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Date: Thu, 29 Aug 2002 21:56:27 +0200
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Subject: [PATCH] 2/10 sound/oss/gus_wave.c
From: pwaechtler@mac.com
To: linux-kernel@vger.kernel.org
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Cc: torvalds@transmeta.com
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--- vanilla-2.5.33/sound/oss/gus_wave.c	Sat Aug 10 00:04:14 2002
+++ linux-2.5-cli-oss/sound/oss/gus_wave.c	Fri Aug 16 14:34:30 2002
@@ -19,6 +19,7 @@
  
 #include <linux/init.h> 
 #include <linux/config.h>
+#include <linux/spinlock.h>
 
 #define GUSPNP_AUTODETECT
 
@@ -138,6 +139,7 @@
 static unsigned long pcm_current_buf;
 static int      pcm_current_count;
 static int      pcm_current_intrflag;
+static spinlock_t lock=SPIN_LOCK_UNLOCKED;
 
 extern int     *gus_osp;
 
@@ -226,8 +228,6 @@
 {				/* Writes a byte to the DRAM */
 	unsigned long   flags;
 
-	save_flags(flags);
-	cli();
 	outb((0x43), u_Command);
 	outb((addr & 0xff), u_DataLo);
 	outb(((addr >> 8) & 0xff), u_DataHi);
@@ -235,16 +235,12 @@
 	outb((0x44), u_Command);
 	outb(((addr >> 16) & 0xff), u_DataHi);
 	outb((data), u_DRAMIO);
-	restore_flags(flags);
 }
 
 static unsigned char gus_peek(long addr)
 {				/* Reads a byte from the DRAM */
-	unsigned long   flags;
 	unsigned char   tmp;
 
-	save_flags(flags);
-	cli();
 	outb((0x43), u_Command);
 	outb((addr & 0xff), u_DataLo);
 	outb(((addr >> 8) & 0xff), u_DataHi);
@@ -252,35 +248,23 @@
 	outb((0x44), u_Command);
 	outb(((addr >> 16) & 0xff), u_DataHi);
 	tmp = inb(u_DRAMIO);
-	restore_flags(flags);
 
 	return tmp;
 }
 
 void gus_write8(int reg, unsigned int data)
 {				/* Writes to an indirect register (8 bit) */
-	unsigned long   flags;
-
-	save_flags(flags);
-	cli();
-
 	outb((reg), u_Command);
 	outb(((unsigned char) (data & 0xff)), u_DataHi);
-
-	restore_flags(flags);
 }
 
 static unsigned char gus_read8(int reg)
 {				
 	/* Reads from an indirect register (8 bit). Offset 0x80. */
-	unsigned long   flags;
 	unsigned char   val;
 
-	save_flags(flags);
-	cli();
 	outb((reg | 0x80), u_Command);
 	val = inb(u_DataHi);
-	restore_flags(flags);
 
 	return val;
 }
@@ -288,14 +272,10 @@
 static unsigned char gus_look8(int reg)
 {
 	/* Reads from an indirect register (8 bit). No additional offset. */
-	unsigned long   flags;
 	unsigned char   val;
 
-	save_flags(flags);
-	cli();
 	outb((reg), u_Command);
 	val = inb(u_DataHi);
-	restore_flags(flags);
 
 	return val;
 }
@@ -303,54 +283,35 @@
 static void gus_write16(int reg, unsigned int data)
 {
 	/* Writes to an indirect register (16 bit) */
-	unsigned long   flags;
-
-	save_flags(flags);
-	cli();
-
 	outb((reg), u_Command);
 
 	outb(((unsigned char) (data & 0xff)), u_DataLo);
 	outb(((unsigned char) ((data >> 8) & 0xff)), u_DataHi);
-
-	restore_flags(flags);
 }
 
 static unsigned short gus_read16(int reg)
 {
 	/* Reads from an indirect register (16 bit). Offset 0x80. */
-	unsigned long   flags;
 	unsigned char   hi, lo;
 
-	save_flags(flags);
-	cli();
-
 	outb((reg | 0x80), u_Command);
 
 	lo = inb(u_DataLo);
 	hi = inb(u_DataHi);
 
