ASC_STATS_ADD
#define ASC_STATS(shost, counter) ASC_STATS_ADD(shost, counter, 1)
ASC_STATS_ADD(scp->device->host, xfer_elem,
ASC_STATS_ADD(scp->device->host, xfer_sect,
ASC_STATS_ADD(scp->device->host, xfer_sect,
ASC_STATS_ADD(scp->device->host, xfer_elem, use_sg);