DMA_MAX_CHAN_BYTES
bytes = min_t(size_t, len - offset, DMA_MAX_CHAN_BYTES);
if (len > DMA_MAX_CHAN_BYTES) {
if (period_len > DMA_MAX_CHAN_BYTES) {
dma_set_max_seg_size(dma_dev->dev, DMA_MAX_CHAN_BYTES);