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

Greg Kroah-Hartman
2017-05-05T18:39:37Z

From: Seung-Woo Kim <sw0312.kim@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.kim@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@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--;
}