m68k: dmasound - Kill warn_unused_result warnings

warning: ignoring return value of 'request_irq', declared with attribute
warn_unused_result
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

sound/oss/dmasound/dmasound_atari.c

@@ -851,8 +851,9 @@ static int __init AtaIrqInit(void)
 	mfp.tim_dt_a = 1;	/* Cause interrupt after first event. */
 	mfp.tim_ct_a = 8;	/* Turn on event counting. */
 	/* Register interrupt handler. */
-	request_irq(IRQ_MFP_TIMA, AtaInterrupt, IRQ_TYPE_SLOW, "DMA sound",
-		    AtaInterrupt);
+	if (request_irq(IRQ_MFP_TIMA, AtaInterrupt, IRQ_TYPE_SLOW, "DMA sound",
+			AtaInterrupt))
+		return 0;
 	mfp.int_en_a |= 0x20;	/* Turn interrupt on. */
 	mfp.int_mk_a |= 0x20;
 	return 1;

sound/oss/dmasound/dmasound_q40.c

@@ -371,8 +371,9 @@ static void Q40Free(void *ptr, unsigned int size)
 static int __init Q40IrqInit(void)
 {
 	/* Register interrupt handler. */
-	request_irq(Q40_IRQ_SAMPLE, Q40StereoInterrupt, 0,
-		    "DMA sound", Q40Interrupt);
+	if (request_irq(Q40_IRQ_SAMPLE, Q40StereoInterrupt, 0,
+		    "DMA sound", Q40Interrupt))
+		return 0;
 
 	return(1);
 }
@@ -401,6 +402,7 @@ static void Q40PlayNextFrame(int index)
 	u_char *start;
 	u_long size;
 	u_char speed;
+	int error;
 
 	/* used by Q40Play() if all doubts whether there really is something
 	 * to be played are already wiped out.
@@ -419,11 +421,13 @@ static void Q40PlayNextFrame(int index)
 	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);
+		error = request_irq(Q40_IRQ_SAMPLE, Q40StereoInterrupt, 0,
+				    "Q40 sound", Q40Interrupt);
 	  else
-	        request_irq(Q40_IRQ_SAMPLE, Q40MonoInterrupt, 0,
-		    "Q40 sound", Q40Interrupt);
+		error = request_irq(Q40_IRQ_SAMPLE, Q40MonoInterrupt, 0,
+				    "Q40 sound", Q40Interrupt);
+	if (error && printk_ratelimit())
+		pr_err("Couldn't register sound interrupt\n");
 
 	master_outb( speed, SAMPLE_RATE_REG);
 	master_outb( 1,SAMPLE_CLEAR_REG);