QSocketNotifier enabled or disabled from another thread

I know this question has come up before but I can't get ride of the warning

Code:

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QSocketNotifier: Socket notifiers cannot be enabled or disabled from another thread

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I have a button class that monitors a GPIO line and emits a signal when a falling edge is detected. I am using a QSocketNotifier to monitor the gpio dev device. Following is my code in the button class for opening the devices and setting up the QSocketNotifier:

Code:

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void Button::Open()
{
    int retval;
 
    d->m_fd = open(d->m_device.toLatin1().data(), O_RDONLY);
    if (d->m_fd < 0)
    {
        qDebug() << "Failed to open";
        return;
    }
 
    retval = ioctl(d->m_fd, GPIO_GET_LINEEVENT_IOCTL, &d->m_request);
    if (retval < 0)
    {
        qDebug() << "Failed to ioctl";
        close(d->m_fd);
        return;
    }
 
    d->m_notifier_p = new QSocketNotifier(
        d->m_fd, QSocketNotifier::Read, this);
    connect(d->m_notifier_p, &QSocketNotifier::activated,
            this, &Button::OnActivated);
}

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I am then creating the button in another class and moving it to its own thread.

Code:

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Button *btn2_p = new Button(BUTTON_DEVICE, BTN2_LINE, 1);
btn2_p->moveToThread(&m_btn2_thread);
connect(&m_btn2_thread, &QThread::finished, btn2_p, &Button::deleteLater);
connect(&m_btn2_thread, &QThread::started, btn2_p, &Button::Open);
d->m_btn2_thread.start();;

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The button does not have a parent and the open function should be getting called in the m_btn2_thread so the socket notifier is created in the m_btn2_thread.

What did I do wrong in my code to get this error message?