static void pmcraid_cancel_all(struct pmcraid_cmd *cmd, u32 sense)
{
	struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
	struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
	struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata;
	void (*cmd_done) (struct pmcraid_cmd *) = sense ? pmcraid_erp_done
							: pmcraid_request_sense;

	memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
	ioarcb->request_flags0 = SYNC_OVERRIDE;
	ioarcb->request_type = REQ_TYPE_IOACMD;
	ioarcb->cdb[0] = PMCRAID_CANCEL_ALL_REQUESTS;

	if (RES_IS_GSCSI(res->cfg_entry))
		ioarcb->cdb[1] = PMCRAID_SYNC_COMPLETE_AFTER_CANCEL;

	ioarcb->ioadl_bus_addr = 0;
	ioarcb->ioadl_length = 0;
	ioarcb->data_transfer_length = 0;
	ioarcb->ioarcb_bus_addr &= (~0x1FULL);

	/* writing to IOARRIN must be protected by host_lock, as mid-layer
	 * schedule queuecommand while we are doing this
	 */
	pmcraid_send_cmd(cmd, cmd_done,
			 PMCRAID_REQUEST_SENSE_TIMEOUT,
			 pmcraid_timeout_handler);
}

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