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authorLinus Walleij <linus.walleij@linaro.org>2015-12-22 17:40:27 +0300
committerRalf Baechle <ralf@linux-mips.org>2016-01-24 04:21:47 +0300
commit249e573d99ab590e19bd23f084f8c6540daa7b06 (patch)
tree45ba3b4418a1f89a1d6344740cbb19ab46daa2f7 /arch/mips/ar7
parent7b42c00a95c02d962b18f8ed8bf59b65ae58d3ee (diff)
downloadlinux-249e573d99ab590e19bd23f084f8c6540daa7b06.tar.xz
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>
Diffstat (limited to 'arch/mips/ar7')
-rw-r--r--arch/mips/ar7/gpio.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/mips/ar7/gpio.c b/arch/mips/ar7/gpio.c
index f4930456eb8e..f969f583c68c 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)