linux-kernel - [PATCH] regulator: core: fix rdev->regmap NULL pointer

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Date:	Fri, 7 Sep 2012 20:45:05 +0530
From:	AnilKumar Ch <anilkumar@...com>
To:	<broonie@...nsource.wolfsonmicro.com>,
	<linux-kernel@...r.kernel.org>
CC:	<axel.lin@...il.com>, <lrg@...com>, AnilKumar Ch <anilkumar@...com>
Subject: [PATCH] regulator: core: fix rdev->regmap NULL pointer

Fixes rdev->regmap NULL pointer if regmap for regulator device
is NULL. If it is NULL then get regmap for regulator device
from its parent (MFD).

Signed-off-by: AnilKumar Ch <anilkumar@...com>
---
 drivers/regulator/core.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 4838531..7d85402 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -3189,8 +3189,10 @@ regulator_register(const struct regulator_desc *regulator_desc,
 	rdev->desc = regulator_desc;
 	if (config->regmap)
 		rdev->regmap = config->regmap;
-	else
+	else if (dev_get_regmap(dev, NULL))
 		rdev->regmap = dev_get_regmap(dev, NULL);
+	else if (dev->parent)
+		rdev->regmap = dev_get_regmap(dev->parent, NULL);
 	INIT_LIST_HEAD(&rdev->consumer_list);
 	INIT_LIST_HEAD(&rdev->list);
 	BLOCKING_INIT_NOTIFIER_HEAD(&rdev->notifier);
-- 
1.7.9.5

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