regulator: core: Don't dereference config->dev before NULL checking for config

[Axel Lin <axel.lin@gmail.com>]

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Axel Lin <axel.lin@gmail.com>
---
 drivers/regulator/core.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 1bd71a8..bf46034 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -2853,7 +2853,7 @@ regulator_register(const struct regulator_desc *regulator_desc,
 	const struct regulator_init_data *init_data;
 	static atomic_t regulator_no = ATOMIC_INIT(0);
 	struct regulator_dev *rdev;
-	struct device *dev = config->dev;
+	struct device *dev;
 	int ret, i;
 	const char *supply = NULL;
 
@@ -2883,6 +2883,7 @@ regulator_register(const struct regulator_desc *regulator_desc,
 		return ERR_PTR(-EINVAL);
 	}
 
+	dev = config->dev;
 	init_data = config->init_data;
 
 	rdev = kzalloc(sizeof(struct regulator_dev), GFP_KERNEL);
-- 
1.7.5.4