linux-kernel - [PATCH AUTOSEL 4.19 016/244] pinctrl: zte: fix leaked of

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Message-Id: <20190522192630.24917-16-sashal@kernel.org>
Date:   Wed, 22 May 2019 15:22:42 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Wen Yang <wen.yang99@....com.cn>,
        Linus Walleij <linus.walleij@...aro.org>,
        Jun Nie <jun.nie@...aro.org>, linux-gpio@...r.kernel.org,
        Shawn Guo <shawnguo@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH AUTOSEL 4.19 016/244] pinctrl: zte: fix leaked of_node references

From: Wen Yang <wen.yang99@....com.cn>

[ Upstream commit 02d15f0d80720545f1f4922a1550ea4aaad4e152 ]

The call to of_parse_phandle 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/zte/pinctrl-zx.c:415:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 407, but without a corresponding object release within this function.
./drivers/pinctrl/zte/pinctrl-zx.c:422:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 407, but without a corresponding object release within this function.
./drivers/pinctrl/zte/pinctrl-zx.c:436:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 407, but without a corresponding object release within this function.
./drivers/pinctrl/zte/pinctrl-zx.c:444:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 407, but without a corresponding object release within this function.
./drivers/pinctrl/zte/pinctrl-zx.c:448:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 407, 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: Jun Nie <jun.nie@...aro.org>
Cc: Linus Walleij <linus.walleij@...aro.org>
Cc: linux-gpio@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Acked-by: Shawn Guo <shawnguo@...nel.org>
Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/pinctrl/zte/pinctrl-zx.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/pinctrl/zte/pinctrl-zx.c b/drivers/pinctrl/zte/pinctrl-zx.c
index caa44dd2880a8..3cb69309912ba 100644
--- a/drivers/pinctrl/zte/pinctrl-zx.c
+++ b/drivers/pinctrl/zte/pinctrl-zx.c
@@ -411,6 +411,7 @@ int zx_pinctrl_init(struct platform_device *pdev,
 	}

 	zpctl->aux_base = of_iomap(np, 0);
+	of_node_put(np);
 	if (!zpctl->aux_base)
 		return -ENOMEM;

-- 
2.20.1