dma_wait_for_async_tx
if (dma_wait_for_async_tx(depend_tx) != DMA_COMPLETE)
if (dma_wait_for_async_tx(*tx) != DMA_COMPLETE)
EXPORT_SYMBOL_GPL(dma_wait_for_async_tx);
enum dma_status dma_wait_for_async_tx(struct dma_async_tx_descriptor *tx);
status = dma_wait_for_async_tx(desc);