[PATCH 3.18 38/68] regulator: core: Fix regualtor_ena_gpio_free not to access pin after freeing

[Greg Kroah-Hartman]

3.18-stable review patch.  If anyone has any objections, please let me know.

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

From: Seung-Woo Kim <sw0312....@samsung.com>

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....@samsung.com>
Signed-off-by: Mark Brown <broo...@kernel.org>
Signed-off-by: Amit Pundir <amit.pun...@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 drivers/regulator/core.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1720,6 +1720,8 @@ static void regulator_ena_gpio_free(stru
                                gpiod_put(pin->gpiod);
                                list_del(&pin->list);
                                kfree(pin);
+                               rdev->ena_pin = NULL;
+                               return;
                        } else {
                                pin->request_count--;
                        }