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igt_kms: Avoid NULL ptr deref when commiting disabled planes

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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>
This commit is contained in:
Tvrtko Ursulin 2015-05-12 11:06:35 +01:00 committed by Daniel Vetter
parent 8a5736b496
commit 759bb7ac98
1 changed files with 1 additions and 1 deletions
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2
lib/igt_kms.c
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@ -1331,7 +1331,7 @@ static int igt_drm_plane_commit(igt_plane_t *plane,
fb_id = igt_plane_get_fb_id(plane);
crtc_id = output->config.crtc->crtc_id;
if (plane->fb_changed && fb_id == 0) {
if ((plane->fb_changed || plane->size_changed) && fb_id == 0) {
LOG(display,
"%s: SetPlane pipe %s, plane %d, disabling\n",
igt_output_name(output),