-	restore_flags(flags);
-
 	return ((hi << 8) & 0xff00) | lo;
 }
 
 static unsigned short gus_look16(int reg)
 {		
 	/* Reads from an indirect register (16 bit). No additional offset. */
-	unsigned long   flags;
 	unsigned char   hi, lo;
 
-	save_flags(flags);
-	cli();
-
 	outb((reg), u_Command);
 
 	lo = inb(u_DataLo);
 	hi = inb(u_DataHi);
 
-	restore_flags(flags);
-
 	return ((hi << 8) & 0xff00) | lo;
 }
 
@@ -358,10 +319,7 @@
 {
 	/* Writes an 24 bit memory address */
 	unsigned long   hold_address;
-	unsigned long   flags;
 
-	save_flags(flags);
-	cli();
 	if (is16bit)
 	{
 		if (iw_mode)
@@ -389,7 +347,6 @@
 	gus_write16(reg, (unsigned short) ((address >> 7) & 0xffff));
 	gus_write16(reg + 1, (unsigned short) ((address << 9) & 0xffff)
 		    + (frac << 5));
-	restore_flags(flags);
 }
 
 static void gus_select_voice(int voice)
@@ -514,8 +471,7 @@
 {
 	unsigned long   flags;
 
-	save_flags(flags);
-	cli();
+	spin_lock_irqsave(&lock, flags);
 	gus_select_voice(voice);
 	gus_voice_volume(0);
 	gus_voice_off();
@@ -524,7 +480,7 @@
 	gus_write8(0x0d, 0x03);	/* Ramping off */
 	voice_alloc->map[voice] = 0;
 	voice_alloc->alloc_times[voice] = 0;
-	restore_flags(flags);
+	spin_unlock_irqrestore(&lock, flags);
 
 }
 
@@ -558,11 +514,10 @@
 
 	if (voices[voice].mode & WAVE_SUSTAIN_ON && voices[voice].env_phase == 2)
 	{
-		save_flags(flags);
-		cli();
+		spin_lock_irqsave(&lock, flags);
 		gus_select_voice(voice);
 		gus_rampoff();
-		restore_flags(flags);
+		spin_unlock_irqrestore(&lock, flags);
 		return;
 		/*
 		 * Sustain phase begins. Continue envelope after receiving note off.
@@ -580,8 +535,7 @@
 	vol = voices[voice].initial_volume * voices[voice].env_offset[phase] / 255;
 	rate = voices[voice].env_rate[phase];
 
-	save_flags(flags);
-	cli();
+	spin_lock_irqsave(&lock, flags);
 	gus_select_voice(voice);
 
 	gus_voice_volume(prev_vol);
@@ -593,7 +547,7 @@
 
 	if (((vol - prev_vol) / 64) == 0)	/* No significant volume change */
 	{
-		restore_flags(flags);
+		spin_unlock_irqrestore(&lock, flags);
 		step_envelope(voice);		/* Continue the envelope on the next step */
 		return;
 	}
@@ -612,7 +566,7 @@
 		gus_rampon(0x60);	/* Decreasing volume, with IRQ */
 	}
 	voices[voice].current_volume = vol;
-	restore_flags(flags);
+	spin_unlock_irqrestore(&lock, flags);
 }
 
 static void init_envelope(int voice)
@@ -623,7 +577,7 @@
 	step_envelope(voice);
 }
 
-static void start_release(int voice, long int flags)
+static void start_release(int voice)
 {
 	if (gus_read8(0x00) & 0x03)
 		return;		/* Voice already stopped */
@@ -635,7 +589,6 @@
 
 	voices[voice].mode &= ~WAVE_SUSTAIN_ON;
 	gus_rampoff();
-	restore_flags(flags);
 	step_envelope(voice);
 }
 
@@ -644,23 +597,22 @@
 	int instr_no = sample_map[voice], is16bits;
 	long int flags;
 
