From: Linus Walleij <linus.walleij@linaro.org>
Date: Tue, 22 Dec 2015 14:47:05 +0000 (+0100)
Subject: mfd: asic3: Be sure to clamp return value
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=f8e3a514bf98a94255bd1534a21aebaf795b7a13;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

mfd: asic3: 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: Paul Parsons <lost.distance@yahoo.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---

diff --git a/drivers/mfd/asic3.c b/drivers/mfd/asic3.c
index a726f01e3b02..73812eedeefb 100644
--- a/drivers/mfd/asic3.c
+++ b/drivers/mfd/asic3.c
@@ -502,7 +502,8 @@ static int asic3_gpio_get(struct gpio_chip *chip,
 		return -EINVAL;
 	}
 
-	return asic3_read_register(asic, gpio_base + ASIC3_GPIO_STATUS) & mask;
+	return !!(asic3_read_register(asic,
+				      gpio_base + ASIC3_GPIO_STATUS) & mask);
 }
 
 static void asic3_gpio_set(struct gpio_chip *chip,