DN_DRIVER_HELD
{ "DN_DRIVER_HELD", DN_DRIVER_HELD, DN_DRIVER_HELD },
dnp->dn_flags &= ~DN_DRIVER_HELD;
dnp->dn_flags &= ~(DN_DRIVER_HELD|DN_DRIVER_INACTIVE);
if (dnp->dn_flags & DN_DRIVER_HELD) {
dnp->dn_flags |= (DN_DRIVER_HELD | DN_NO_AUTODETACH);
dnp->dn_flags |= DN_DRIVER_HELD;
dnp->dn_flags &= ~(DN_DRIVER_HELD|DN_NO_AUTODETACH);