mt_bdma_desc
struct mt_bdma_desc *bd = dma->bd;
memset(bd, 0, sizeof(struct mt_bdma_desc) * MAX_BD_NUM);
MAX_BD_NUM * sizeof(struct mt_bdma_desc),
MAX_BD_NUM * sizeof(struct mt_bdma_desc),
dma_free_coherent(&pdev->dev, MAX_BD_NUM * sizeof(struct mt_bdma_desc),
struct mt_bdma_desc *bd; /* pointer to bd array */
struct mt_bdma_desc *bd;