-	save_flags(flags);
-	cli();
+	spin_lock_irqsave(&lock, flags);
 	gus_select_voice(voice);
 
 	if (instr_no < 0 || instr_no > MAX_SAMPLE)
 	{
 		gus_write8(0x00, 0x03);	/* Hard stop */
 		voice_alloc->map[voice] = 0;
-		restore_flags(flags);
+		spin_unlock_irqrestore(&lock, flags);
 		return;
 	}
 	is16bits = (samples[instr_no].mode & WAVE_16_BITS) ? 1 : 0;	/* 8 or 16 bits */
 
 	if (voices[voice].mode & WAVE_ENVELOPES)
 	{
-		start_release(voice, flags);
-		restore_flags(flags);
+		start_release(voice);
+		spin_unlock_irqrestore(&lock, flags);
 		return;
 	}
 	/*
@@ -671,14 +623,14 @@
 		gus_voice_off();
 		gus_rampoff();
 		gus_voice_init(voice);
-		restore_flags(flags);
+		spin_unlock_irqrestore(&lock, flags);
 		return;
 	}
 	gus_ramp_range(65, 4030);
 	gus_ramp_rate(2, 4);
 	gus_rampon(0x40 | 0x20);	/* Down, once, with IRQ */
 	voices[voice].volume_irq_mode = VMODE_HALT;
-	restore_flags(flags);
+	spin_unlock_irqrestore(&lock, flags);
 }
 
 static void gus_reset(void)
@@ -710,8 +662,7 @@
 		0, 1, 0, 2, 0, 3, 4, 5
 	};
 
-	save_flags(flags);
-	cli();
+	spin_lock_irqsave(&lock, flags);
 	gus_write8(0x4c, 0);	/* Reset GF1 */
 	gus_delay();
 	gus_delay();
@@ -850,7 +801,7 @@
 
 	if (iw_mode)
 		gus_write8(0x19, gus_read8(0x19) | 0x01);
-	restore_flags(flags);
+	spin_unlock_irqrestore(&lock, flags);
 }
 
 
@@ -1159,17 +1110,16 @@
 {
 	unsigned long flags;
 
-	save_flags(flags);
-	cli();
+	spin_lock_irqsave(&lock, flags);
 	/* voice_alloc->map[voice] = 0xffff; */
 	if (voices[voice].volume_irq_mode == VMODE_START_NOTE)
 	{
 		voices[voice].kill_pending = 1;
-		restore_flags(flags);
+		spin_unlock_irqrestore(&lock, flags);
 	}
 	else
 	{
-		restore_flags(flags);
+		spin_unlock_irqrestore(&lock, flags);
 		gus_voice_fade(voice);
 	}
 
@@ -1227,8 +1177,7 @@
 	compute_volume(voice, volume);
 	voices[voice].current_volume = voices[voice].initial_volume;
 
-	save_flags(flags);
-	cli();
+	spin_lock_irqsave(&lock, flags);
 	/*
 	 * CAUTION! Interrupts disabled. Enable them before returning
 	 */
@@ -1242,7 +1191,7 @@
 	{
 		gus_rampoff();
 		gus_voice_volume(target);
-		restore_flags(flags);
+		spin_unlock_irqrestore(&lock, flags);
 		return;
 	}
 	if (ramp_time == FAST_RAMP)
@@ -1255,7 +1204,7 @@
 	{
 		gus_rampoff();
 		gus_voice_volume(target);
-		restore_flags(flags);
+		spin_unlock_irqrestore(&lock, flags);
 		return;
 	}
 	if (target > curr)
@@ -1273,7 +1222,7 @@
 		gus_ramp_range(target, curr);
 		gus_rampon(0x40);	/* Ramp down, once, no irq */
 	}
-	restore_flags(flags);
+	spin_unlock_irqrestore(&lock, flags);
 }
 
 static void dynamic_volume_change(int voice)
@@ -1281,11 +1230,10 @@
 	unsigned char status;
 	unsigned long flags;
 
-	save_flags(flags);
-	cli();
+	spin_lock_irqsave(&lock, flags);
 	gus_select_voice(voice);
 	status = gus_read8(0x00);	/* Get voice status */
-	restore_flags(flags);
+	spin_unlock_irqrestore(&lock, flags);
 
 	if (status & 0x03)
 		return;		/* Voice was not running */
@@ -1300,11 +1248,10 @@
 	 * Voice is running and has envelopes.
 	 */
 
