ISP_REQ_Q_IN
wrt_reg_word(ISP_REQ_Q_IN(ha, reg), 0);
wrt_reg_word(ISP_REQ_Q_IN(ha, reg), req->ring_index);
rd_reg_word_relaxed(ISP_REQ_Q_IN(ha, reg)); /* PCI Posting. */
wrt_reg_word(ISP_REQ_Q_IN(ha, ®->isp),
rd_reg_word_relaxed(ISP_REQ_Q_IN(ha, ®->isp));