Module Name: src
Committed By: nat
Date: Sat Jan 14 20:05:38 UTC 2017
Modified Files:
src/sys/dev: audio.c
Log Message:
Increment sc_opens only after channel is set up.
It should help PR kern/51746: Panics from audio.
To generate a diff of this commit:
cvs rdiff -u -r1.289 -r1.290 src/sys/dev/audio.c
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.c
diff -u src/sys/dev/audio.c:1.289 src/sys/dev/audio.c:1.290
--- src/sys/dev/audio.c:1.289 Mon Jan 2 00:16:45 2017
+++ src/sys/dev/audio.c Sat Jan 14 20:05:37 2017
@@ -1,4 +1,4 @@
-/* $NetBSD: audio.c,v 1.289 2017/01/02 00:16:45 nat Exp $ */
+/* $NetBSD: audio.c,v 1.290 2017/01/14 20:05:37 nat Exp $ */
/*-
* Copyright (c) 2016 Nathanial Sloss <nathanialsl...@yahoo.com.au>
@@ -148,7 +148,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: audio.c,v 1.289 2017/01/02 00:16:45 nat Exp $");
+__KERNEL_RCSID(0, "$NetBSD: audio.c,v 1.290 2017/01/14 20:05:37 nat Exp $");
#include "audio.h"
#if NAUDIO > 0
@@ -1783,7 +1783,7 @@ audio_initbufs(struct audio_softc *sc, i
(sc->sc_vchan[n]->sc_open & AUOPEN_READ)) {
audio_init_ringbuffer(sc, &sc->sc_vchan[n]->sc_mrr,
AUMODE_RECORD);
- if (sc->sc_opens == 1 && hw->init_input &&
+ if (sc->sc_opens == 0 && hw->init_input &&
(sc->sc_vchan[n]->sc_mode & AUMODE_RECORD)) {
error = hw->init_input(sc->hw_hdl, vc->sc_mrr.s.start,
vc->sc_mrr.s.end - vc->sc_mrr.s.start);
@@ -1797,7 +1797,7 @@ audio_initbufs(struct audio_softc *sc, i
audio_init_ringbuffer(sc, &sc->sc_vchan[n]->sc_mpr,
AUMODE_PLAY);
sc->sc_vchan[n]->sc_sil_count = 0;
- if (sc->sc_opens == 1 && hw->init_output &&
+ if (sc->sc_opens == 0 && hw->init_output &&
(sc->sc_vchan[n]->sc_mode & AUMODE_PLAY)) {
error = hw->init_output(sc->hw_hdl, vc->sc_mpr.s.start,
vc->sc_mpr.s.end - vc->sc_mpr.s.start);
@@ -1921,9 +1921,6 @@ audio_open(dev_t dev, struct audio_softc
return EBUSY;
}
- sc->sc_opens++;
- sc->sc_audiopid[n].pid = curproc->p_pid;
- sc->sc_despid[n].pid = curproc->p_pid;
error = audio_alloc_ring(sc, &vc->sc_mpr,
AUMODE_PLAY, AU_RING_SIZE);
if (!error) {
@@ -1931,22 +1928,16 @@ audio_open(dev_t dev, struct audio_softc
AUMODE_RECORD, AU_RING_SIZE);
}
if (error) {
- sc->sc_opens--;
- sc->sc_audiopid[n].pid = -1;
- sc->sc_despid[n].pid = -1;
kmem_free(vc, sizeof(struct virtual_channel));
return error;
}
- if (sc->sc_opens == 1) {
+ if (sc->sc_opens == 0) {
if (hw->open != NULL) {
mutex_enter(sc->sc_intr_lock);
error = hw->open(sc->hw_hdl, flags);
mutex_exit(sc->sc_intr_lock);
if (error) {
- sc->sc_opens--;
- sc->sc_audiopid[n].pid = -1;
- sc->sc_despid[n].pid = -1;
kmem_free(vc,
sizeof(struct virtual_channel));
return error;
@@ -1972,7 +1963,6 @@ audio_open(dev_t dev, struct audio_softc
if (flags & FREAD) {
vc->sc_open |= AUOPEN_READ;
mode |= AUMODE_RECORD;
- sc->sc_recopens++;
}
if (flags & FWRITE) {
vc->sc_open |= AUOPEN_WRITE;
@@ -2012,6 +2002,11 @@ audio_open(dev_t dev, struct audio_softc
DPRINTF(("audio_open: done sc_mode = 0x%x\n", vc->sc_mode));
mutex_enter(sc->sc_intr_lock);
+ if (flags & FREAD)
+ sc->sc_recopens++;
+ sc->sc_opens++;
+ sc->sc_audiopid[n].pid = curproc->p_pid;
+ sc->sc_despid[n].pid = curproc->p_pid;
sc->sc_nmixer_states += 2;
mutex_exit(sc->sc_intr_lock);
