diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index 8651f6d4dfa0..1b1ca63e6bbe 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -2525,6 +2525,9 @@ struct dmar_domain *find_domain(struct device *dev)
 {
 	struct device_domain_info *info;
 
+	if (unlikely(!dev || !dev->iommu))
+		return NULL;
+
 	if (unlikely(attach_deferred(dev)))
 		return NULL;