unicore: 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: Guan Xuetao <gxt@mprc.pku.edu.cn>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/arch/unicore32/kernel/gpio.c b/arch/unicore32/kernel/gpio.c
index cb12ec39552c0d2fd75ac466093f93bcf22cfd3f..5ab23794ea17009f284e0bc3ab6e25a71b121900 100644 (file)
--- a/arch/unicore32/kernel/gpio.c
+++ b/arch/unicore32/kernel/gpio.c
@@ -52,7 +52,7 @@ device_initcall(puv3_gpio_leds_init);
 
 static int puv3_gpio_get(struct gpio_chip *chip, unsigned offset)
 {
-       return readl(GPIO_GPLR) & GPIO_GPIO(offset);
+       return !!(readl(GPIO_GPLR) & GPIO_GPIO(offset));
 }
 
 static void puv3_gpio_set(struct gpio_chip *chip, unsigned offset, int value)