Re: [PATCH 01/22] [media] v4l2-async: move code out of v4l2_async_notifier_register into v4l2_async_test_nofity_all

[Marek Vasut]

On 10/07/2016 06:00 PM, Philipp Zabel wrote:
> This will be reused in the following patch to catch already registered,
> newly added asynchronous subdevices from v4l2_async_register_subdev.
> 
> Signed-off-by: Philipp Zabel <p.za...@pengutronix.de>
> ---
>  drivers/media/v4l2-core/v4l2-async.c | 38 
> +++++++++++++++++++++---------------
>  1 file changed, 22 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/media/v4l2-core/v4l2-async.c 
> b/drivers/media/v4l2-core/v4l2-async.c
> index 5bada20..c4f1930 100644
> --- a/drivers/media/v4l2-core/v4l2-async.c
> +++ b/drivers/media/v4l2-core/v4l2-async.c
> @@ -134,11 +134,31 @@ static void v4l2_async_cleanup(struct v4l2_subdev *sd)
>       sd->dev = NULL;
>  }
>  
> +static int v4l2_async_test_notify_all(struct v4l2_async_notifier *notifier)
> +{
> +     struct v4l2_subdev *sd, *tmp;
> +
> +     list_for_each_entry_safe(sd, tmp, &subdev_list, async_list) {
> +             struct v4l2_async_subdev *asd;
> +             int ret;
> +
> +             asd = v4l2_async_belongs(notifier, sd);
> +             if (!asd)
> +                     continue;
> +
> +             ret = v4l2_async_test_notify(notifier, sd, asd);
> +             if (ret < 0)
> +                     return ret;
> +     }
> +
> +     return 0;
> +}
> +
>  int v4l2_async_notifier_register(struct v4l2_device *v4l2_dev,
>                                struct v4l2_async_notifier *notifier)
>  {
> -     struct v4l2_subdev *sd, *tmp;
>       struct v4l2_async_subdev *asd;
> +     int ret;
>       int i;
>  
>       if (!notifier->num_subdevs || notifier->num_subdevs > V4L2_MAX_SUBDEVS)
> @@ -171,23 +191,9 @@ int v4l2_async_notifier_register(struct v4l2_device 
> *v4l2_dev,
>       /* Keep also completed notifiers on the list */
>       list_add(&notifier->list, &notifier_list);
>  
> -     list_for_each_entry_safe(sd, tmp, &subdev_list, async_list) {
> -             int ret;
> -
> -             asd = v4l2_async_belongs(notifier, sd);
> -             if (!asd)
> -                     continue;
> -
> -             ret = v4l2_async_test_notify(notifier, sd, asd);
> -             if (ret < 0) {
> -                     mutex_unlock(&list_lock);
> -                     return ret;
> -             }
> -     }

Shouldn't you call ret = v4l2_async_test_notify_all() here now instead ?

>       mutex_unlock(&list_lock);
>  
> -     return 0;
> +     return ret;
>  }
>  EXPORT_SYMBOL(v4l2_async_notifier_register);
>  
> 


-- 
Best regards,
Marek Vasut
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