openwrt_lede/package/network/services/ppp/patches/530-pppoe_send_padt.patch

--- a/pppd/plugins/rp-pppoe/plugin.c
+++ b/pppd/plugins/rp-pppoe/plugin.c
@@ -275,7 +275,7 @@ PPPOEDisconnectDevice(void)
 		sizeof(struct sockaddr_pppox)) < 0)
 	error("Failed to disconnect PPPoE socket: %d %m", errno);
     close(conn->sessionSocket);
-    /* don't send PADT?? */
+    sendPADT(conn, NULL);
     if (conn->discoverySocket >= 0)
 	close(conn->discoverySocket);
 }