[PATCH v3 2/2] drm/sun4i: tcon: prevent tcon->panel dereference if NULL

[Icenowy Zheng]

在 2018-10-08一的 11:21 +0200，Maxime Ripard写道：
> On Fri, Oct 05, 2018 at 11:59:51PM +0200, Giulio Benetti wrote:
> > If tcon->panel pointer is NULL, trying to dereference from it
> > (i.e. tcon->panel->connector) will cause a null pointer
> > dereference.
> > 
> > Add tcon->panel null pointer check before calling
> > sun4i_tcon0_mode_set_dithering().
> > 
> > Signed-off-by: Giulio Benetti <giulio.benetti at micronovasrl.com>
> > Fixes: f11adcecbd5f ("drm/sun4i: tcon: Add dithering support for
> >                       RGB565/RGB666 LCD panels")
> > Reviewed-by: Chen-Yu Tsai <wens at csie.org>
> 
> Applied both, thanks!

Please bring them to 4.20.

Currently in 4.20-rc1, bridge support of sun4i-drm is broken because of
this problem.

> Maxime
> 
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