wire_trans_dma_xfer
struct wire_trans_dma_xfer *out_trans;
out_trans = (struct wire_trans_dma_xfer *)&wrapper->trans;
struct wire_trans_dma_xfer **out_trans)
*out_trans = (struct wire_trans_dma_xfer *)&trans_wrapper->trans;
struct wire_trans_dma_xfer *out_trans;