func (d *SerialDriver) Stop() error {
	d.Lock()
	defer d.Unlock()
	return d.Driver.Stop()
}
func (d *SerialDriver) Stop() error {
	d.Lock()
	defer d.Unlock()
	return d.Driver.Stop()
}
func ( d * SerialDriver ) Stop ( ) error { d . Lock ( ) defer d . Unlock ( ) return d . Driver . Stop ( ) }
// Stop a host gracefully
Stop a host gracefully