--- sle12.orig/drivers/xen/xen-pciback/pci_stub.c
+++ sle12/drivers/xen/xen-pciback/pci_stub.c
@@ -1502,6 +1502,44 @@ parse_error:
 fs_initcall(pcistub_init);
 #endif
 
+#ifdef CONFIG_PCI_IOV
+static int pci_stub_notifier(struct notifier_block *nb,
+			     unsigned long action, void *data)
+{
+	struct device *dev = data;
+	struct pci_dev *pdev = to_pci_dev(dev);
+
+	switch (action) {
+	case BUS_NOTIFY_UNBIND_DRIVER:
+		for (;;) {
+			struct pcistub_device *psdev;
+			unsigned long flags;
+			bool found = false;
+
+			spin_lock_irqsave(&pcistub_devices_lock, flags);
+
+			list_for_each_entry(psdev, &pcistub_devices, dev_list)
+				if (!psdev->pdev && psdev->dev != pdev
+				    && pci_physfn(psdev->dev) == pdev) {
+					found = true;
+					break;
+				}
+			spin_unlock_irqrestore(&pcistub_devices_lock, flags);
+			if (!found)
+				break;
+			device_release_driver(&psdev->dev->dev);
+		}
+		break;
+	}
+
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block pci_stub_nb = {
+	.notifier_call = pci_stub_notifier,
+};
+#endif
+
 static int __init xen_pcibk_init(void)
 {
 	int err;
@@ -1523,6 +1561,10 @@ static int __init xen_pcibk_init(void)
 	err = xen_pcibk_xenbus_register();
 	if (err)
 		pcistub_exit();
+#ifdef CONFIG_PCI_IOV
+	else
+		bus_register_notifier(&pci_bus_type, &pci_stub_nb);
+#endif
 
 	return err;
 }