-proto=$(nvram get ${type}_proto)
-if_valid $if && $DEBUG ifconfig $if down
-kill $(cat /var/run/${if}.pid 2>&-) 2>&-
-[ "$if" = "ppp0" ] && killall pppd
-killall ifup.$proto >&- 2>&-
+
+case "$if_proto" in
+ pppoa) hotplug_dev unregister atm0; exit 0 ;;
+ ""|none) exit 0;;
+esac
+
+[ "${if%%[0-9]*}" = "ppp" ] && if="$(nvram get ${if_proto}_ifname)"
+
+if [ "${if%%[0-9]}" = "br" ]; then
+ for sif in $(nvram get ${type}_ifnames); do
+ hotplug_dev unregister "$sif"
+ done
+fi
+
+hotplug_dev unregister "$if"