[ARM] Fix Acorn VIDC sound driver.

Update the Acorn VIDC sound interrupt handler to return IRQ_HANDLED.

sound/oss/vidc.c

@@ -324,9 +324,10 @@ static int vidc_audio_prepare_for_input(int dev, int bsize, int bcount)
 	return -EINVAL;
 }
 
-static void vidc_audio_dma_interrupt(void)
+static irqreturn_t vidc_audio_dma_interrupt(void)
 {
 	DMAbuf_outputintr(vidc_adev, 1);
+	return IRQ_HANDLED;
 }
 
 /*

sound/oss/vidc.h

@@ -50,7 +50,7 @@ extern unsigned long (*vidc_filler) (unsigned long ibuf, unsigned long iend,
  * Virtual DMA buffer exhausted
  */
 
-extern void     (*dma_interrupt) (void);
+extern irqreturn_t (*dma_interrupt) (void);
 
 /*
  * Virtual DMA buffer addresses

sound/oss/vidc_fill.S

@@ -133,10 +133,6 @@ ENTRY(vidc_clear)
  *  ip = corrupted
  */
 
-%%%%%%%%%%%%%%%%%%%
-fixme!  This funtion needs to return IRQ_HANDLED
-%%%%%%%%%%%%%%%%%%%
-
 ENTRY(vidc_sound_dma_irq)
 		stmfd	sp!, {r4 - r8, lr}
 		ldr	r8, =dma_start
@@ -189,6 +185,7 @@ ENTRY(vidc_sound_dma_irq)
 		mov	r0, #0x10
 		strneb	r0, [ip, #IOMD_SD0CR]
 		ldmfd	sp!, {r4 - r8, lr}
+		mov	r0, #1				@ IRQ_HANDLED
 		teq	r1, #0				@ If we have no more
 		movne	pc, lr
 		teq	r3, #0