mfd: htc-egpio: 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: Philipp Zabel <philipp.zabel@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

diff --git a/drivers/mfd/htc-egpio.c b/drivers/mfd/htc-egpio.c
index 6ccaf90d98fd6e1020da79583c076591d683342b..e4f4a31b76d96647cf73b8fcf96b1339804c7164 100644 (file)
--- a/drivers/mfd/htc-egpio.c
+++ b/drivers/mfd/htc-egpio.c
@@ -163,7 +163,7 @@ static int egpio_get(struct gpio_chip *chip, unsigned offset)
        value = egpio_readw(ei, reg);
        pr_debug("readw(%p + %x) = %x\n",
                        ei->base_addr, reg << ei->bus_shift, value);
-       return value & bit;
+       return !!(value & bit);
 }
 
 static int egpio_direction_input(struct gpio_chip *chip, unsigned offset)