[ALSA] emu10k1x - Minor clean up

Modules: EMU10K1/EMU10K2 driver

Minor clean up of the emu10k1x interrupt handler code.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

sound/pci/emu10k1/emu10k1x.c

@@ -795,9 +795,11 @@ static irqreturn_t snd_emu10k1x_interrupt(int irq, void *dev_id,
 
 	status = inl(chip->port + IPR);
 
-	if(status) {
+	if (! status)
+		return IRQ_NONE;
+
 	// capture interrupt
-		if(status & (IPR_CAP_0_LOOP | IPR_CAP_0_HALF_LOOP)) {
+	if (status & (IPR_CAP_0_LOOP | IPR_CAP_0_HALF_LOOP)) {
 		emu10k1x_voice_t *pvoice = &chip->capture_voice;
 		if(pvoice->use)
 			snd_emu10k1x_pcm_interrupt(chip, pvoice);
@@ -808,9 +810,9 @@ static irqreturn_t snd_emu10k1x_interrupt(int irq, void *dev_id,
 	}
 		
 	mask = IPR_CH_0_LOOP|IPR_CH_0_HALF_LOOP;
-		for(i = 0; i < 3; i++) {
-			if(status & mask) {
-				if(pvoice->use)
+	for (i = 0; i < 3; i++) {
+		if (status & mask) {
+			if (pvoice->use)
 				snd_emu10k1x_pcm_interrupt(chip, pvoice);
 			else 
 				snd_emu10k1x_intr_disable(chip, mask);
@@ -827,12 +829,9 @@ static irqreturn_t snd_emu10k1x_interrupt(int irq, void *dev_id,
 	}
 		
 	// acknowledge the interrupt if necessary
-		if(status)
-			outl(status, chip->port+IPR);
-
-//		snd_printk(KERN_INFO "interrupt %08x\n", status);
-	}
+	outl(status, chip->port + IPR);
 
+	// snd_printk(KERN_INFO "interrupt %08x\n", status);
 	return IRQ_HANDLED;
 }