diff --git a/drivers/firewire/core-topology.c b/drivers/firewire/core-topology.c
index ec68ed2..b63d55f5 100644
--- a/drivers/firewire/core-topology.c
+++ b/drivers/firewire/core-topology.c
@@ -58,6 +58,7 @@ static u32 *count_ports(u32 *sid, int *total_port_count, int *child_port_count)
 		case SELFID_PORT_PARENT:
 		case SELFID_PORT_NCONN:
 			(*total_port_count)++;
+			fallthrough;
 		case SELFID_PORT_NONE:
 			break;
 		}