gpio: mpc8xxx: 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: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/gpio/gpio-mpc8xxx.c b/drivers/gpio/gpio-mpc8xxx.c
index 48ef368..de4cd22 100644
--- a/drivers/gpio/gpio-mpc8xxx.c
+++ b/drivers/gpio/gpio-mpc8xxx.c
@@ -79,7 +79,7 @@
val = in_be32(mm->regs + GPIO_DAT) & ~out_mask;
out_shadow = mpc8xxx_gc->data & out_mask;
- return (val | out_shadow) & mpc8xxx_gpio2mask(gpio);
+ return !!((val | out_shadow) & mpc8xxx_gpio2mask(gpio));
}
static int mpc8xxx_gpio_get(struct gpio_chip *gc, unsigned int gpio)