linux-kernel - [PATCH 4.19 117/276] pinctrl: samsung: fix leaked of

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Date:   Wed, 29 May 2019 20:04:35 -0700
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Wen Yang <wen.yang99@....com.cn>,
        Linus Walleij <linus.walleij@...aro.org>,
        Tomasz Figa <tomasz.figa@...il.com>,
        Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Kukjin Kim <kgene@...nel.org>,
        linux-samsung-soc@...r.kernel.org, linux-gpio@...r.kernel.org,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 117/276] pinctrl: samsung: fix leaked of_node references

[ Upstream commit 44b9f86cd41db6c522effa5aec251d664a52fbc0 ]

The call to of_find_compatible_node returns a node pointer with refcount
incremented thus it must be explicitly decremented after the last
usage.

Detected by coccinelle with the following warnings:
./drivers/pinctrl/samsung/pinctrl-exynos-arm.c:76:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 66, but without a corresponding object release within this function.
./drivers/pinctrl/samsung/pinctrl-exynos-arm.c:82:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 66, but without a corresponding object release within this function.

Signed-off-by: Wen Yang <wen.yang99@....com.cn>
Cc: Linus Walleij <linus.walleij@...aro.org>
Cc: Tomasz Figa <tomasz.figa@...il.com>
Cc: Sylwester Nawrocki <s.nawrocki@...sung.com>
Cc: Kukjin Kim <kgene@...nel.org>
Cc: linux-samsung-soc@...r.kernel.org
Cc: linux-gpio@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Reviewed-by: Krzysztof Kozlowski <krzk@...nel.org>
Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/pinctrl/samsung/pinctrl-exynos-arm.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/pinctrl/samsung/pinctrl-exynos-arm.c b/drivers/pinctrl/samsung/pinctrl-exynos-arm.c
index 44c6b753f692a..85ddf49a51885 100644
--- a/drivers/pinctrl/samsung/pinctrl-exynos-arm.c
+++ b/drivers/pinctrl/samsung/pinctrl-exynos-arm.c
@@ -71,6 +71,7 @@ s5pv210_retention_init(struct samsung_pinctrl_drv_data *drvdata,
 	}
 
 	clk_base = of_iomap(np, 0);
+	of_node_put(np);
 	if (!clk_base) {
 		pr_err("%s: failed to map clock registers\n", __func__);
 		return ERR_PTR(-EINVAL);
-- 
2.20.1