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authorLinus Walleij <linus.walleij@linaro.org>2015-12-22 00:44:02 +0300
committerLinus Walleij <linus.walleij@linaro.org>2016-01-25 20:02:26 +0300
commita4ce4b8dae68e7233ba699f10e9c120df31f5824 (patch)
tree866a093bc6c17d52a1b23be782d5ad64bb7e9125 /arch/powerpc/sysdev
parente847396b40d07931f5d2835f73220e16a1a413b3 (diff)
downloadlinux-a4ce4b8dae68e7233ba699f10e9c120df31f5824.tar.xz
powerpc: simple_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: Anton Vorontsov <anton@enomsg.org> Cc: Anatolij Gustschin <agust@denx.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'arch/powerpc/sysdev')
-rw-r--r--arch/powerpc/sysdev/simple_gpio.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/sysdev/simple_gpio.c b/arch/powerpc/sysdev/simple_gpio.c
index ff5e73230a36..56ce8ca3281b 100644
--- a/arch/powerpc/sysdev/simple_gpio.c
+++ b/arch/powerpc/sysdev/simple_gpio.c
@@ -46,7 +46,7 @@ static int u8_gpio_get(struct gpio_chip *gc, unsigned int gpio)
{
struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
- return in_8(mm_gc->regs) & u8_pin2mask(gpio);
+ return !!(in_8(mm_gc->regs) & u8_pin2mask(gpio));
}
static void u8_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val)