PROGRESS_PARAMS_PADDED_SIZE
u8 pad[PROGRESS_PARAMS_PADDED_SIZE];
PROGRESS_PARAMS_PADDED_SIZE, DMA_FROM_DEVICE);
dma_unmap_single(pdev, buf->dma_addr, PROGRESS_PARAMS_PADDED_SIZE, DMA_FROM_DEVICE);
dma_sync_single_for_cpu(dev, buf->dma_addr, PROGRESS_PARAMS_PADDED_SIZE,
dma_unmap_single(dev, buf->dma_addr, PROGRESS_PARAMS_PADDED_SIZE, DMA_FROM_DEVICE);