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gpio: viperboard: 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: Lars Poeschel <poeschel@lemonage.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Linus Walleij 2015-12-21 14:58:52 +01:00
parent c9d4ab030c
commit 80776df4f5
1 changed files with 1 additions and 1 deletions
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2
drivers/gpio/gpio-viperboard.c
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@ -95,7 +95,7 @@ static int vprbrd_gpioa_get(struct gpio_chip *chip,
/* if io is set to output, just return the saved value */
if (gpio->gpioa_out & (1 << offset))
return gpio->gpioa_val & (1 << offset);
return !!(gpio->gpioa_val & (1 << offset));
mutex_lock(&vb->lock);