linux-kernel - [PATCH AUTOSEL 4.19 03/17] ASoC: qdsp6: q6routing: validate port id before setting up route

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Date:   Tue, 30 Nov 2021 09:52:27 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Mark Brown <broonie@...nel.org>,
        Sasha Levin <sashal@...nel.org>, bgoswami@...eaurora.org,
        lgirdwood@...il.com, perex@...ex.cz, tiwai@...e.com,
        stephan@...hold.net, ultracoolguy@...root.org,
        alsa-devel@...a-project.org
Subject: [PATCH AUTOSEL 4.19 03/17] ASoC: qdsp6: q6routing: validate port id before setting up route

From: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>

[ Upstream commit 6712c2e18c06b0976559fd4bd47774b243038e9c ]

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

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Link: https://lore.kernel.org/r/20211116114721.12517-6-srinivas.kandagatla@linaro.org
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 sound/soc/qcom/qdsp6/q6routing.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/sound/soc/qcom/qdsp6/q6routing.c b/sound/soc/qcom/qdsp6/q6routing.c
index 44eee18c658ae..a5bc7a60d119e 100644
--- a/sound/soc/qcom/qdsp6/q6routing.c
+++ b/sound/soc/qcom/qdsp6/q6routing.c
@@ -320,6 +320,12 @@ 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);
-- 
2.33.0