linux-kernel - [PATCH] regulator: max77693: Fix use of uninitialized regulator config

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Date:	Mon, 03 Nov 2014 15:07:05 +0100
From:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
To:	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>, linux-kernel@...r.kernel.org
Cc:	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	stable@...r.kernel.org
Subject: [PATCH] regulator: max77693: Fix use of uninitialized regulator config

Driver allocated on stack struct regulator_config but didn't initialize
it fully. Few fields (driver_data, ena_gpio) were left untouched. This
lead to using random ena_gpio values as GPIOs for max77693 regulators.

On occasion these values could match real GPIO numbers leading to
interfering with other drivers and to unsuccessful enable/disable of
regulator.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>
Fixes: 80b022e29bfd ("regulator: max77693: Add max77693 regualtor driver.")
Cc: <stable@...r.kernel.org>
---
 drivers/regulator/max77693.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/regulator/max77693.c b/drivers/regulator/max77693.c
index 177dd9d2ce67..7b9755a6c3b5 100644
--- a/drivers/regulator/max77693.c
+++ b/drivers/regulator/max77693.c
@@ -227,7 +227,7 @@ static int max77693_pmic_probe(struct platform_device *pdev)
 	struct max77693_dev *iodev = dev_get_drvdata(pdev->dev.parent);
 	struct max77693_regulator_data *rdata = NULL;
 	int num_rdata, i;
-	struct regulator_config config;
+	struct regulator_config config = { };
 
 	num_rdata = max77693_pmic_init_rdata(&pdev->dev, &rdata);
 	if (!rdata || num_rdata <= 0) {
-- 
1.9.1

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