ARM: sa1100/simpad: 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: arm@kernel.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>

diff --git a/arch/arm/mach-sa1100/simpad.c b/arch/arm/mach-sa1100/simpad.c
index 41e476e571d7f8b2be7a78b312fe3d699c8eebe8..d8965c682d2f74a800204dc55ecc6fae0d5def5f 100644 (file)
--- a/arch/arm/mach-sa1100/simpad.c
+++ b/arch/arm/mach-sa1100/simpad.c
@@ -98,8 +98,8 @@ static void cs3_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
 static int cs3_gpio_get(struct gpio_chip *chip, unsigned offset)
 {
        if (offset > 15)
-               return simpad_get_cs3_ro() & (1 << (offset - 16));
-       return simpad_get_cs3_shadow() & (1 << offset);
+               return !!(simpad_get_cs3_ro() & (1 << (offset - 16)));
+       return !!(simpad_get_cs3_shadow() & (1 << offset));
 };
 
 static int cs3_gpio_direction_input(struct gpio_chip *chip, unsigned offset)