ATA_PROT_FLAG_DMA
ATA_PROT_DMA = ATA_PROT_FLAG_DMA,
ATA_PROT_NCQ = ATA_PROT_FLAG_DMA | ATA_PROT_FLAG_NCQ,
ATAPI_PROT_DMA = ATA_PROT_FLAG_ATAPI | ATA_PROT_FLAG_DMA,
return prot & ATA_PROT_FLAG_DMA;
return prot & (ATA_PROT_FLAG_PIO | ATA_PROT_FLAG_DMA);