static void xhci_reset(DeviceState *dev)
{
    XHCIState *xhci = XHCI(dev);
    int i;

    trace_usb_xhci_reset();
    if (!(xhci->usbsts & USBSTS_HCH)) {
        DPRINTF("xhci: reset while running!\n");
    }

    xhci->usbcmd = 0;
    xhci->usbsts = USBSTS_HCH;
    xhci->dnctrl = 0;
    xhci->crcr_low = 0;
    xhci->crcr_high = 0;
    xhci->dcbaap_low = 0;
    xhci->dcbaap_high = 0;
    xhci->config = 0;

    for (i = 0; i < xhci->numslots; i++) {
        xhci_disable_slot(xhci, i+1);
    }

    for (i = 0; i < xhci->numports; i++) {
        xhci_port_update(xhci->ports + i, 0);
    }

    for (i = 0; i < xhci->numintrs; i++) {
        xhci->intr[i].iman = 0;
        xhci->intr[i].imod = 0;
        xhci->intr[i].erstsz = 0;
        xhci->intr[i].erstba_low = 0;
        xhci->intr[i].erstba_high = 0;
        xhci->intr[i].erdp_low = 0;
        xhci->intr[i].erdp_high = 0;
        xhci->intr[i].msix_used = 0;

        xhci->intr[i].er_ep_idx = 0;
        xhci->intr[i].er_pcs = 1;
        xhci->intr[i].er_full = 0;
        xhci->intr[i].ev_buffer_put = 0;
        xhci->intr[i].ev_buffer_get = 0;
    }

    xhci->mfindex_start = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
    xhci_mfwrap_update(xhci);
}

The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.