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Subject[PATCH] 10/10 sound/oss/dmasound/dmasound_q40.c
From
--- vanilla-2.5.33/sound/oss/dmasound/dmasound_q40.c	Sun Sep  8 21:52:50 2002
+++ linux-2.5-cli-oss/sound/oss/dmasound/dmasound_q40.c Mon Sep 9 00:41:06 2002
@@ -18,7 +18,7 @@
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/soundcard.h>
-
+#include <linux/spinlock.h>
#include <asm/uaccess.h>
#include <asm/q40ints.h>
#include <asm/q40_master.h>
@@ -49,8 +49,7 @@
static int Q40SetVolume(int volume);
static void Q40PlayNextFrame(int index);
static void Q40Play(void);
-static void Q40StereoInterrupt(int irq, void *dummy, struct pt_regs *fp);
-static void Q40MonoInterrupt(int irq, void *dummy, struct pt_regs *fp);
+static void Q40InterruptHandler(int irq, void *dummy, struct pt_regs *fp);
static void Q40Interrupt(void);


@@ -384,7 +383,7 @@
static int __init Q40IrqInit(void)
{
/* Register interrupt handler. */
- request_irq(Q40_IRQ_SAMPLE, Q40StereoInterrupt, 0,
+ request_irq(Q40_IRQ_SAMPLE, Q40InterruptHandler, 0,
"DMA sound", Q40Interrupt);

return(1);
@@ -430,23 +429,13 @@
speed=(dmasound.hard.speed==10000 ? 0 : 1);

master_outb( 0,SAMPLE_ENABLE_REG);
- free_irq(Q40_IRQ_SAMPLE, Q40Interrupt);
- if (dmasound.soft.stereo)
- request_irq(Q40_IRQ_SAMPLE, Q40StereoInterrupt, 0,
- "Q40 sound", Q40Interrupt);
- else
- request_irq(Q40_IRQ_SAMPLE, Q40MonoInterrupt, 0,
- "Q40 sound", Q40Interrupt);
-
master_outb( speed, SAMPLE_RATE_REG);
master_outb( 1,SAMPLE_CLEAR_REG);
master_outb( 1,SAMPLE_ENABLE_REG);
}

-static void Q40Play(void)
+static void __Q40Play(void)
{
- unsigned long flags;
-
if (write_sq.active || write_sq.count<=0 ) {
/* There's already a frame loaded */
return;
@@ -459,29 +448,35 @@
*/
return;
}
- save_flags(flags); cli();
Q40PlayNextFrame(1);
- restore_flags(flags);
}

-static void Q40StereoInterrupt(int irq, void *dummy, struct pt_regs *fp)
-{
- if (q40_sc>1){
- *DAC_LEFT=*q40_pp++;
- *DAC_RIGHT=*q40_pp++;
- q40_sc -=2;
- master_outb(1,SAMPLE_CLEAR_REG);
- }else Q40Interrupt();
-}
-static void Q40MonoInterrupt(int irq, void *dummy, struct pt_regs *fp)
+static void Q40Play(void)
{
- if (q40_sc>0){
- *DAC_LEFT=*q40_pp;
- *DAC_RIGHT=*q40_pp++;
- q40_sc --;
+ unsigned long flags;
+ spin_lock_irqsave(&dmasound.lock, flags);
+ __Q40Play();
+ spin_unlock_irqrestore(&dmasound.lock, flags);
+}
+
+static void Q40InterruptHandler(int irq, void *dummy, struct pt_regs *fp)
+{
+ spin_lock(&dmasound.lock);
+ if (q40_sc>1){
+ if (dmasound.soft.stereo){
+ *DAC_LEFT=*q40_pp++;
+ *DAC_RIGHT=*q40_pp++;
+ q40_sc -=2;
+ } else {
+ *DAC_LEFT=*q40_pp;
+ *DAC_RIGHT=*q40_pp++;
+ q40_sc --;
+ }
master_outb(1,SAMPLE_CLEAR_REG);
}else Q40Interrupt();
+ spin_unlock(&dmasound.lock);
}
+
static void Q40Interrupt(void)
{
if (!write_sq.active) {
@@ -493,7 +488,7 @@
goto exit;
} else write_sq.active=0;
write_sq.count--;
- Q40Play();
+ __Q40Play();

if (q40_sc<2)
{ /* there was nothing to play, disable irq */
-
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