linux-kernel - [PATCH 4.9 057/134] regulator: axp20x: Fix reference cout leak

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Message-Id: <20210301161016.361981677@linuxfoundation.org>
Date:   Mon,  1 Mar 2021 17:12:38 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Pan Bian <bianpan2016@....com>,
        Mark Brown <broonie@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.9 057/134] regulator: axp20x: Fix reference cout leak

From: Pan Bian <bianpan2016@....com>

[ Upstream commit e78bf6be7edaacb39778f3a89416caddfc6c6d70 ]

Decrements the reference count of device node and its child node.

Fixes: dfe7a1b058bb ("regulator: AXP20x: Add support for regulators subsystem")
Signed-off-by: Pan Bian <bianpan2016@....com>
Link: https://lore.kernel.org/r/20210120123313.107640-1-bianpan2016@163.com
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/regulator/axp20x-regulator.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/regulator/axp20x-regulator.c b/drivers/regulator/axp20x-regulator.c
index a3ade9e4ef478..86776d45b68e1 100644
--- a/drivers/regulator/axp20x-regulator.c
+++ b/drivers/regulator/axp20x-regulator.c
@@ -415,7 +415,7 @@ static int axp20x_set_dcdc_freq(struct platform_device *pdev, u32 dcdcfreq)
 static int axp20x_regulator_parse_dt(struct platform_device *pdev)
 {
 	struct device_node *np, *regulators;
-	int ret;
+	int ret = 0;
 	u32 dcdcfreq = 0;
 
 	np = of_node_get(pdev->dev.parent->of_node);
@@ -430,13 +430,12 @@ static int axp20x_regulator_parse_dt(struct platform_device *pdev)
 		ret = axp20x_set_dcdc_freq(pdev, dcdcfreq);
 		if (ret < 0) {
 			dev_err(&pdev->dev, "Error setting dcdc frequency: %d\n", ret);
-			return ret;
 		}
-
 		of_node_put(regulators);
 	}
 
-	return 0;
+	of_node_put(np);
+	return ret;
 }
 
 static int axp20x_set_dcdc_workmode(struct regulator_dev *rdev, int id, u32 workmode)
-- 
2.27.0