From mboxrd@z Thu Jan 1 00:00:00 1970 From: Heiner Kallweit Subject: [PATCH 1/6] leds: gpio: fix an unhandled error case in create_gpio_led Date: Tue, 13 Sep 2016 20:53:00 +0200 Message-ID: <15945af0-24df-ff7c-73b7-7872dc5ed8bd@gmail.com> References: <5432fb03-ea18-a949-ce53-10fedc15f5d9@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <5432fb03-ea18-a949-ce53-10fedc15f5d9@gmail.com> Sender: linux-kernel-owner@vger.kernel.org To: Jacek Anaszewski Cc: "linux-leds@vger.kernel.org" , Linux Kernel Mailing List List-Id: linux-leds@vger.kernel.org gpiod_get_value_cansleep returns 0, 1, or an error code. So far errors are not handled and treated the same as 1. Change this to bail out if an error code is returned and remove the double negation. Signed-off-by: Heiner Kallweit --- drivers/leds/leds-gpio.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/leds/leds-gpio.c b/drivers/leds/leds-gpio.c index 3599b2e..10c851e 100644 --- a/drivers/leds/leds-gpio.c +++ b/drivers/leds/leds-gpio.c @@ -118,10 +118,13 @@ static int create_gpio_led(const struct gpio_led *template, led_dat->platform_gpio_blink_set = blink_set; led_dat->cdev.blink_set = gpio_blink_set; } - if (template->default_state == LEDS_GPIO_DEFSTATE_KEEP) - state = !!gpiod_get_value_cansleep(led_dat->gpiod); - else + if (template->default_state == LEDS_GPIO_DEFSTATE_KEEP) { + state = gpiod_get_value_cansleep(led_dat->gpiod); + if (state < 0) + return state; + } else { state = (template->default_state == LEDS_GPIO_DEFSTATE_ON); + } led_dat->cdev.brightness = state ? LED_FULL : LED_OFF; if (!template->retain_state_suspended) led_dat->cdev.flags |= LED_CORE_SUSPENDRESUME; -- 2.9.2