[PATCH 3.16 4/7] regulator: core: Fix regualtor_ena_gpio_free not to access pin after freeing

[Ben Hutchings]

3.16.45-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Seung-Woo Kim <sw0312.kim@xxxxxxxxxxx>

commit 60a2362f769cf549dc466134efe71c8bf9fbaaba upstream.

After freeing pin from regulator_ena_gpio_free, loop can access
the pin. So this patch fixes not to access pin after freeing.

Signed-off-by: Seung-Woo Kim <sw0312.kim@xxxxxxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
 drivers/regulator/core.c | 2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1709,6 +1709,8 @@ static void regulator_ena_gpio_free(stru
 				gpio_free(pin->gpio);
 				list_del(&pin->list);
 				kfree(pin);
+				rdev->ena_pin = NULL;
+				return;
 			} else {
 				pin->request_count--;
 			}