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    Subject[PATCH 3.18 38/68] regulator: core: Fix regualtor_ena_gpio_free not to access pin after freeing
    Date
    3.18-stable review patch.  If anyone has any objections, please let me know.

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

    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--;
    }

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