linux-kernel - [PATCH] thermal: armada: fix incorrect check for drvdata allocation failure

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Message-Id: <20180730122716.6267-1-colin.king@canonical.com>
Date:   Mon, 30 Jul 2018 13:27:16 +0100
From:   Colin King <colin.king@...onical.com>
To:     Zhang Rui <rui.zhang@...el.com>,
        Eduardo Valentin <edubezval@...il.com>,
        linux-pm@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] thermal: armada: fix incorrect check for drvdata allocation failure

From: Colin Ian King <colin.king@...onical.com>

Currently the drvdata allocation failure is being incorrectly checked by
checking priv and not drvdata.  Fix this and also free priv to fix a
memory leak.

Detected by Coverity Scan, CID#1472102 ("Logically dead code")

Fixes: c9899c183921 ("thermal: armada: use the resource managed registration helper alternative")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/thermal/armada_thermal.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/thermal/armada_thermal.c b/drivers/thermal/armada_thermal.c
index 4164a5a4e480..b164fd9f21ac 100644
--- a/drivers/thermal/armada_thermal.c
+++ b/drivers/thermal/armada_thermal.c
@@ -611,8 +611,10 @@ static int armada_thermal_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL);
-	if (!priv)
+	if (!drvdata) {
+		devm_kfree(&pdev->dev, priv);
 		return -ENOMEM;
+	}
 
 	priv->dev = &pdev->dev;
 	priv->data = (struct armada_thermal_data *)match->data;
-- 
2.17.1