linux-kernel - [PATCH] bus: qcom-ebi2: Add of_node

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Message-ID: <20200829174956.GA10245@Kaladin>
Date:   Sat, 29 Aug 2020 23:19:56 +0530
From:   Sumera Priyadarsini <sylphrenadin@...il.com>
To:     agross@...nel.org
Cc:     bjorn.andersson@...aro.org, Julia.Lawall@...6.fr,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] bus: qcom-ebi2: Add of_node_put() before return statement

Every iteration of for_each_available_child_of_node() decrements
the reference count of the previous node, however when control is
transferred from the middle of the loop, as in the case of a return
or break or goto, there is no decrement thus ultimately resulting in
a memory leak.

Fix a potential memory leak in qcom-ebi2.c by inserting
of_node_put() before a return statement.

Issue found with Coccinelle.

Signed-off-by: Sumera Priyadarsini <sylphrenadin@...il.com>
---
 drivers/bus/qcom-ebi2.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/bus/qcom-ebi2.c b/drivers/bus/qcom-ebi2.c
index 03ddcf426887..0b8f53a688b8 100644
--- a/drivers/bus/qcom-ebi2.c
+++ b/drivers/bus/qcom-ebi2.c
@@ -353,8 +353,10 @@ static int qcom_ebi2_probe(struct platform_device *pdev)
 
 		/* Figure out the chipselect */
 		ret = of_property_read_u32(child, "reg", &csindex);
-		if (ret)
+		if (ret) {
+			of_node_put(child);
 			return ret;
+		}
 
 		if (csindex > 5) {
 			dev_err(dev,
-- 
2.17.1