linux-kernel - [PATCH] bus: arm-integrator-lm: Add of_node

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Date:   Sat, 29 Aug 2020 23:11:54 +0530
From:   Sumera Priyadarsini <sylphrenadin@...il.com>
To:     linus.walleij@...aro.org
Cc:     Julia.Lawall@...6.fr, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] bus: arm-integrator-lm: 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 arm-integrator-lm.c by inserting
of_node_put() before a return statement.

Issue found with Coccinelle.

Signed-off-by: Sumera Priyadarsini <sylphrenadin@...il.com>
---
 drivers/bus/arm-integrator-lm.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/bus/arm-integrator-lm.c b/drivers/bus/arm-integrator-lm.c
index 845b6c43fef8..2344d560b144 100644
--- a/drivers/bus/arm-integrator-lm.c
+++ b/drivers/bus/arm-integrator-lm.c
@@ -54,6 +54,7 @@ static int integrator_lm_populate(int num, struct device *dev)
 			ret = of_platform_default_populate(child, NULL, dev);
 			if (ret) {
 				dev_err(dev, "failed to populate module\n");
+				of_node_put(child);
 				return ret;
 			}
 		}
-- 
2.17.1