linux-kernel - [PATCH] pinctrl: nomadik: Fix refcount leak in nmk_pinctrl_dt_subnode_to

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Message-Id: <20220607111602.57355-1-linmq006@gmail.com>
Date:   Tue,  7 Jun 2022 15:16:01 +0400
From:   Miaoqian Lin <linmq006@...il.com>
To:     Linus Walleij <linus.walleij@...aro.org>,
        linux-arm-kernel@...ts.infradead.org, linux-gpio@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     linmq006@...il.com
Subject: [PATCH] pinctrl: nomadik: Fix refcount leak in nmk_pinctrl_dt_subnode_to_map

of_parse_phandle() returns a node pointer with refcount
incremented, we should use of_node_put() on it when not need anymore.
Add missing of_node_put() to avoid refcount leak."

Fixes: c2f6d059abfc ("pinctrl: nomadik: refactor DT parser to take two paths")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
---
 drivers/pinctrl/nomadik/pinctrl-nomadik.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/pinctrl/nomadik/pinctrl-nomadik.c b/drivers/pinctrl/nomadik/pinctrl-nomadik.c
index 640e50d94f27..f5014d09d81a 100644
--- a/drivers/pinctrl/nomadik/pinctrl-nomadik.c
+++ b/drivers/pinctrl/nomadik/pinctrl-nomadik.c
@@ -1421,8 +1421,10 @@ static int nmk_pinctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev,
 
 	has_config = nmk_pinctrl_dt_get_config(np, &configs);
 	np_config = of_parse_phandle(np, "ste,config", 0);
-	if (np_config)
+	if (np_config) {
 		has_config |= nmk_pinctrl_dt_get_config(np_config, &configs);
+		of_node_put(np_config);
+	}
 	if (has_config) {
 		const char *gpio_name;
 		const char *pin;
-- 
2.25.1