Re: [PATCH v16 15/32] v4l: async: Register sub-devices before calling bound callback

[Sebastian Reichel <sre@kernel.org>]

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Hi,

On Thu, Oct 26, 2017 at 10:53:25AM +0300, Sakari Ailus wrote:
> Register the sub-device before calling the notifier's bound callback.
> Doing this the other way around is problematic as the struct v4l2_device
> has not assigned for the sub-device yet and may be required by the bound
> callback.
> 
> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
> Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
> Acked-by: Pavel Machek <pavel@ucw.cz>
> ---

Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>

-- Sebastian

>  drivers/media/v4l2-core/v4l2-async.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/media/v4l2-core/v4l2-async.c b/drivers/media/v4l2-core/v4l2-async.c
> index e170682dae78..46db85685894 100644
> --- a/drivers/media/v4l2-core/v4l2-async.c
> +++ b/drivers/media/v4l2-core/v4l2-async.c
> @@ -130,13 +130,13 @@ static int v4l2_async_match_notify(struct v4l2_async_notifier *notifier,
>  {
>  	int ret;
>  
> -	ret = v4l2_async_notifier_call_bound(notifier, sd, asd);
> +	ret = v4l2_device_register_subdev(notifier->v4l2_dev, sd);
>  	if (ret < 0)
>  		return ret;
>  
> -	ret = v4l2_device_register_subdev(notifier->v4l2_dev, sd);
> +	ret = v4l2_async_notifier_call_bound(notifier, sd, asd);
>  	if (ret < 0) {
> -		v4l2_async_notifier_call_unbind(notifier, sd, asd);
> +		v4l2_device_unregister_subdev(sd);
>  		return ret;
>  	}
>  
> -- 
> 2.11.0
> 

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