Move drm_vblank_cleanup() after lastclose.

This may prevent a possible panic on shutdown.

bsd-core/drm_drv.c

@@ -524,12 +524,12 @@ static void drm_unload(struct drm_device *dev)
 		DRM_DEBUG("mtrr_del = %d", retcode);
 	}
 
-	drm_vblank_cleanup(dev);
-
 	DRM_LOCK();
 	drm_lastclose(dev);
 	DRM_UNLOCK();
 
+	drm_vblank_cleanup(dev);
+
 	/* Clean up PCI resources allocated by drm_bufs.c.  We're not really
 	 * worried about resource consumption while the DRM is inactive (between
 	 * lastclose and firstopen or unload) because these aren't actually

linux-core/drm_drv.c

@@ -397,11 +397,11 @@ static void drm_cleanup(struct drm_device * dev)
 		return;
 	}
 
-	drm_vblank_cleanup(dev);
-
 	drm_lastclose(dev);
 	drm_fence_manager_takedown(dev);
 
+	drm_vblank_cleanup(dev);
+
 	if (drm_core_has_MTRR(dev) && drm_core_has_AGP(dev) && dev->agp
 	    && dev->agp->agp_mtrr >= 0) {
 		int retval;