linux-kernel - [PATCH 3.18 38/68] regulator: core: Fix regualtor_ena_gpio

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Date:   Fri,  5 May 2017 11:32:23 -0700
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Seung-Woo Kim <sw0312.kim@...sung.com>,
        Mark Brown <broonie@...nel.org>,
        Amit Pundir <amit.pundir@...aro.org>
Subject: [PATCH 3.18 38/68] regulator: core: Fix regualtor_ena_gpio_free not to access pin after freeing

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

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

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