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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>
This commit is contained in:
Linus Walleij 2015-12-21 10:30:02 +01:00
parent 50e8df09e4
commit 1f66adfb5e
1 changed files with 3 additions and 6 deletions
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9
drivers/gpio/gpio-da9052.c
View File

@ -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;
}