drm: Destroy the planes prior to destroying the associated CRTC

As during the plane cleanup, we wish to disable the hardware and
so may modify state on the associated CRTC, that CRTC must continue to
exist until we are finished.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=54101Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: stable@vger.kernel.org
Reviewed-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Tested-by: Nlu hua <huax.lu@intel.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>

drivers/gpu/drm/drm_crtc.c

@@ -1034,15 +1034,15 @@ void drm_mode_config_cleanup(struct drm_device *dev)
 		fb->funcs->destroy(fb);
 	}
 
-	list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) {
-		crtc->funcs->destroy(crtc);
-	}
-
 	list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list,
 				 head) {
 		plane->funcs->destroy(plane);
 	}
 
+	list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) {
+		crtc->funcs->destroy(crtc);
+	}
+
 	idr_remove_all(&dev->mode_config.crtc_idr);
 	idr_destroy(&dev->mode_config.crtc_idr);
 }