linux-kernel - [PATCH 3.13.y-ckt 023/121] regulator: max77693: Fix use of uninitialized regulator config

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Message-Id: <1417548000-1794-24-git-send-email-kamal@canonical.com>
Date:	Tue,  2 Dec 2014 11:18:22 -0800
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	Mark Brown <broonie@...nel.org>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.13.y-ckt 023/121] regulator: max77693: Fix use of uninitialized regulator config

3.13.11-ckt12 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Krzysztof Kozlowski <k.kozlowski@...sung.com>

commit ca0c37a0b489bb14bf3e1549e7a8d0c9a17f4919 upstream.

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.")
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 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 feb20bf..c2725e4 100644
--- a/drivers/regulator/max77693.c
+++ b/drivers/regulator/max77693.c
@@ -231,7 +231,7 @@ static int max77693_pmic_probe(struct platform_device *pdev)
 	struct max77693_pmic_dev *max77693_pmic;
 	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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