[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....@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: Ben Hutchings <b...@decadent.org.uk>
---
 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--;
                        }