TDES0_OWN
p->des0 &= cpu_to_le32(~TDES0_OWN);
return (le32_to_cpu(p->des0) & TDES0_OWN) >> 31;
p->des0 |= cpu_to_le32(TDES0_OWN);
p->des0 |= cpu_to_le32(TDES0_OWN);
if (unlikely(tdes0 & TDES0_OWN))