From: Paulo Zanoni <paulo.r.zanoni@intel.com>
Date: Wed, 12 Jun 2013 20:27:25 +0000 (-0300)
Subject: drm/i915: propagate errors from intel_dp_init_connector
X-Git-Tag: v3.11-rc1~65^2~16^2~36
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=16c255335b0ec39b4e5e976f4b260978aeed5a68;p=pandora-kernel.git

drm/i915: propagate errors from intel_dp_init_connector

In case we detect a "ghost eDP", intel_edp_init_connector frees both
the connector and encoder and then returns. On Haswell, intel_ddi_init
then tries to use the freed encoder on the HDMI initialization path
since the following commit:

commit 21a8e6a4853b2ed39fa4c5188a710f2cf1b92026
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Wed Apr 10 23:28:35 2013 +0200
    drm/i915: don't setup hdmi for port D edp in ddi_init

So now on intel_ddi_init we check for the "ghost eDP" case and return
without trying to initialize HDMI. This way we won't try to read the
freed "intel_encoder" struct in the next "if" statement.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Zoltan Nyul <zoltan.nyul@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---

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