l2cap_do_send
l2cap_do_send(chan, skb);
l2cap_do_send(chan, skb);
l2cap_do_send(chan, tx_skb);
l2cap_do_send(chan, tx_skb);
l2cap_do_send(chan, skb_dequeue(&chan->tx_q));
l2cap_do_send(chan, skb);
l2cap_do_send(chan, skb);