HCI_OP_WRITE_ENCRYPT_MODE
err = hci_cmd_sync_status(hdev, HCI_OP_WRITE_ENCRYPT_MODE,
HCI_CC_STATUS(HCI_OP_WRITE_ENCRYPT_MODE, hci_cc_write_encrypt_mode),
sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_ENCRYPT_MODE);