I think;
commit a26f9f9ad0e679c7ce413a25d34f6914e1174151
Author: chandra konduru <chandra.konduru@intel.com>
Date: Mon Mar 30 13:52:04 2015 -0700
i-g-t: Adding plane scaling test case
introduced a condition where it attempts to update a disabled plane because
of the newly introduced size_changed flag which is set for disabled frame
buffers. Result is a NULL ptr deref in igt_drm_plane_commit (plane->fb->src_x).
Start recognising this case as disabled plane and act accordingly.
v2: Split out igt_plane_set_fb cleanup. (Thomas Wood)
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: chandra konduru <chandra.konduru@intel.com>
Cc: Thomas Wood <thomas.wood@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
759bb7ac98