-	save_flags(flags);
-	cli();
+	spin_lock_irqsave(&lock, flags);
 	gus_select_voice(voice);
 	status = gus_read8(0x0d);	/* Ramping status */
-	restore_flags(flags);
+	spin_unlock_irqrestore(&lock, flags);
 
 	if (status & 0x03)	/* Sustain phase? */
 	{
@@ -1336,11 +1283,10 @@
 				freq = compute_finetune(voices[voice].orig_freq, value, voices[voice].bender_range, 0);
 				voices[voice].current_freq = freq;
 
-				save_flags(flags);
-				cli();
+				spin_lock_irqsave(&lock, flags);
 				gus_select_voice(voice);
 				gus_voice_freq(freq);
-				restore_flags(flags);
+				spin_unlock_irqrestore(&lock, flags);
 			}
 			break;
 
@@ -1497,17 +1443,12 @@
 			((sample_ptrs[sample] + samples[sample].len) / GUS_BANK_SIZE))
 				printk(KERN_ERR "GUS: Sample address error\n");
 	}
-	/*************************************************************************
-	 *    CAUTION!        Interrupts disabled. Don't return before enabling
-	 *************************************************************************/
-
-	save_flags(flags);
-	cli();
+	spin_lock_irqsave(&lock, flags);
 	gus_select_voice(voice);
 	gus_voice_off();
 	gus_rampoff();
 
-	restore_flags(flags);
+	spin_unlock_irqrestore(&lock, flags);
 
 	if (voices[voice].mode & WAVE_ENVELOPES)
 	{
@@ -1519,8 +1460,7 @@
 		compute_and_set_volume(voice, volume, 0);
 	}
 
-	save_flags(flags);
-	cli();
+	spin_lock_irqsave(&lock, flags);
 	gus_select_voice(voice);
 
 	if (samples[sample].mode & WAVE_LOOP_BACK)
@@ -1560,7 +1500,7 @@
 	gus_voice_freq(freq);
 	gus_voice_balance(pan);
 	gus_voice_on(mode);
-	restore_flags(flags);
+	spin_unlock_irqrestore(&lock, flags);
 
 	return 0;
 }
@@ -1577,8 +1517,7 @@
 	int mode;
 	int ret_val = 0;
 
-	save_flags(flags);
-	cli();
+	spin_lock_irqsave(&lock, flags);
 	if (note_num == 255)
 	{
 		if (voices[voice].volume_irq_mode == VMODE_START_NOTE)
@@ -1604,11 +1543,10 @@
 
 		if (voices[voice].sample_pending >= 0)
 		{
-			restore_flags(flags);	/* Run temporarily with interrupts enabled */
+			spin_unlock_irqrestore(&lock, flags);	/* Run temporarily with interrupts enabled */
 			guswave_set_instr(voices[voice].dev_pending, voice, voices[voice].sample_pending);
 			voices[voice].sample_pending = -1;
-			save_flags(flags);
-			cli();
+			spin_lock_irqsave(&lock, flags);
 			gus_select_voice(voice);	/* Reselect the voice (just to be sure) */
 		}
 		if ((mode & 0x01) || (int) ((gus_read16(0x09) >> 4) < (unsigned) 2065))
@@ -1628,7 +1566,7 @@
 			gus_rampon(0x20 | 0x40);	/* Ramp down, once, irq */
 		}
 	}
-	restore_flags(flags);
+	spin_unlock_irqrestore(&lock, flags);
 	return ret_val;
 }
 
@@ -1871,9 +1809,7 @@
 					   blk_sz))
 				return -EFAULT;
 
-			save_flags(flags);
-			cli();
-			/******** INTERRUPTS DISABLED NOW ********/
+			spin_lock_irqsave(&lock, flags);
 			gus_write8(0x41, 0);	/* Disable GF1 DMA */
 			DMAbuf_start_dma(gus_devnum, audio_devs[gus_devnum]->dmap_out->raw_buf_phys,
 				blk_sz, DMA_MODE_WRITE);
@@ -1924,16 +1860,15 @@
 			if (audio_devs[gus_devnum]->dmap_out->dma > 3)
 				dma_command |= 0x04;	/* 16 bit DMA _channel_ */
 			
-			gus_write8(0x41, dma_command);	/* Lets go luteet (=bugs) */
-
 			/*
 			 * Sleep here until the DRAM DMA done interrupt is served
 			 */
 			active_device = GUS_DEV_WAVE;
+			gus_write8(0x41, dma_command);	/* Lets go luteet (=bugs) */
 
