RTL_ECC_DMA_SIZE
dma_sync_single_for_device(rtlc->dev, rtlc->buf_dma, RTL_ECC_DMA_SIZE, DMA_TO_DEVICE);
dma_sync_single_for_cpu(rtlc->dev, rtlc->buf_dma, RTL_ECC_DMA_SIZE, DMA_FROM_DEVICE);
rtlc->buf = dma_alloc_noncoherent(dev, RTL_ECC_DMA_SIZE, &rtlc->buf_dma,
dma_free_noncoherent(rtlc->dev, RTL_ECC_DMA_SIZE, rtlc->buf, rtlc->buf_dma,