Re: [PATCH] [media] v4l2-async: Pass the v4l2_async_subdev to the unbind callback

[Sakari Ailus]

Hi Alban,

On Tue, May 10, 2016 at 03:19:14PM +0200, Alban Bedel wrote:
> v4l2_async_cleanup() is always called before before calling the

s/before //

> unbind() callback. However v4l2_async_cleanup() clear the asd member,

s/clear/clears/

> so when calling the unbind() callback the v4l2_async_subdev is always
> NULL. To fix this save the asd before calling v4l2_async_cleanup().

Oh dear...! How could this have happened? :-o

With the commit message changes,

Acked-by: Sakari Ailus <sakari.ai...@linux.intel.com>

> 
> Signed-off-by: Alban Bedel <alban.be...@avionic-design.de>
> ---
>  drivers/media/v4l2-core/v4l2-async.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/media/v4l2-core/v4l2-async.c 
> b/drivers/media/v4l2-core/v4l2-async.c
> index a4b224d..ceb28d4 100644
> --- a/drivers/media/v4l2-core/v4l2-async.c
> +++ b/drivers/media/v4l2-core/v4l2-async.c
> @@ -220,6 +220,7 @@ void v4l2_async_notifier_unregister(struct 
> v4l2_async_notifier *notifier)
>       list_del(&notifier->list);
>  
>       list_for_each_entry_safe(sd, tmp, &notifier->done, async_list) {
> +             struct v4l2_async_subdev *asd = sd->asd;
>               struct device *d;
>  
>               d = get_device(sd->dev);
> @@ -230,7 +231,7 @@ void v4l2_async_notifier_unregister(struct 
> v4l2_async_notifier *notifier)
>               device_release_driver(d);
>  
>               if (notifier->unbind)
> -                     notifier->unbind(notifier, sd, sd->asd);
> +                     notifier->unbind(notifier, sd, asd);
>  
>               /*
>                * Store device at the device cache, in order to call
> @@ -313,6 +314,7 @@ EXPORT_SYMBOL(v4l2_async_register_subdev);
>  void v4l2_async_unregister_subdev(struct v4l2_subdev *sd)
>  {
>       struct v4l2_async_notifier *notifier = sd->notifier;
> +     struct v4l2_async_subdev *asd = sd->asd;
>  
>       if (!sd->asd) {
>               if (!list_empty(&sd->async_list))
> @@ -327,7 +329,7 @@ void v4l2_async_unregister_subdev(struct v4l2_subdev *sd)
>       v4l2_async_cleanup(sd);
>  
>       if (notifier->unbind)
> -             notifier->unbind(notifier, sd, sd->asd);
> +             notifier->unbind(notifier, sd, asd);
>  
>       mutex_unlock(&list_lock);
>  }

-- 
Kind regards,

Sakari Ailus
e-mail: sakari.ai...@iki.fi     XMPP: sai...@retiisi.org.uk