Index: net/if_ethersubr.c
===================================================================
--- net/if_ethersubr.c
+++ net/if_ethersubr.c
@@ -1132,6 +1132,7 @@
 			error = EINVAL;
 		else
 			ifp->if_pcp = ifr->ifr_lan_pcp;
+		EVENTHANDLER_INVOKE(ifnet_pcp_event, ifp);
 		break;
 
 	case SIOCGLANPCP:
Index: net/if_var.h
===================================================================
--- net/if_var.h
+++ net/if_var.h
@@ -418,6 +418,10 @@
 /* Interface link state change event */
 typedef void (*ifnet_link_event_handler_t)(void *, struct ifnet *, int);
 EVENTHANDLER_DECLARE(ifnet_link_event, ifnet_link_event_handler_t);
+/* */
+typedef void (*ifnet_pcp_event_t)(void *, struct ifnet *, int);
+EVENTHANDLER_DECLARE(ifnet_pcp_event, ifnet_pcp_event_t);
+
 /* Interface up/down event */
 #define IFNET_EVENT_UP		0
 #define IFNET_EVENT_DOWN	1