+			spin_unlock_irqrestore(&lock, flags); /* opens a race */
 			if (!interruptible_sleep_on_timeout(&dram_sleeper, HZ))
 				printk("GUS: DMA Transfer timed out\n");
-			restore_flags(flags);
 		}
 
 		/*
@@ -1972,11 +1907,10 @@
 	switch (cmd)
 	{
 		case _GUS_NUMVOICES:
-			save_flags(flags);
-			cli();
+			spin_lock_irqsave(&lock, flags);
 			gus_select_voice(voice);
 			gus_select_max_voices(p1);
-			restore_flags(flags);
+			spin_unlock_irqrestore(&lock, flags);
 			break;
 
 		case _GUS_VOICESAMPLE:
@@ -1984,20 +1918,18 @@
 			break;
 
 		case _GUS_VOICEON:
-			save_flags(flags);
-			cli();
+			spin_lock_irqsave(&lock, flags);
 			gus_select_voice(voice);
 			p1 &= ~0x20;	/* Don't allow interrupts */
 			gus_voice_on(p1);
-			restore_flags(flags);
+			spin_unlock_irqrestore(&lock, flags);
 			break;
 
 		case _GUS_VOICEOFF:
-			save_flags(flags);
-			cli();
+			spin_lock_irqsave(&lock, flags);
 			gus_select_voice(voice);
 			gus_voice_off();
-			restore_flags(flags);
+			spin_unlock_irqrestore(&lock, flags);
 			break;
 
 		case _GUS_VOICEFADE:
@@ -2005,36 +1937,32 @@
 			break;
 
 		case _GUS_VOICEMODE:
-			save_flags(flags);
-			cli();
+			spin_lock_irqsave(&lock, flags);
 			gus_select_voice(voice);
 			p1 &= ~0x20;	/* Don't allow interrupts */
 			gus_voice_mode(p1);
-			restore_flags(flags);
+			spin_unlock_irqrestore(&lock, flags);
 			break;
 
 		case _GUS_VOICEBALA:
-			save_flags(flags);
-			cli();
+			spin_lock_irqsave(&lock, flags);
 			gus_select_voice(voice);
 			gus_voice_balance(p1);
-			restore_flags(flags);
+			spin_unlock_irqrestore(&lock, flags);
 			break;
 
 		case _GUS_VOICEFREQ:
-			save_flags(flags);
-			cli();
+			spin_lock_irqsave(&lock, flags);
 			gus_select_voice(voice);
 			gus_voice_freq(plong);
-			restore_flags(flags);
+			spin_unlock_irqrestore(&lock, flags);
 			break;
 
 		case _GUS_VOICEVOL:
-			save_flags(flags);
-			cli();
+			spin_lock_irqsave(&lock, flags);
 			gus_select_voice(voice);
 			gus_voice_volume(p1);
-			restore_flags(flags);
+			spin_unlock_irqrestore(&lock, flags);
 			break;
 
 		case _GUS_VOICEVOL2:	/* Just update the software voice level */
@@ -2044,53 +1972,48 @@
 		case _GUS_RAMPRANGE:
 			if (voices[voice].mode & WAVE_ENVELOPES)
 				break;	/* NO-NO */
-			save_flags(flags);
-			cli();
+			spin_lock_irqsave(&lock, flags);
 			gus_select_voice(voice);
 			gus_ramp_range(p1, p2);
-			restore_flags(flags);
+			spin_unlock_irqrestore(&lock, flags);
 			break;
 
 		case _GUS_RAMPRATE:
 			if (voices[voice].mode & WAVE_ENVELOPES)
 				break;	/* NJET-NJET */
-			save_flags(flags);
-			cli();
+			spin_lock_irqsave(&lock, flags);
 			gus_select_voice(voice);
 			gus_ramp_rate(p1, p2);
-			restore_flags(flags);
+			spin_unlock_irqrestore(&lock, flags);
 			break;
 
 		case _GUS_RAMPMODE:
 			if (voices[voice].mode & WAVE_ENVELOPES)
 				break;	/* NO-NO */
-			save_flags(flags);
-			cli();
+			spin_lock_irqsave(&lock, flags);
 			gus_select_voice(voice);
 			p1 &= ~0x20;	/* Don't allow interrupts */
 			gus_ramp_mode(p1);
-			restore_flags(flags);
+			spin_unlock_irqrestore(&lock, flags);
 			break;
 
