- /*
- * bounce... copy the data back into/from the original buffer
- * XXX How do you handle DMA_BIDIRECTIONAL here ?
- */
- if (dir == DMA_FROM_DEVICE)
- memcpy(buffer, dma_addr, size);
- else if (dir == DMA_TO_DEVICE)
- memcpy(dma_addr, buffer, size);
- else
+ switch (target) {
+ case SYNC_FOR_CPU:
+ if (likely(dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL))
+ memcpy(buffer, dma_addr, size);
+ else
+ BUG_ON(dir != DMA_TO_DEVICE);
+ break;
+ case SYNC_FOR_DEVICE:
+ if (likely(dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL))
+ memcpy(dma_addr, buffer, size);
+ else
+ BUG_ON(dir != DMA_FROM_DEVICE);
+ break;
+ default: