regulator: Check for constraints before using them for name

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index e38db55600e0..6e0c723371d8 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -232,7 +232,7 @@ static ssize_t regulator_name_show(struct device *dev,
         struct regulator_dev *rdev = dev_get_drvdata(dev);
         const char *name;
 
-        if (rdev->constraints->name)
+        if (rdev->constraints && rdev->constraints->name)
                 name = rdev->constraints->name;
         else if (rdev->desc->name)
                 name = rdev->desc->name;