From eecdf59ad2fb90d8238a42e2ec41f165964349bb Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Mon, 21 Dec 2015 22:41:42 +0100 Subject: [PATCH] powerpc: ppc4cc/gpio: 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: Anatolij Gustschin Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Cc: Michael Ellerman Signed-off-by: Linus Walleij --- arch/powerpc/sysdev/ppc4xx_gpio.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/sysdev/ppc4xx_gpio.c b/arch/powerpc/sysdev/ppc4xx_gpio.c index fc65ad1..d7a7ef13 100644 --- a/arch/powerpc/sysdev/ppc4xx_gpio.c +++ b/arch/powerpc/sysdev/ppc4xx_gpio.c @@ -78,7 +78,7 @@ static int ppc4xx_gpio_get(struct gpio_chip *gc, unsigned int gpio) struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc); struct ppc4xx_gpio __iomem *regs = mm_gc->regs; - return in_be32(®s->ir) & GPIO_MASK(gpio); + return !!(in_be32(®s->ir) & GPIO_MASK(gpio)); } static inline void -- 2.7.4