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>

diff --git a/arch/mips/ar7/gpio.c b/arch/mips/ar7/gpio.c
index f4930456eb8e8181098c6035dccdd1203d72ea18..f969f583c68c66c0512d7c648dc16d22c18158f6 100644 (file)
--- 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)