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leds: gpio: fix an unhandled error case in create_gpio_led

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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 <[email protected]>
Signed-off-by: Jacek Anaszewski <[email protected]>
This commit is contained in:
Heiner Kallweit 2016-09-14 20:54:31 +02:00 • committed by Jacek Anaszewski
commit 061b5c1d01
1 changed files with 6 additions and 3 deletions
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9
drivers/leds/leds-gpio.c
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@ -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;