.queuecommand           = ata_scsi_queuecmd,
        .can_queue              = ATA_DEF_QUEUE,
        .this_id                = ATA_SHT_THIS_ID,
-       .sg_tablesize           = LIBATA_MAX_PRD,
+       .sg_tablesize           = LIBATA_DUMB_MAX_PRD,
        .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
        .emulated               = ATA_SHT_EMULATED,
        .use_clustering         = ATA_SHT_USE_CLUSTERING,
        .bmdma_stop     = atiixp_bmdma_stop,
        .bmdma_status   = ata_bmdma_status,
 
-       .qc_prep        = ata_qc_prep,
+       .qc_prep        = ata_dumb_qc_prep,
        .qc_issue       = ata_qc_issue_prot,
 
        .data_xfer      = ata_data_xfer,