From 5b818fd18c7b81bb41c8a18943e562407ac95952 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Mon, 21 Dec 2015 11:34:11 +0100 Subject: [PATCH] gpio: pch: Be sure to clamp return value As we want gpio_chip .get() calls to be able to return negative error codes and propagate to drivers, we need to go over all drivers and make sure their return values are clamped to [0,1]. We do this by using the ret = !!(val) design pattern. Cc: Thierry Reding Cc: Daniel Krueger Cc: Jean Delvare Signed-off-by: Linus Walleij --- drivers/gpio/gpio-pch.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpio/gpio-pch.c b/drivers/gpio/gpio-pch.c index af0715f8524b..8c45b74dcf21 100644 --- a/drivers/gpio/gpio-pch.c +++ b/drivers/gpio/gpio-pch.c @@ -127,7 +127,7 @@ static int pch_gpio_get(struct gpio_chip *gpio, unsigned nr) { struct pch_gpio *chip = container_of(gpio, struct pch_gpio, gpio); - return ioread32(&chip->reg->pi) & (1 << nr); + return !!(ioread32(&chip->reg->pi) & (1 << nr)); } static int pch_gpio_direction_output(struct gpio_chip *gpio, unsigned nr, -- 2.39.5