static int cqspi_wait_idle(struct cqspi_st *cqspi)
{
	const unsigned int poll_idle_retry = 3;
	unsigned int count = 0;
	unsigned long timeout;

	timeout = jiffies + msecs_to_jiffies(CQSPI_TIMEOUT_MS);
	while (1) {
		/*
		 * Read few times in succession to ensure the controller
		 * is indeed idle, that is, the bit does not transition
		 * low again.
		 */
		if (cqspi_is_idle(cqspi))
			count++;
		else
			count = 0;

		if (count >= poll_idle_retry)
			return 0;

		if (time_after(jiffies, timeout)) {
			/* Timeout, in busy mode. */
			dev_err(&cqspi->pdev->dev,
				"QSPI is still busy after %dms timeout.\n",
				CQSPI_TIMEOUT_MS);
			return -ETIMEDOUT;
		}

		cpu_relax();
	}
}

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.