hci_acl_open
struct hci_link *hci_acl_open(struct hci_unit *, bdaddr_t *);
sco->hl_link = hci_acl_open(unit, bdaddr);
new->lc_link = hci_acl_open(link->hl_unit, &link->hl_bdaddr);
chan->lc_link = hci_acl_open(unit, &chan->lc_raddr.bt_bdaddr);
sco->hl_link = hci_acl_open(unit, &pcb->sp_raddr);