linux-kernel - [PATCH] regulator: core: Add of_node

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Date:   Sun,  4 Aug 2019 21:50:23 +0530
From:   Nishka Dasgupta <nishkadg.linux@...il.com>
To:     lgirdwood@...il.com, broonie@...nel.org,
        linux-kernel@...r.kernel.org
Cc:     Nishka Dasgupta <nishkadg.linux@...il.com>
Subject: [PATCH] regulator: core: Add of_node_put() before return

Each iteration of for_each_child_of_node puts the previous node, but in
the case of a return from the middle of the loop, there is no put, thus
causing a memory leak. Hence add an of_node_put before the return in
two places.
Issue found with Coccinelle.

Signed-off-by: Nishka Dasgupta <nishkadg.linux@...il.com>
---
 drivers/regulator/core.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index e0c0cf462004..7a5d52948703 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -380,9 +380,12 @@ static struct device_node *of_get_child_regulator(struct device_node *parent,
 
 		if (!regnode) {
 			regnode = of_get_child_regulator(child, prop_name);
-			if (regnode)
+			if (regnode) {
+				of_node_put(child);
 				return regnode;
+			}
 		} else {
+			of_node_put(child);
 			return regnode;
 		}
 	}
-- 
2.19.1