ASoC: qdsp6: q6routing: validate port id before setting up route

Validate port id before it starts sending commands to dsp this would
make error handling simpler.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20211116114721.12517-6-srinivas.kandagatla@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/qcom/qdsp6/q6routing.c

@@ -372,6 +372,12 @@ int q6routing_stream_open(int fedai_id, int perf_mode,
 	}
 
 	session = &routing_data->sessions[stream_id - 1];
+	if (session->port_id < 0) {
+		dev_err(routing_data->dev, "Routing not setup for MultiMedia%d Session\n",
+			session->fedai_id);
+		return -EINVAL;
+	}
+
 	pdata = &routing_data->port_data[session->port_id];
 
 	mutex_lock(&routing_data->lock);