[PATCH 4/4] ASoC: qdsp6: q6apm-dai: only stop graphs that are started

[Srinivas Kandagatla <srinivas.kandagatla@linaro.org>]

Its possible that the sound card is just opened and closed without actually
playing stream, ex: if the audio file itself is missing.

Even in such cases we do call stop on graphs that are not yet started.
DSP can throw errors in such cases, so add a check to see if the graph
was started before stopping it.

Fixes: 9b4fe0f1cd79 ("ASoC: qdsp6: audioreach: add q6apm-dai support")
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
---
 sound/soc/qcom/qdsp6/q6apm-dai.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/sound/soc/qcom/qdsp6/q6apm-dai.c b/sound/soc/qcom/qdsp6/q6apm-dai.c
index eb1c3aec479b..19c4a90ec1ea 100644
--- a/sound/soc/qcom/qdsp6/q6apm-dai.c
+++ b/sound/soc/qcom/qdsp6/q6apm-dai.c
@@ -308,8 +308,11 @@ static int q6apm_dai_close(struct snd_soc_component *component,
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct q6apm_dai_rtd *prtd = runtime->private_data;
 
-	q6apm_graph_stop(prtd->graph);
-	q6apm_unmap_memory_regions(prtd->graph, substream->stream);
+	if (prtd->state) { /* only stop graph that is started */
+		q6apm_graph_stop(prtd->graph);
+		q6apm_unmap_memory_regions(prtd->graph, substream->stream);
+	}
+
 	q6apm_graph_close(prtd->graph);
 	prtd->graph = NULL;
 	kfree(prtd);
-- 
2.21.0