 		case _GUS_RAMPON:
 			if (voices[voice].mode & WAVE_ENVELOPES)
 				break;	/* EI-EI */
-			save_flags(flags);
-			cli();
+			spin_lock_irqsave(&lock, flags);
 			gus_select_voice(voice);
 			p1 &= ~0x20;	/* Don't allow interrupts */
 			gus_rampon(p1);
-			restore_flags(flags);
+			spin_unlock_irqrestore(&lock, flags);
 			break;
 
 		case _GUS_RAMPOFF:
 			if (voices[voice].mode & WAVE_ENVELOPES)
 				break;	/* NEJ-NEJ */
-			save_flags(flags);
-			cli();
+			spin_lock_irqsave(&lock, flags);
 			gus_select_voice(voice);
 			gus_rampoff();
-			restore_flags(flags);
+			spin_unlock_irqrestore(&lock, flags);
 			break;
 
 		case _GUS_VOLUME_SCALE:
@@ -2099,11 +2022,10 @@
 			break;
 
 		case _GUS_VOICE_POS:
-			save_flags(flags);
-			cli();
+			spin_lock_irqsave(&lock, flags);
 			gus_select_voice(voice);
 			gus_set_voice_pos(voice, plong);
-			restore_flags(flags);
+			spin_unlock_irqrestore(&lock, flags);
 			break;
 
 		default:
@@ -2294,13 +2216,12 @@
 	if (pcm_active && pcm_opened)
 		for (voice = 0; voice < gus_audio_channels; voice++)
 		{
-			save_flags(flags);
-			cli();
+			spin_lock_irqsave(&lock, flags);
 			gus_select_voice(voice);
 			gus_rampoff();
 			gus_voice_volume(1530 + (25 * gus_pcm_volume));
 			gus_ramp_range(65, 1530 + (25 * gus_pcm_volume));
-			restore_flags(flags);
+			spin_unlock_irqrestore(&lock, flags);
 		}
 }
 
@@ -2348,8 +2269,7 @@
 			if (chn == 0)
 				ramp_mode[chn] = 0x04;	/* Enable rollover bit */
 		}
-		save_flags(flags);
-		cli();
+		spin_lock_irqsave(&lock, flags);
 		gus_select_voice(chn);
 		gus_voice_freq(speed);
 
@@ -2386,18 +2306,17 @@
 					 0, is16bits);	/* Loop end location */
 		else
 			mode[chn] |= 0x08;	/* Enable looping */
-		restore_flags(flags);
+		spin_unlock_irqrestore(&lock, flags);
 	}
 	for (chn = 0; chn < gus_audio_channels; chn++)
 	{
-		save_flags(flags);
-		cli();
+		spin_lock_irqsave(&lock, flags);
 		gus_select_voice(chn);
 		gus_write8(0x0d, ramp_mode[chn]);
 		if (iw_mode)
 			gus_write8(0x15, 0x00);	/* Reset voice deactivate bit of SMSI */
 		gus_voice_on(mode[chn]);
-		restore_flags(flags);
+		spin_unlock_irqrestore(&lock, flags);
 	}
 	pcm_active = 1;
 }
@@ -2419,8 +2338,7 @@
 	unsigned char dma_command;
 	unsigned long address, hold_address;
 
-	save_flags(flags);
-	cli();
+	spin_lock_irqsave(&lock, flags);
 
 	count = total_count / gus_audio_channels;
 
@@ -2485,7 +2403,7 @@
 		active_device = GUS_DEV_PCM_CONTINUE;
 	}
 
-	restore_flags(flags);
+	spin_unlock_irqrestore(&lock, flags);
 }
 
 static void gus_uninterleave8(char *buf, int l)
@@ -2547,8 +2465,7 @@
 	unsigned long flags;
 	unsigned char mode;
 
-	save_flags(flags);
-	cli();
+	spin_lock_irqsave(&lock, flags);
 
