diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 0c9edc9d7c44..4c9fb8b323e8 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -4104,6 +4104,9 @@ static int pci_quirk_cavium_acs(struct pci_dev *dev, u16 acs_flags)
 	 */
 	acs_flags &= ~(PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_SV | PCI_ACS_UF);
 
+	if (!((dev->device >= 0xa000) && (dev->device <= 0xa0ff)))
+		return -ENOTTY;
+
 	return acs_flags ? 0 : 1;
 }