should be checked if "cur" is txable, not "port".
Introduced by commit 
6e88e1357c "team: use function team_port_txable()
for determing enabled and up port"
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
                return port;
        cur = port;
        list_for_each_entry_continue_rcu(cur, &team->port_list, list)
-               if (team_port_txable(port))
+               if (team_port_txable(cur))
                        return cur;
        list_for_each_entry_rcu(cur, &team->port_list, list) {
                if (cur == port)
                        break;
-               if (team_port_txable(port))
+               if (team_port_txable(cur))
                        return cur;
        }
        return NULL;