SDL_JOYSTICK generates SDL_JOYAXISMOTION events when unplugged

SDL Development
1

Dear SDL users,

I have developped a program to get buttons states and axis values of a USB 2.0 HID compliant “game controller” with SDL joystick. The joystick I use is an APEM IP Desktop.
Everythings is OK but I encounter problems when I plugged or unplugged USB connector. I get some SDL_JOYAXISMOTION events before receiving SDL_JOYDEVICEADDED or SDL_JOYDEVICEREMOVED events.
It is problematic because I use this joystick to drive a motor and I don’t want that motor could turn when I unplugged joystick.

Have you got ideas ?

Thanks a lot

You can see below an example of my program

SDL_Joystick* joystick = nullptr;

if (SDL_Init(SDL_INIT_JOYSTICK) != -1) {
    // autorisation des evenements joystick
    SDL_Event event;
    SDL_JoystickEventState(SDL_ENABLE);

    while(!mExit)
    {
        if (SDL_WaitEventTimeout(&event, 20) == 1) {
            switch (event.type) {
            case SDL_JOYDEVICEADDED:
                OPEN_JOYSTICK()
                qDebug() << "joystick added";
                break;

            case SDL_JOYBUTTONDOWN:
                qDebug() << QString("Bouton : %1 down").arg(event.jbutton.button);
                break;

            case SDL_JOYBUTTONUP:
                qDebug() << QString("Bouton : %1 up").arg(event.jbutton.button);
                break;

            case SDL_JOYAXISMOTION:
                qDebug() << QString("axis n° %1 | value : %2").arg(event.jaxis.axis).arg(event.jaxis.value);                    
                SDL_PumpEvents();
                SDL_FlushEvent(SDL_JOYAXISMOTION);

                break;

            case SDL_JOYDEVICEREMOVED:
                qDebug() << "event.jdevice.which : " << event.jdevice.which;
                if (nullptr != joystick && SDL_JoystickInstanceID(joystick) == event.jdevice.which) {
                    CLOSE_JOYSTICK()
                }

                break;

            default:
                LOG_INFO << tr("Evenement n° %1 non traite").arg(event.type).toStdString();
                break;
            }
        }