Жесткое зависание при передвижении мыши

static void output_poll_execute(struct work_struct *work)
{
        struct delayed_work *delayed_work = to_delayed_work(work);
        struct drm_device *dev = container_of(delayed_work, struct drm_device, mode_config.output_poll_work);
        struct drm_connector *connector;
        enum drm_connector_status old_status, status;
        bool repoll = false, changed = false;
 
        /* 
           *ИНТЕРЕСНАЯ ВЕЩЬ !!!
        */
        if (!drm_kms_helper_poll)    
                return;
        /* 
           *дальше можно не читать
        */
 
        mutex_lock(&dev->mode_config.mutex);
        list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 
                /* if this is HPD or polled don't check it -
                   TV out for instance */
                if (!connector->polled)
                        continue;
 
                else if (connector->polled & (DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT))
                        repoll = true;
 
                old_status = connector->status;
                /* if we are connected and don't want to poll for disconnect
                   skip it */
                if (old_status == connector_status_connected &&
                    !(connector->polled & DRM_CONNECTOR_POLL_DISCONNECT) &&
                    !(connector->polled & DRM_CONNECTOR_POLL_HPD))
                        continue;
 
                status = connector->funcs->detect(connector, false);
                if (old_status != status)
                        changed = true;
        }
 
        mutex_unlock(&dev->mode_config.mutex);
 
        if (changed) {
                /* send a uevent + call fbdev */
                drm_sysfs_hotplug_event(dev);
                if (dev->mode_config.funcs->output_poll_changed)
                        dev->mode_config.funcs->output_poll_changed(dev);
        }
 
        if (repoll)
                queue_delayed_work(system_nrt_wq, delayed_work, DRM_OUTPUT_POLL_PERIOD);
}

static bool drm_kms_helper_poll = true;
module_param_named(poll, drm_kms_helper_poll, bool, 0600);