OWNbit
if (unlikely(le32_to_cpu(desc->status) & OWNbit)) {
desc->status = cpu_to_le32(OWNbit | INTbit | DEFbit | CRCbit | PADbit);
desc->status = cpu_to_le32(OWNbit | INTbit);
if (le32_to_cpu(desc->status) & OWNbit)
if (status & OWNbit)