NVME_SGL_FMT_LAST_SEG_DESC
sge->type = NVME_SGL_FMT_LAST_SEG_DESC << 4;
sgls[nr_descs - 1].type == (NVME_SGL_FMT_LAST_SEG_DESC << 4)) {
seg.type != (NVME_SGL_FMT_LAST_SEG_DESC << 4)) {