diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c
index d59d99347d543b145e615c8854667f145bdd994f..1f02e65fe3056e609fc0b060f4878f4f5a372598 100644
--- a/drivers/usb/core/hcd-pci.c
+++ b/drivers/usb/core/hcd-pci.c
@@ -75,7 +75,7 @@ static void for_each_companion(struct pci_dev *pdev, struct usb_hcd *hcd,
 				PCI_SLOT(companion->devfn) != slot)
 			continue;
 		companion_hcd = pci_get_drvdata(companion);
-		if (!companion_hcd)
+		if (!companion_hcd || !companion_hcd->self.root_hub)
 			continue;
 		fn(pdev, hcd, companion, companion_hcd);
 	}