ata_id_queue_depth
int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
max_queue_depth = min(max_queue_depth, ata_id_queue_depth(dev->id));
depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
qdepth = ata_id_queue_depth(ata_dev->id);