gpio: davinci: 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: Sekhar Nori <nsekhar@ti.com>
Cc: Santosh Shilimkar <santosh.shilimkar@ti.com>
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/gpio/gpio-davinci.c b/drivers/gpio/gpio-davinci.c
index 65ebaef935e1edca2477cedd93b5a846d937c87c..1e3a617e0c10d2ef95cdbeaff8ef19e86094a502 100644 (file)
--- a/drivers/gpio/gpio-davinci.c
+++ b/drivers/gpio/gpio-davinci.c
@@ -125,7 +125,7 @@ static int davinci_gpio_get(struct gpio_chip *chip, unsigned offset)
        struct davinci_gpio_controller *d = chip2controller(chip);
        struct davinci_gpio_regs __iomem *g = d->regs;
 
-       return (1 << offset) & readl_relaxed(&g->in_data);
+       return !!((1 << offset) & readl_relaxed(&g->in_data));
 }
 
 /*