dadk_iodone
pktp = dadk_pktprep(dadkp, NULL, bp, dadk_iodone, func, arg);
dadk_iodone(pktp->cp_bp);
pktp = dadk_pktprep(dadkp, NULL, bp, dadk_iodone, NULL, NULL);
static void dadk_iodone(struct buf *bp);
dadk_iodone, DDI_DMA_SLEEP, NULL);