IF_READY
if (!(idev->if_flags & IF_READY))
idev->if_flags |= IF_READY;
if (idev->if_flags & IF_READY) {
idev->if_flags |= IF_READY;
was_ready = idev->if_flags & IF_READY;
idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
if (idev->dead || !(idev->if_flags & IF_READY))
if (!(idev->if_flags & IF_READY)) {
if (idev->dead || !(idev->if_flags & IF_READY)) {
ndev->if_flags |= IF_READY;
if (!idev->dead && (idev->if_flags & IF_READY) &&