TS_DMA_BYTES
u8 dma_buf[TS_DMA_BYTES];
TS_DMA_BYTES, DMA_FROM_DEVICE);
dma_unmap_single(&pluto->pdev->dev, pluto->dma_addr, TS_DMA_BYTES,
TS_DMA_BYTES, DMA_FROM_DEVICE);
TS_DMA_BYTES, DMA_FROM_DEVICE);