linux-kernel - [PATCH] regulator: core: Fix regualtor_ena_gpio

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Date:	Thu, 04 Dec 2014 19:17:17 +0900
From:	Seung-Woo Kim <sw0312.kim@...sung.com>
To:	lgirdwood@...il.com, broonie@...nel.org,
	linux-kernel@...r.kernel.org
Cc:	sw0312.kim@...sung.com
Subject: [PATCH] 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@...sung.com>
---
 drivers/regulator/core.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index cd87c0c..479ef0b 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--;
 			}
-- 
1.7.4.1

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