static int gdrom_get_last_session()

in gdrom.c [313:353]

• 33 lines of code
• 8 McCabe index (conditional complexity)

static int gdrom_get_last_session(struct cdrom_device_info *cd_info,
	struct cdrom_multisession *ms_info)
{
	int fentry, lentry, track, data, err;

	if (!gd.toc)
		return -ENOMEM;

	/* Check if GD-ROM */
	err = gdrom_readtoc_cmd(gd.toc, 1);
	/* Not a GD-ROM so check if standard CD-ROM */
	if (err) {
		err = gdrom_readtoc_cmd(gd.toc, 0);
		if (err) {
			pr_info("Could not get CD table of contents\n");
			return -ENXIO;
		}
	}

	fentry = get_entry_track(gd.toc->first);
	lentry = get_entry_track(gd.toc->last);
	/* Find the first data track */
	track = get_entry_track(gd.toc->last);
	do {
		data = gd.toc->entry[track - 1];
		if (get_entry_q_ctrl(data))
			break;	/* ie a real data track */
		track--;
	} while (track >= fentry);

	if ((track > 100) || (track < get_entry_track(gd.toc->first))) {
		pr_info("No data on the last session of the CD\n");
		gdrom_getsense(NULL);
		return -ENXIO;
	}

	ms_info->addr_format = CDROM_LBA;
	ms_info->addr.lba = get_entry_lba(data);
	ms_info->xa_flag = 1;
	return 0;
}