From: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Date: Fri, 24 Oct 2014 13:51:34 +0000 (+0100)
Subject: drm/i915: only flip frontbuffer if crtc is active
X-Git-Tag: omap-for-v3.20/drop-legacy-3517~77^2~64^2~130
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3f20df98870236b288a90fc3b65f593d3db05b17;p=pandora-kernel.git

drm/i915: only flip frontbuffer if crtc is active

There is no point in flipping a buffer for a disabled crtc.

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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