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Message-ID: <f140c083f59eabf6ea323d15d655473e8a77d813.camel@aosc.io>
Date: Mon, 05 Nov 2018 21:23:08 +0800
From: Icenowy Zheng <icenowy@...c.io>
To: Maxime Ripard <maxime.ripard@...tlin.com>,
Giulio Benetti <giulio.benetti@...ronovasrl.com>
Cc: David Airlie <airlied@...ux.ie>, Chen-Yu Tsai <wens@...e.org>,
linux-arm-kernel@...ts.infradead.org,
dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/2] drm/sun4i: tcon: prevent tcon->panel dereference
if NULL
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@...ronovasrl.com>
> > Fixes: f11adcecbd5f ("drm/sun4i: tcon: Add dithering support for
> > RGB565/RGB666 LCD panels")
> > Reviewed-by: Chen-Yu Tsai <wens@...e.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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