 	DMAbuf_start_dma(dev, buf, count, DMA_MODE_READ);
 	mode = 0xa0;		/* DMA IRQ enabled, invert MSB */
@@ -2560,7 +2477,7 @@
 	mode |= 0x01;		/* DMA enable */
 
 	gus_write8(0x49, mode);
-	restore_flags(flags);
+	spin_unlock_irqrestore(&lock, flags);
 }
 
 static int gus_audio_prepare_for_input(int dev, int bsize, int bcount)
@@ -2656,11 +2573,10 @@
 	freq = compute_finetune(voices[voice].orig_freq, value - 8192, voices[voice].bender_range, 0);
 	voices[voice].current_freq = freq;
 
-	save_flags(flags);
-	cli();
+	spin_lock_irqsave(&lock, flags);
 	gus_select_voice(voice);
 	gus_voice_freq(freq);
-	restore_flags(flags);
+	spin_unlock_irqrestore(&lock, flags);
 }
 
 static int guswave_alloc(int dev, int chn, int note, struct voice_alloc_info *alloc)
@@ -2741,8 +2657,7 @@
 	if (have_gus_max)	/* Don't disturb GUS MAX */
 		return;
 
-	save_flags(flags);
-	cli();
+	spin_lock_irqsave(&lock, flags);
 
 	/*
 	 *    Enable channels having vol > 10%
@@ -2768,7 +2683,7 @@
 	mix_image |= mask & 0x07;
 	outb((mix_image), u_Mixer);
 
-	restore_flags(flags);
+	spin_unlock_irqrestore(&lock, flags);
 }
 
 #define MIX_DEVS	(SOUND_MASK_MIC|SOUND_MASK_LINE| \
@@ -2977,11 +2892,10 @@
 	 *  Versions < 3.6 don't have the digital ASIC. Try to probe it first.
 	 */
 
-	save_flags(flags);
-	cli();
+	spin_lock_irqsave(&lock, flags);
 	outb((0x20), gus_base + 0x0f);
 	val = inb(gus_base + 0x0f);
-	restore_flags(flags);
+	spin_unlock_irqrestore(&lock, flags);
 
 	if (gus_pnp_flag || (val != 0xff && (val & 0x06)))	/* Should be 0x02?? */
 	{
@@ -3206,15 +3120,13 @@
 		vfree(samples);
 	samples=NULL;
 }
-
+/* called in interrupt context */
 static void do_loop_irq(int voice)
 {
 	unsigned char   tmp;
 	int             mode, parm;
-	unsigned long   flags;
 
-	save_flags(flags);
-	cli();
+	spin_lock(&lock);
 	gus_select_voice(voice);
 
 	tmp = gus_read8(0x00);
@@ -3290,7 +3202,7 @@
 		default:
 			break;
 	}
-	restore_flags(flags);
+	spin_unlock(&lock);
 }
 
 static void do_volume_irq(int voice)
@@ -3299,8 +3211,7 @@
 	int mode, parm;
 	unsigned long flags;
 
-	save_flags(flags);
-	cli();
+	spin_lock_irqsave(&lock, flags);
 
 	gus_select_voice(voice);
 	tmp = gus_read8(0x0d);
@@ -3318,18 +3229,18 @@
 		case VMODE_HALT:	/* Decay phase finished */
 			if (iw_mode)
 				gus_write8(0x15, 0x02);	/* Set voice deactivate bit of SMSI */
-			restore_flags(flags);
+			spin_unlock_irqrestore(&lock, flags);
 			gus_voice_init(voice);
 			break;
 
 		case VMODE_ENVELOPE:
 			gus_rampoff();
-			restore_flags(flags);
+			spin_unlock_irqrestore(&lock, flags);
 			step_envelope(voice);
 			break;
 
 		case VMODE_START_NOTE:
-			restore_flags(flags);
+			spin_unlock_irqrestore(&lock, flags);
 			guswave_start_note2(voices[voice].dev_pending, voice,
 				      voices[voice].note_pending, voices[voice].volume_pending);
 			if (voices[voice].kill_pending)
@@ -3345,11 +3256,10 @@
 			break;
 
 		default:
-			restore_flags(flags);
+			spin_unlock_irqrestore(&lock, flags);
 	}
-	restore_flags(flags);
 }
-
+/* called in irq context */
 void gus_voice_irq(void)
 {
 	unsigned long wave_ignore = 0, volume_ignore = 0;

-
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