eir_create_adv_data
u8 eir_create_adv_data(struct hci_dev *hdev, u8 instance, u8 *ptr, u8 size);
len = eir_create_adv_data(hdev, instance, pdu->data,
len = eir_create_adv_data(hdev, instance, cp.data, sizeof(cp.data));