gpio: sx150x: 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.

This also starts to propagate the error code from the I2C
transaction as the end of the series adds support for that.

Cc: Wei Chen <Wei.Chen@csr.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/gpio/gpio-sx150x.c b/drivers/gpio/gpio-sx150x.c
index 2d882964b309cce88c3b7faa6f737890c08a8e7d..04d4f2c2928a705f1733a284c280c0ed67d1c726 100644 (file)
--- a/drivers/gpio/gpio-sx150x.c
+++ b/drivers/gpio/gpio-sx150x.c
@@ -344,7 +344,7 @@ static int sx150x_gpio_get(struct gpio_chip *gc, unsigned offset)
                mutex_unlock(&chip->lock);
        }
 
-       return status;
+       return (status < 0) ? status : !!status;
 }
 
 static void sx150x_gpio_set(struct gpio_chip *gc, unsigned offset, int val)