static int pmcraid_change_queue_type(struct scsi_device *scsi_dev, int tag)
{
	struct pmcraid_resource_entry *res;

	res = (struct pmcraid_resource_entry *)scsi_dev->hostdata;

	if ((res) && scsi_dev->tagged_supported &&
	    (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry))) {
		scsi_set_tag_type(scsi_dev, tag);

		if (tag)
			scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth);
		else
			scsi_deactivate_tcq(scsi_dev, scsi_dev->queue_depth);
	} else
		tag = 0;

	return tag;
}

This weakness involves numeric computation errors, such as integer overflows, underflows, or precision losses, which can lead to miscalculations and exploitable behaviors in software.