HIFN_FLAG_CMD_BUSY
if (!(dev->flags & HIFN_FLAG_CMD_BUSY)) {
dev->flags |= HIFN_FLAG_CMD_BUSY;
if (dma->cmdu == 0 && (dev->flags & HIFN_FLAG_CMD_BUSY)) {
dev->flags &= ~HIFN_FLAG_CMD_BUSY;