__ata_qc_from_tag
qc = __ata_qc_from_tag(ap, ATA_TAG_INTERNAL);
qc = __ata_qc_from_tag(ap, link->active_tag);
qc = __ata_qc_from_tag(ap, link->active_tag);
qc = __ata_qc_from_tag(ap, tag);
qc = __ata_qc_from_tag(ap, tag);
qc = __ata_qc_from_tag(ap, ap->link.active_tag);
qc = __ata_qc_from_tag(ap, ap->link.active_tag);
__ata_qc_for_each(ap, qc, tag, ATA_MAX_QUEUE, __ata_qc_from_tag)
struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);