From: Ville Syrjälä <ville.syrjala@linux.intel.com>
Date: Fri, 21 Nov 2014 19:00:36 +0000 (+0200)
Subject: drm/i915: Don't clobber crtc->new_config when nothing changes
X-Git-Tag: omap-for-v3.20/drop-legacy-3517~77^2~9^2~17
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b9950a133f8bcfbe30ad11ae27ed75668fffe5cd;p=pandora-kernel.git

drm/i915: Don't clobber crtc->new_config when nothing changes

When doing a nop modeset we currently leave crtc->new_config point at
the already freed temporary pipe_config. That will anger the sanity
checks in intel_modeset_update_state() when the nop modeset gets
followed by a GPU reset on gen3/4 where the display block gets fully
reinitialized during the reset.

So leave crtc->new_config alone until we know a modeset is actually
required.

Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---

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