ASC_OVERRUN_BSIZE
asc_dvc_varp->overrun_buf = kzalloc(ASC_OVERRUN_BSIZE, GFP_KERNEL);
ASC_OVERRUN_BSIZE, DMA_FROM_DEVICE);
ASC_OVERRUN_BSIZE, DMA_FROM_DEVICE);
ASC_OVERRUN_BSIZE, DMA_FROM_DEVICE);
phy_size = cpu_to_le32(ASC_OVERRUN_BSIZE);
ASC_OVERRUN_BSIZE, DMA_FROM_DEVICE);