diff --git a/drivers/gpu/drm/drm_rect.c b/drivers/gpu/drm/drm_rect.c
index 4063f6e4ea9fff9a23082c9121e809248bdeb35d..73e53a8d1b37c08a64ea862dacf51739fe85c15a 100644
--- a/drivers/gpu/drm/drm_rect.c
+++ b/drivers/gpu/drm/drm_rect.c
@@ -100,7 +100,7 @@ static int drm_calc_scale(int src, int dst)
 {
 	int scale = 0;
 
-	if (src < 0 || dst < 0)
+	if (WARN_ON(src < 0 || dst < 0))
 		return -EINVAL;
 
 	if (dst == 0)