On 18:04 Fri 10 May , Alexander Shiyan wrote:
> Patch adds gpio_to_desc helper for validate GPIO.
> A bit optimization is performed (about -250 bytes on ARM).
>
> Signed-off-by: Alexander Shiyan <shc_work@xxxxxxx>
> ---
> drivers/gpio/gpiolib.c | 97 ++++++++++++++++++++++++++------------------------
> 1 file changed, 51 insertions(+), 46 deletions(-)
>
> diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
> index 6398268..d7aa094 100644
> --- a/drivers/gpio/gpiolib.c
> +++ b/drivers/gpio/gpiolib.c
> @@ -32,20 +32,30 @@ static int gpio_ensure_requested(struct gpio_info *gi, int gpio)
> return gpio_request(gpio, "gpio");
> }
>
> +static struct gpio_info *gpio_to_desc(unsigned gpio)
> +{
> + if (!gpio_is_valid(gpio))
put the WARN too as we need to known a gpio_xxx is used on a non valid gpio
> + return NULL;
> +
> + if (!gpio_desc[gpio].chip)
> + return NULL;
> +
> + return &gpio_desc[gpio];
> +}
> +
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