From: Linus Walleij <linus.walleij@linaro.org>
Date: Mon, 21 Dec 2015 09:30:02 +0000 (+0100)
Subject: gpio: da9052: Be sure to clamp return value
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=1f66adfb5eb81428bc1a5700cffd22ba8e772272;p=deliverable%2Flinux.git

gpio: da9052: 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: Ashish Jangam <ashish.jangam@kpitcummins.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---

diff --git a/drivers/gpio/gpio-da9052.c b/drivers/gpio/gpio-da9052.c
index 2e9578ec0ca1..38bd8f122bfc 100644
--- a/drivers/gpio/gpio-da9052.c
+++ b/drivers/gpio/gpio-da9052.c
@@ -89,15 +89,12 @@ static int da9052_gpio_get(struct gpio_chip *gc, unsigned offset)
 					      DA9052_STATUS_D_REG);
 		if (ret < 0)
 			return ret;
-		if (ret & (1 << DA9052_GPIO_SHIFT_COUNT(offset)))
-			return 1;
-		else
-			return 0;
+		return !!(ret & (1 << DA9052_GPIO_SHIFT_COUNT(offset)));
 	case DA9052_OUTPUT_PUSHPULL:
 		if (da9052_gpio_port_odd(offset))
-			return ret & DA9052_GPIO_ODD_PORT_MODE;
+			return !!(ret & DA9052_GPIO_ODD_PORT_MODE);
 		else
-			return ret & DA9052_GPIO_EVEN_PORT_MODE;
+			return !!(ret & DA9052_GPIO_EVEN_PORT_MODE);
 	default:
 		return -EINVAL;
 	}