 isaki Exp $ */
/*-
* Copyright (c) 2002 The NetBSD Foundation, Inc.
@@ -235,6 +235,12 @@ struct audio_softc {
bool sc_dying;
/*
+ * Indicates that about to suspend.
+ * Must be protected by sc_lock.
+ */
+ bool sc_suspending;
+
+ /*
* If multiuser is false, other users who have different euid
* than the first user cannot open this device.
* Must be protected by sc_exlock.
