diff --git a/drivers/gpu/drm/amd/display/dc/dm_services.h b/drivers/gpu/drm/amd/display/dc/dm_services.h
index 11a0abfd341870c4137f9233243873734290bc90..052a43af1bd340b91e61778eebf801c9307ccea4 100644
--- a/drivers/gpu/drm/amd/display/dc/dm_services.h
+++ b/drivers/gpu/drm/amd/display/dc/dm_services.h
@@ -165,6 +165,7 @@ static inline uint32_t set_reg_field_value_ex(
 	uint32_t mask,
 	uint8_t shift)
 {
+	ASSERT(mask != 0);
 	return (reg_value & ~mask) | (mask & (value << shift));
 }