From 249e573d99ab590e19bd23f084f8c6540daa7b06 Mon Sep 17 00:00:00 2001 From: Linus Walleij <linus.walleij@linaro.org> Date: Tue, 22 Dec 2015 15:40:27 +0100 Subject: [PATCH] MIPS: ar7: 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. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Florian Fainelli <f.fainelli@gmail.com> Cc: Alban Bedel <albeu@free.fr> Cc: linux-mips@linux-mips.org Cc: linux-gpio@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/11922/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org> --- arch/mips/ar7/gpio.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/mips/ar7/gpio.c b/arch/mips/ar7/gpio.c index f4930456eb8e8..f969f583c68c6 100644 --- a/arch/mips/ar7/gpio.c +++ b/arch/mips/ar7/gpio.c @@ -37,7 +37,7 @@ static int ar7_gpio_get_value(struct gpio_chip *chip, unsigned gpio) container_of(chip, struct ar7_gpio_chip, chip); void __iomem *gpio_in = gpch->regs + AR7_GPIO_INPUT; - return readl(gpio_in) & (1 << gpio); + return !!(readl(gpio_in) & (1 << gpio)); } static int titan_gpio_get_value(struct gpio_chip *chip, unsigned gpio) -- GitLab