hci_dev_do_close
int hci_dev_do_close(struct hci_dev *hdev);
hci_dev_do_close(hdev);
if (!hci_dev_do_close(hdev))
hci_dev_do_close(hdev);
err = hci_dev_do_close(hdev);
hci_dev_do_close(hdev);
hci_dev_do_close(hdev);
hci_dev_do_close(hdev);