I40E_QTX_ENA
wr32(hw, I40E_QTX_ENA(i), 0);
tx_reg = rd32(&pf->hw, I40E_QTX_ENA(pf_q));
tx_reg = rd32(hw, I40E_QTX_ENA(pf_q));
wr32(hw, I40E_QTX_ENA(pf_q), tx_reg);
wr32(&pf->hw, I40E_QTX_ENA(pf_q), 0);