regulator: Fix memory leak in set_machine_constraints() error paths

Properly kfree rdev->constraints in all set_machine_constraints() error paths.
Also properly kfree rdev->constraints in regulator_register() error paths.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 3700d0953d7..a0195445675 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -794,7 +794,6 @@ static int machine_constraints_voltage(struct regulator_dev *rdev,
                 if (ret < 0) {
                         rdev_err(rdev, "failed to apply %duV constraint\n",
                                  rdev->constraints->min_uV);
-                        rdev->constraints = NULL;
                         return ret;
                 }
         }
@@ -897,7 +896,6 @@ static int set_machine_constraints(struct regulator_dev *rdev,
                 ret = suspend_prepare(rdev, rdev->constraints->initial_state);
                 if (ret < 0) {
                         rdev_err(rdev, "failed to set suspend state\n");
-                        rdev->constraints = NULL;
                         goto out;
                 }
         }
@@ -924,13 +922,15 @@ static int set_machine_constraints(struct regulator_dev *rdev,
                 ret = ops->enable(rdev);
                 if (ret < 0) {
                         rdev_err(rdev, "failed to enable\n");
-                        rdev->constraints = NULL;
                         goto out;
                 }
         }
 
         print_constraints(rdev);
+        return 0;
 out:
+        kfree(rdev->constraints);
+        rdev->constraints = NULL;
         return ret;
 }
 
@@ -2701,6 +2701,7 @@ unset_supplies:
         unset_regulator_supplies(rdev);
 
 scrub:
+        kfree(rdev->constraints);
         device_unregister(&rdev->dev);
         /* device core frees rdev */
         rdev = ERR_PTR(ret);