diff --git a/drivers/gpu/drm/radeon/evergreen_cs.c b/drivers/gpu/drm/radeon/evergreen_cs.c
index 3142ef4da7f4..9196f85db9ce 100644
--- a/drivers/gpu/drm/radeon/evergreen_cs.c
+++ b/drivers/gpu/drm/radeon/evergreen_cs.c
@@ -312,8 +312,10 @@ static int evergreen_surface_check(struct radeon_cs_parser *p,
 	case ARRAY_2D_TILED_THIN1:
 		return evergreen_surface_check_2d(p, surf, prefix);
 	default:
-		dev_warn(p->dev, "%s:%d %s invalid array mode %d\n",
-				__func__, __LINE__, prefix, surf->mode);
+		if (prefix) {
+			dev_warn(p->dev, "%s:%d %s invalid array mode %d\n",
+					__func__, __LINE__, prefix, surf->mode);
+		}
 		return -EINVAL;
 	}
 	return -EINVAL;