ATA_DFLAG_NCQ_OFF
dev->flags |= ATA_DFLAG_NCQ_OFF;
dev->flags |= ATA_DFLAG_NCQ_OFF;
dev->flags &= ~ATA_DFLAG_NCQ_OFF;
ata_dev->flags |= ATA_DFLAG_NCQ_OFF;
return ata_ncq_supported(dev) && !(dev->flags & ATA_DFLAG_NCQ_OFF);