XLLF_RDFO_OFFSET
if (!ioread32(fifo->base_addr + XLLF_RDFO_OFFSET)) {
ioread32(fifo->base_addr + XLLF_RDFO_OFFSET));
if (ioread32(fifo->base_addr + XLLF_RDFO_OFFSET))
{"rdfo", XLLF_RDFO_OFFSET},