diff --git a/drivers/gpu/drm/i915/gt/selftest_engine_cs.c b/drivers/gpu/drm/i915/gt/selftest_engine_cs.c
index 761d81f4bd68036938e8c60fe997cef1ebdd1ac3..f88e445a1cae84358cd16de76579fb910e4ded26 100644
--- a/drivers/gpu/drm/i915/gt/selftest_engine_cs.c
+++ b/drivers/gpu/drm/i915/gt/selftest_engine_cs.c
@@ -108,7 +108,7 @@ static u32 trifilter(u32 *a)
 
 	sort(a, COUNT, sizeof(*a), cmp_u32, NULL);
 
-	sum += mul_u32_u32(a[2], 2);
+	sum = mul_u32_u32(a[2], 2);
 	sum += a[1];
 	sum += a[3];