static void arcmsr_hbaC_flush_cache(struct AdapterControlBlock *pACB)
{
	struct MessageUnit_C __iomem *reg = pACB->pmuC;
	int retry_count = 30;/* enlarge wait flush adapter cache time: 10 minute */
	writel(ARCMSR_INBOUND_MESG0_FLUSH_CACHE, &reg->inbound_msgaddr0);
	writel(ARCMSR_HBCMU_DRV2IOP_MESSAGE_CMD_DONE, &reg->inbound_doorbell);
	do {
		if (arcmsr_hbaC_wait_msgint_ready(pACB)) {
			break;
		} else {
			retry_count--;
			printk(KERN_NOTICE "arcmsr%d: wait 'flush adapter cache' \
			timeout,retry count down = %d \n", pACB->host->host_no, retry_count);
		}
	} while (retry_count != 0);
	return;
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.