br_stp_set_port_priority
ret = br_stp_set_port_priority(p, args[2]);
err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
ret = br_stp_set_port_priority(p, v);