HCI_UART_VND_DETECT
if (!test_bit(HCI_UART_VND_DETECT, &hu->hdev_flags))
BIT(HCI_UART_VND_DETECT);
set_bit(HCI_UART_VND_DETECT, &hu->hdev_flags);
if (!test_bit(HCI_UART_VND_DETECT, &hu->hdev_flags))