dma_addr_t mapping;
mapping = dma_map_single(cp->dev, buffer, len, DMA_FROM_DEVICE);
dma_addr_t mapping;
mapping = dma_map_single(cp->dev, buffer, len, DMA_FROM_DEVICE);
/*
* reduce current DMA mapping usage,
* delay and try again later or
/*
* reduce current DMA mapping usage,
* delay and try again later or