dma_maxpq
(src_cnt <= dma_maxpq(device, 0) ||
dma_maxpq(device, DMA_PREP_CONTINUE) > 0) &&
if (unmap && disks <= dma_maxpq(device, 0) &&
pq_src_cnt = min(src_cnt, dma_maxpq(dma, dma_flags));
src->cnt = min_odd(params->pq_sources | 1, dma_maxpq(dev, 0));