Re: [PATCH v2 2/2] drm/sun4i: tcon: prevent tcon->panel dereference if null

[Giulio Benetti]

Hi,

Il 04/10/2018 21:56, Maxime Ripard ha scritto:
> On Wed, Oct 03, 2018 at 04:24:58PM +0200, Giulio Benetti wrote:
> > If using tcon with VGA,
>
> We don't have support for VGA at the moment. Or are you talking about
> using a VGA bridge?

You're right, in general VGA is not the point.
tcon->panel is retrieved by drm_of_find_panel_or_bridge() and panel can 
be present or not.

> > tcon->panel will be null(0), this will cause segmentation fault when
> > trying to dereference tcon->panel->connector.
>
> It's not a segmentation fault, but a null pointer dereference. And
> that case will also happen with bridges.

Right.

Going to improve/rewrite commit logs and submit v2 patchset.

Thanks for reviewing.

Best regards
--
Giulio Benetti
CTO

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