read_stage2_from_disk
static int read_stage2_from_disk(int, ig_stage2_t *, int);
if (read_stage2_from_disk(dev_fd, &stage2_disk, device->type)
ret = read_stage2_from_disk(device->part_fd, stage2, device->type);
ret = read_stage2_from_disk(curr_device->part_fd, stage2_curr,