diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index a71dd669a728226629c03007fdf68073f9f8597c..e1dd6ea60d67050f2784a08d2ec2589eef040a35 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -6586,13 +6586,18 @@ static int rtl_alloc_irq(struct rtl8169_private *tp)
 {
 	unsigned int flags;
 
-	if (tp->mac_version <= RTL_GIGA_MAC_VER_06) {
+	switch (tp->mac_version) {
+	case RTL_GIGA_MAC_VER_02 ... RTL_GIGA_MAC_VER_06:
 		rtl_unlock_config_regs(tp);
 		RTL_W8(tp, Config2, RTL_R8(tp, Config2) & ~MSIEnable);
 		rtl_lock_config_regs(tp);
+		/* fall through */
+	case RTL_GIGA_MAC_VER_07 ... RTL_GIGA_MAC_VER_24:
 		flags = PCI_IRQ_LEGACY;
-	} else {
+		break;
+	default:
 		flags = PCI_IRQ_ALL_TYPES;
+		break;
 	}
 
 	return pci_alloc_irq_vectors(tp->pci_dev, 1, 1, flags);