host->dma.used_gpd = 0;
host->dma.used_bd = 0;
+ mmc_dev(mmc)->dma_mask = NULL;
/* using dma_alloc_coherent*/ /* todo: using 1, for all 4 slots */
host->dma.gpd = dma_alloc_coherent(NULL, MAX_GPD_NUM * sizeof(gpd_t), &host->dma.gpd_addr, GFP_KERNEL);