Re: [PATCH v4] v4l: subdev: tolerate null in media_entity_to_v4l2_subdev

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Em Thu, 8 Jun 2017 22:32:10 +0300
Sakari Ailus <sakari.ailus@xxxxxx> escreveu:

> Hi Mauro,
> 
> On Thu, Jun 08, 2017 at 03:00:22PM -0300, Mauro Carvalho Chehab wrote:
> > Em Wed,  7 Jun 2017 10:52:07 +0100
> > Kieran Bingham <kbingham@xxxxxxxxxx> escreveu:
> >   
> > > From: Kieran Bingham <kieran.bingham+renesas@xxxxxxxxxxxxxxxx>
> > > 
> > > Return NULL, if a null entity is parsed for it's v4l2_subdev
> > > 
> > > Signed-off-by: Kieran Bingham <kieran.bingham+renesas@xxxxxxxxxxxxxxxx>  
> > 
> > Could you please improve this patch description?
> > 
> > I'm unsure if this is a bug fix, or some sort of feature...
> > 
> > On what situations would a null entity be passed to this function?  
> 
> I actually proposed this patch. This change is simply for convenience ---
> the caller doesn't need to make sure the subdev is non-NULL, possibly
> obtained from e.g. media_entity_remote_pad() which returns NULL all links to
> the pad are disabled. This is a recurring pattern, and making this change
> avoids an additional check.
> 
> Having something along these lines in the patch description wouldn't hurt.

Patch added, with a description based on the above.

Thanks!

Mauro



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