linux-kernel - Re: [PATCH 2/8] [media] v4l2-async: call registered

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Date:	Thu, 11 Aug 2016 22:28:24 +0300
From:	Sakari Ailus <sakari.ailus@....fi>
To:	Javier Martinez Canillas <javier@....samsung.com>
Cc:	linux-kernel@...r.kernel.org,
	Mauro Carvalho Chehab <mchehab@....samsung.com>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Hans Verkuil <hans.verkuil@...co.com>,
	linux-media@...r.kernel.org
Subject: Re: [PATCH 2/8] [media] v4l2-async: call registered_async after
 subdev registration

Hi Javier,

On Thu, Aug 11, 2016 at 12:14:01PM -0400, Javier Martinez Canillas wrote:
> Hello Sakari,
> 
> Thanks a lot for your feedback.
> 
> On 08/11/2016 07:18 AM, Sakari Ailus wrote:
> > On Thu, Aug 11, 2016 at 02:10:43PM +0300, Sakari Ailus wrote:
> 
> [snip]
> 
> >>>  
> >>> +	ret = v4l2_subdev_call(sd, core, registered_async);
> >>> +	if (ret < 0) {
> >>> +		if (notifier->unbind)
> >>> +			notifier->unbind(notifier, sd, asd);
> >>> +		return ret;
> >>> +	}
> >>> +
> >>>  	if (list_empty(&notifier->waiting) && notifier->complete)
> >>>  		return notifier->complete(notifier);
> >>
> >> I noticed this just now but what do you need this and the next patch for?
> >>
> >> We already have a callback for the same purpose: it's
> >> v4l2_subdev_ops.internal_ops.registered(). And there's similar
> >> unregistered() callback as well.
> >>
> 
> Oh, I missed we already had those calls. When adding the connector
> support, I looked at struct v4l2_subdev_core_ops and didn't find a
> callback that fit but didn't notice we already had a .registered()
> in struct struct v4l2_subdev_internal_ops. Sorry about that...

No worries. I hadn't time to review the patches either.

> >> Could you use these callbacks instead?
> 
> Yes, those can be used indeed. I'll post patches using that instead
> and removing the .registered_async callback since as you said isn't
> really needed.

I'd appreciate that! Please cc me when you do so.

-- 
Kind regards,

Sakari Ailus
e-mail: sakari.ailus@....fi	XMPP: sailus@...iisi.org.uk