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-rw-r--r--drivers/regulator/core.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index c70017d5f74b..daffff83ced2 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -140,7 +140,8 @@ static void regulator_lock_supply(struct regulator_dev *rdev)
{
int i;
- for (i = 0; rdev->supply; rdev = rdev->supply->rdev, i++)
+ mutex_lock(&rdev->mutex);
+ for (i = 1; rdev->supply; rdev = rdev->supply->rdev, i++)
mutex_lock_nested(&rdev->mutex, i);
}