powerpc: qe_lib/gpio: 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: Anatolij Gustschin <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Michael Ellerman <[email protected]>
Signed-off-by: Linus Walleij <[email protected]>

diff --git a/drivers/soc/fsl/qe/gpio.c b/drivers/soc/fsl/qe/gpio.c
index aa5c11acf212d708130771bf5545c0c81452360f..65845712571ce16d60bbd030ea144ca0241b5f9b 100644 (file)
--- a/drivers/soc/fsl/qe/gpio.c
+++ b/drivers/soc/fsl/qe/gpio.c
@@ -63,7 +63,7 @@ static int qe_gpio_get(struct gpio_chip *gc, unsigned int gpio)
        struct qe_pio_regs __iomem *regs = mm_gc->regs;
        u32 pin_mask = 1 << (QE_PIO_PINS - 1 - gpio);
 
-       return in_be32(&regs->cpdata) & pin_mask;
+       return !!(in_be32(&regs->cpdata) & pin_mask);
 }
 
 static void qe_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val)