ASoC: imx-ssi: do not call hrtimer_disable in trigger function

Doing so causes a deadlock, so just signal the timer to stop
using an atomic variable.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/imx/imx-pcm-fiq.c

@@ -41,6 +41,7 @@ struct imx_pcm_runtime_data {
 	struct hrtimer hrt;
 	int poll_time_ns;
 	struct snd_pcm_substream *substream;
+	atomic_t running;
 };
 
 static enum hrtimer_restart snd_hrtimer_callback(struct hrtimer *hrt)
@@ -52,6 +53,9 @@ static enum hrtimer_restart snd_hrtimer_callback(struct hrtimer *hrt)
 	struct pt_regs regs;
 	unsigned long delta;
 
+	if (!atomic_read(&iprtd->running))
+		return HRTIMER_NORESTART;
+
 	get_fiq_regs(&regs);
 
 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
@@ -129,6 +133,7 @@ static int snd_imx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 	case SNDRV_PCM_TRIGGER_START:
 	case SNDRV_PCM_TRIGGER_RESUME:
 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		atomic_set(&iprtd->running, 1);
 		hrtimer_start(&iprtd->hrt, ns_to_ktime(iprtd->poll_time_ns),
 		      HRTIMER_MODE_REL);
 		if (++fiq_enable == 1)
@@ -139,11 +144,11 @@ static int snd_imx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 	case SNDRV_PCM_TRIGGER_STOP:
 	case SNDRV_PCM_TRIGGER_SUSPEND:
 	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
-		hrtimer_cancel(&iprtd->hrt);
+		atomic_set(&iprtd->running, 0);
+
 		if (--fiq_enable == 0)
 			disable_fiq(imx_pcm_fiq);
 
-
 		break;
 	default:
 		return -EINVAL;
@@ -190,6 +195,7 @@ static int snd_imx_open(struct snd_pcm_substream *substream)
 
 	iprtd->substream = substream;
 
+	atomic_set(&iprtd->running, 0);
 	hrtimer_init(&iprtd->hrt, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
 	iprtd->hrt.function = snd_hrtimer_callback;