static ssize_t pmcraid_show_adapter_id(
	struct device *dev,
	struct device_attribute *attr,
	char *buf
)
{
	struct Scsi_Host *shost = class_to_shost(dev);
	struct pmcraid_instance *pinstance =
		(struct pmcraid_instance *)shost->hostdata;
	u32 adapter_id = (pinstance->pdev->bus->number << 8) |
		pinstance->pdev->devfn;
	u32 aen_group = pmcraid_event_family.id;

	return snprintf(buf, PAGE_SIZE,
			"adapter id: %d\nminor: %d\naen group: %d\n",
			adapter_id, MINOR(pinstance->cdev.dev), aen_group);
}

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