[23/54] gpio: viperboard: Be sure to clamp return value

Message ID 1450794495-23585-1-git-send-email-linus.walleij@linaro.org
State New
Headers show

Commit Message

Linus Walleij Dec. 22, 2015, 2:28 p.m.
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>

---
 drivers/gpio/gpio-viperboard.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

-- 
2.4.3

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diff --git a/drivers/gpio/gpio-viperboard.c b/drivers/gpio/gpio-viperboard.c
index 26e7edb74f42..7667e77dd52e 100644
--- a/drivers/gpio/gpio-viperboard.c
+++ b/drivers/gpio/gpio-viperboard.c
@@ -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);