From: Seung-Woo Kim <sw0312.kim@samsung.com>
Date: Thu, 4 Dec 2014 10:17:17 +0000 (+0900)
Subject: regulator: core: Fix regualtor_ena_gpio_free not to access pin after freeing
X-Git-Tag: firefly_0821_release~176^2~2777^2~4^2
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=60a2362f769cf549dc466134efe71c8bf9fbaaba;p=firefly-linux-kernel-4.4.55.git

regulator: core: Fix regualtor_ena_gpio_free not to access pin after freeing

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@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index df2af3a11351..47a455cfe04f 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1713,6 +1713,8 @@ static void regulator_ena_gpio_free(struct regulator_dev *rdev)
 				gpiod_put(pin->gpiod);
 				list_del(&pin->list);
 				kfree(pin);
+				rdev->ena_pin = NULL;
+				return;
 			} else {
 				pin->request_count--;
 			}