AE_FLAG_LINK
IFF_DRV_RUNNING || (sc->flags & AE_FLAG_LINK) == 0)
sc->flags &= ~AE_FLAG_LINK;
sc->flags |= AE_FLAG_LINK;
if ((sc->flags & AE_FLAG_LINK) != 0) {
if ((sc->flags & AE_FLAG_LINK) == 0)
sc->flags &= ~AE_FLAG_LINK;
sc->flags &= ~AE_FLAG_LINK;