static noinline int mmc_ioctl_cdrom_subchannel()

in cdrom.c [3058:3081]

• 22 lines of code
• 6 McCabe index (conditional complexity)

static noinline int mmc_ioctl_cdrom_subchannel(struct cdrom_device_info *cdi,
					       void __user *arg)
{
	int ret;
	struct cdrom_subchnl q;
	u_char requested, back;
	if (copy_from_user(&q, (struct cdrom_subchnl __user *)arg, sizeof(q)))
		return -EFAULT;
	requested = q.cdsc_format;
	if (!((requested == CDROM_MSF) ||
	      (requested == CDROM_LBA)))
		return -EINVAL;

	ret = cdrom_read_subchannel(cdi, &q, 0);
	if (ret)
		return ret;
	back = q.cdsc_format; /* local copy */
	sanitize_format(&q.cdsc_absaddr, &back, requested);
	sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
	if (copy_to_user((struct cdrom_subchnl __user *)arg, &q, sizeof(q)))
		return -EFAULT;
	/* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
	return 0;
}