diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 0d3fce6596af..5ce7ec724a40 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -1776,6 +1776,9 @@ static void probe_alloc_default_domain(struct bus_type *bus,
 {
 	struct __group_domain_type gtype;
 
+	if (group->default_domain)
+		return;
+
 	memset(&gtype, 0, sizeof(gtype));
 
 	/* Ask for default domain requirements of all devices in the group */