Re: [PATCH 45/54] mfd: asic3: Be sure to clamp return value

[Lee Jones <lee.jones@xxxxxxxxxx>]

On Tue, 22 Dec 2015, Linus Walleij wrote:

> 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@xxxxxxxxx>
> Cc: Lee Jones <lee.jones@xxxxxxxxxx>
> Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
> ---
> Lee: as mentioned in 00/54: either apply this directly
> or ACK it and I will take it into the GPIO tree.
> ---
>  drivers/mfd/asic3.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)

Applied, thanks.

> diff --git a/drivers/mfd/asic3.c b/drivers/mfd/asic3.c
> index a726f01e3b02..58c4d9cb8e8d 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,

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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