ASoC: OMAP4 PCM - make sure self linked DMA is really stopped (fixme)

Make sure OMAP self linked DMA is really stopped.

FIXME: this needs a counter so we dont lock up.

Signed-off-by: Liam Girdwood <lrg@ti.com>

sound/soc/omap/omap-pcm.c

@@ -235,6 +235,11 @@ static int omap_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 		prtd->period_index = -1;
 		omap_stop_dma(prtd->dma_ch);
+		/* Since we are using self linking, there is a
+		   chance that the DMA as re-enabled the channel
+		   just after disabling it */
+		while (omap_get_dma_active_status(prtd->dma_ch))
+			omap_stop_dma(prtd->dma_ch);
 		break;
 	default:
 		ret = -EINVAL;