Re: [PATCH v2 05/11] gpiolib: use gpiochip_get_desc() in lineevent_create()

[Andy Shevchenko <andy.shevchenko@xxxxxxxxx>]

On Wed, Dec 4, 2019 at 6:05 PM Bartosz Golaszewski <brgl@xxxxxxxx> wrote:
>
> From: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>
>
> Unduplicate the ngpio check by simply calling gpiochip_get_desc() and
> checking its return value.
>

Reviewed-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>

> Signed-off-by: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>
> ---
>  drivers/gpio/gpiolib.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
> index 6ef55cc1188b..17796437d7be 100644
> --- a/drivers/gpio/gpiolib.c
> +++ b/drivers/gpio/gpiolib.c
> @@ -1009,8 +1009,9 @@ static int lineevent_create(struct gpio_device *gdev, void __user *ip)
>         lflags = eventreq.handleflags;
>         eflags = eventreq.eventflags;
>
> -       if (offset >= gdev->ngpio)
> -               return -EINVAL;
> +       desc = gpiochip_get_desc(gdev->chip, offset);
> +       if (IS_ERR(desc))
> +               return PTR_ERR(desc);
>
>         /* Return an error if a unknown flag is set */
>         if ((lflags & ~GPIOHANDLE_REQUEST_VALID_FLAGS) ||
> @@ -1048,7 +1049,6 @@ static int lineevent_create(struct gpio_device *gdev, void __user *ip)
>                 }
>         }
>
> -       desc = &gdev->descs[offset];
>         ret = gpiod_request(desc, le->label);
>         if (ret)
>                 goto out_free_label;
> --
> 2.23.0
>


-- 
With Best Regards,
Andy Shevchenko