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gpio: mpc8xxx: Be sure to clamp return value

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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>
This commit is contained in:
Linus Walleij 2015-12-21 11:20:56 +01:00
parent 6f14dd6964
commit c759174e73
1 changed files with 1 additions and 1 deletions
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2
drivers/gpio/gpio-mpc8xxx.c
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@ -79,7 +79,7 @@ static int mpc8572_gpio_get(struct gpio_chip *gc, unsigned int gpio)
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)