--- zzzz-none-000/linux-4.4.60/net/bridge/br_stp_if.c 2017-04-08 07:53:53.000000000 +0000 +++ jet-2400-727/linux-4.4.60/net/bridge/br_stp_if.c 2021-03-17 14:36:41.000000000 +0000 @@ -166,6 +166,7 @@ br_debug(br, "using kernel STP\n"); /* To start timers on any ports left in blocking */ + mod_timer(&br->hello_timer, jiffies + br->hello_time); br_port_state_selection(br); }