diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c
index 0d9c3831838f..0efa977c422d 100644
--- a/drivers/net/ethernet/realtek/r8169.c
+++ b/drivers/net/ethernet/realtek/r8169.c
@@ -7071,17 +7071,20 @@ 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_01 ... RTL_GIGA_MAC_VER_06:
 		RTL_W8(tp, Cfg9346, Cfg9346_Unlock);
 		RTL_W8(tp, Config2, RTL_R8(tp, Config2) & ~MSIEnable);
 		RTL_W8(tp, Cfg9346, Cfg9346_Lock);
 		flags = PCI_IRQ_LEGACY;
-	} else if (tp->mac_version == RTL_GIGA_MAC_VER_40) {
+		break;
+	case RTL_GIGA_MAC_VER_39 ... RTL_GIGA_MAC_VER_40:
 		/* This version was reported to have issues with resume
 		 * from suspend when using MSI-X
 		 */
 		flags = PCI_IRQ_LEGACY | PCI_IRQ_MSI;
-	} else {
+		break;
+	default:
 		flags = PCI_IRQ_ALL_TYPES;
 	}