diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c
index 63e8881..5d4bc64 100644
--- a/drivers/gpu/drm/drm_crtc_helper.c
+++ b/drivers/gpu/drm/drm_crtc_helper.c
@@ -588,7 +588,7 @@
 	if (set->x != set->crtc->x || set->y != set->crtc->y)
 		fb_changed = true;
 
-	if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) {
+	if (!drm_mode_equal(set->mode, &set->crtc->mode)) {
 		DRM_DEBUG_KMS("modes are different, full mode set\n");
 		drm_mode_debug_printmodeline(&set->crtc->mode);
 		drm_mode_debug_printmodeline(set->mode);