desc_limit_scaled
dt->size = desc_limit_scaled(&desc); /* what if limit > 65535? */
if (desc_limit_scaled(&tr_seg) < 103)
if (io_bitmap_ptr + port/8 > desc_limit_scaled(&tr_seg))
desc_limit = desc_limit_scaled(&next_tss_desc);
lim = desc_limit_scaled(&desc);