linux-kernel - [PATCH AUTOSEL 6.1 09/26] soundwire: qcom: add proper error paths in qcom_swrm

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Message-Id: <20230616102625.673454-9-sashal@kernel.org>
Date:   Fri, 16 Jun 2023 06:26:06 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Vinod Koul <vkoul@...nel.org>, Sasha Levin <sashal@...nel.org>,
        agross@...nel.org, andersson@...nel.org,
        yung-chuan.liao@...ux.intel.com, linux-arm-msm@...r.kernel.org,
        alsa-devel@...a-project.org
Subject: [PATCH AUTOSEL 6.1 09/26] soundwire: qcom: add proper error paths in qcom_swrm_startup()

From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>

[ Upstream commit 99e09b9c0ab43346c52f2787ca4e5c4b1798362e ]

Reverse actions in qcom_swrm_startup() error paths to avoid leaking
stream memory and keeping runtime PM unbalanced.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Link: https://lore.kernel.org/r/20230517163736.997553-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Vinod Koul <vkoul@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/soundwire/qcom.c | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c
index 21c50972047f5..b2eb3090f4b46 100644
--- a/drivers/soundwire/qcom.c
+++ b/drivers/soundwire/qcom.c
@@ -1090,8 +1090,10 @@ static int qcom_swrm_startup(struct snd_pcm_substream *substream,
 	}
 
 	sruntime = sdw_alloc_stream(dai->name);
-	if (!sruntime)
-		return -ENOMEM;
+	if (!sruntime) {
+		ret = -ENOMEM;
+		goto err_alloc;
+	}
 
 	ctrl->sruntime[dai->id] = sruntime;
 
@@ -1101,12 +1103,19 @@ static int qcom_swrm_startup(struct snd_pcm_substream *substream,
 		if (ret < 0 && ret != -ENOTSUPP) {
 			dev_err(dai->dev, "Failed to set sdw stream on %s\n",
 				codec_dai->name);
-			sdw_release_stream(sruntime);
-			return ret;
+			goto err_set_stream;
 		}
 	}
 
 	return 0;
+
+err_set_stream:
+	sdw_release_stream(sruntime);
+err_alloc:
+	pm_runtime_mark_last_busy(ctrl->dev);
+	pm_runtime_put_autosuspend(ctrl->dev);
+
+	return ret;
 }
 
 static void qcom_swrm_shutdown(struct snd_pcm_substream *substream,
-- 
2.39.2