[01/54] gpio: da9052: Be sure to clamp return value

Message ID 1450793371-21804-1-git-send-email-linus.walleij@linaro.org
State New
Headers show

Commit Message

Linus Walleij Dec. 22, 2015, 2:09 p.m.
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>

---
 drivers/gpio/gpio-da9052.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

-- 
2.4.3

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Patch

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;
 	}