ASoC: ac97: 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.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/soc-ac97.c

@@ -92,7 +92,7 @@ static int snd_soc_ac97_gpio_get(struct gpio_chip *chip, unsigned offset)
 	dev_dbg(codec->dev, "get gpio %d : %d\n", offset,
 		ret < 0 ? ret : ret & (1 << offset));
 
-	return ret < 0 ? ret : ret & (1 << offset);
+	return ret < 0 ? ret : !!(ret & (1 << offset));
 }
 
 static void snd_soc_ac97_gpio_set(struct gpio_chip *chip, unsigned offset,