mfd: tc6393xb: 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: Dmitry Baryshkov <dbaryshkov@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/tc6393xb.c b/drivers/mfd/tc6393xb.c
index 8c84a513016b6869e6cb03e0324d5729c18ba16d..1ecbfa40d1b32b28ba7f2672f858b9b38e512ca4 100644 (file)
--- a/drivers/mfd/tc6393xb.c
+++ b/drivers/mfd/tc6393xb.c
@@ -437,8 +437,8 @@ static int tc6393xb_gpio_get(struct gpio_chip *chip,
        struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
 
        /* XXX: does dsr also represent inputs? */
-       return tmio_ioread8(tc6393xb->scr + SCR_GPO_DSR(offset / 8))
-               & TC_GPIO_BIT(offset);
+       return !!(tmio_ioread8(tc6393xb->scr + SCR_GPO_DSR(offset / 8))
+                 & TC_GPIO_BIT(offset));
 }
 
 static void __tc6393xb_gpio_set(struct gpio_chip *chip,