PUFFS_FBIO_ERROR
feb.what = *what & (PUFFS_FBIO_READ|PUFFS_FBIO_WRITE|PUFFS_FBIO_ERROR);
*what = PUFFS_FBIO_ERROR;
puffs__framev_notify(fio, PUFFS_FBIO_ERROR);
what |= PUFFS_FBIO_ERROR;
if (what & PUFFS_FBIO_ERROR)