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authorLinus Walleij <linus.walleij@linaro.org>2015-12-22 00:45:55 +0300
committerLinus Walleij <linus.walleij@linaro.org>2016-01-25 20:02:26 +0300
commita80bb4c9ec200ab4fc3ad502bf80e00ca5db12a7 (patch)
tree3828d08fab52b54a922fa00901ac7076a98b0e40 /arch/unicore32
parenta4ce4b8dae68e7233ba699f10e9c120df31f5824 (diff)
downloadlinux-a80bb4c9ec200ab4fc3ad502bf80e00ca5db12a7.tar.xz
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>
Diffstat (limited to 'arch/unicore32')
-rw-r--r--arch/unicore32/kernel/gpio.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/unicore32/kernel/gpio.c b/arch/unicore32/kernel/gpio.c
index cb12ec39552c..5ab23794ea17 100644
--- 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)