diff --git a/sound/sh/aica.c b/sound/sh/aica.c
index 2b26311405a422206e869ce186bd17255a847d0a..8274da2d6b20dd2afdf500148e3ff6f104d7cd24 100644
--- a/sound/sh/aica.c
+++ b/sound/sh/aica.c
@@ -295,7 +295,8 @@ static void run_spu_dma(struct work_struct *work)
 		dreamcastcard->clicks++;
 		if (unlikely(dreamcastcard->clicks >= AICA_PERIOD_NUMBER))
 			dreamcastcard->clicks %= AICA_PERIOD_NUMBER;
-		mod_timer(&dreamcastcard->timer, jiffies + 1);
+		if (snd_pcm_running(dreamcastcard->substream))
+			mod_timer(&dreamcastcard->timer, jiffies + 1);
 	}
 }
 
@@ -303,10 +304,12 @@ static void aica_period_elapsed(struct timer_list *t)
 {
 	struct snd_card_aica *dreamcastcard = from_timer(dreamcastcard,
 							      t, timer);
-	struct snd_pcm_substream *substream = dreamcastcard->timer_substream;
+	struct snd_pcm_substream *substream = dreamcastcard->substream;
 	/*timer function - so cannot sleep */
 	int play_period;
 	struct snd_pcm_runtime *runtime;
+	if (!snd_pcm_running(substream))
+		return;
 	runtime = substream->runtime;
 	dreamcastcard = substream->pcm->private_data;
 	/* Have we played out an additional period? */
@@ -335,13 +338,6 @@ static void spu_begin_dma(struct snd_pcm_substream *substream)
 	dreamcastcard = substream->pcm->private_data;
 	/*get the queue to do the work */
 	schedule_work(&(dreamcastcard->spu_dma_work));
-	/* Timer may already be running */
-	if (unlikely(dreamcastcard->timer_substream)) {
-		mod_timer(&dreamcastcard->timer, jiffies + 4);
-		return;
-	}
-	timer_setup(&dreamcastcard->timer, aica_period_elapsed, 0);
-	dreamcastcard->timer_substream = substream;
 	mod_timer(&dreamcastcard->timer, jiffies + 4);
 }
 
@@ -374,13 +370,20 @@ static int snd_aicapcm_pcm_open(struct snd_pcm_substream
 	return 0;
 }
 
+static int snd_aicapcm_pcm_sync_stop(struct snd_pcm_substream *substream)
+{
+	struct snd_card_aica *dreamcastcard = substream->pcm->private_data;
+
+	del_timer_sync(&dreamcastcard->timer);
+	cancel_work_sync(&dreamcastcard->spu_dma_work);
+	return 0;
+}
+
 static int snd_aicapcm_pcm_close(struct snd_pcm_substream
 				 *substream)
 {
 	struct snd_card_aica *dreamcastcard = substream->pcm->private_data;
-	flush_work(&(dreamcastcard->spu_dma_work));
-	if (dreamcastcard->timer_substream)
-		del_timer(&dreamcastcard->timer);
+	dreamcastcard->substream = NULL;
 	kfree(dreamcastcard->channel);
 	spu_disable();
 	return 0;
@@ -445,6 +448,7 @@ static const struct snd_pcm_ops snd_aicapcm_playback_ops = {
 	.prepare = snd_aicapcm_pcm_prepare,
 	.trigger = snd_aicapcm_pcm_trigger,
 	.pointer = snd_aicapcm_pcm_pointer,
+	.sync_stop = snd_aicapcm_pcm_sync_stop,
 };
 
 /* TO DO: set up to handle more than one pcm instance */
@@ -615,6 +619,7 @@ static int snd_aica_probe(struct platform_device *devptr)
 	       "Yamaha AICA Super Intelligent Sound Processor for SEGA Dreamcast");
 	/* Prepare to use the queue */
 	INIT_WORK(&(dreamcastcard->spu_dma_work), run_spu_dma);
+	timer_setup(&dreamcastcard->timer, aica_period_elapsed, 0);
 	/* Load the PCM 'chip' */
 	err = snd_aicapcmchip(dreamcastcard, 0);
 	if (unlikely(err < 0))