diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
index 9f881fc102f73..36900d65386fc 100644
--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -794,6 +794,7 @@ int __init dmar_dev_scope_init(void)
 			info = dmar_alloc_pci_notify_info(dev,
 					BUS_NOTIFY_ADD_DEVICE);
 			if (!info) {
+				pci_dev_put(dev);
 				return dmar_dev_scope_status;
 			} else {
 				dmar_pci_bus_add_dev(info);