[PATCH v9 04/13] ASoC: qcom: q6apm-lpass-dai: Fix multiple graph opens

[Srinivas Kandagatla <srinivas.kandagatla@oss.qualcomm.com>]

As prepare can be called mulitple times, this can result in multiple
graph opens for playback path.

This will result in a memory leaks, fix this by adding a check before
opening.

Fixes: be1fae62cf25 ("ASoC: q6apm-lpass-dai: close graph on prepare errors")
Cc: Stable@vger.kernel.org
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@oss.qualcomm.com>
---
 sound/soc/qcom/qdsp6/q6apm-lpass-dais.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/qcom/qdsp6/q6apm-lpass-dais.c b/sound/soc/qcom/qdsp6/q6apm-lpass-dais.c
index 5be37eeea329..ba64117b8cfe 100644
--- a/sound/soc/qcom/qdsp6/q6apm-lpass-dais.c
+++ b/sound/soc/qcom/qdsp6/q6apm-lpass-dais.c
@@ -181,7 +181,7 @@ static int q6apm_lpass_dai_prepare(struct snd_pcm_substream *substream, struct s
 	 * It is recommend to load DSP with source graph first and then sink
 	 * graph, so sequence for playback and capture will be different
 	 */
-	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && dai_data->graph[dai->id] == NULL) {
 		graph = q6apm_graph_open(dai->dev, NULL, dai->dev, graph_id);
 		if (IS_ERR(graph)) {
 			dev_err(dai->dev, "Failed to open graph (%d)\n", graph_id);
-- 
2.47.3