qla2xxx: Decrease pci access for response queue processing for ISPFX00.

Signed-off-by: NArmen Baloyan <armen.baloyan@qlogic.com>
Signed-off-by: NSaurav Kashyap <saurav.kashyap@qlogic.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

drivers/scsi/qla2xxx/qla_mr.c

@@ -2676,7 +2676,7 @@ qlafx00_process_response_queue(struct scsi_qla_host *vha,
 	uint16_t lreq_q_out = 0;
 
 	lreq_q_in = RD_REG_DWORD(rsp->rsp_q_in);
-	lreq_q_out = RD_REG_DWORD(rsp->rsp_q_out);
+	lreq_q_out = rsp->ring_index;
 
 	while (lreq_q_in != lreq_q_out) {
 		lptr = rsp->ring_ptr;