linux-imx

    if (dev->config_change_pending)

        __virtio_config_changed(dev);

    dev->config_change_pending = false;

    spin_unlock_irq(&dev->config_lock);

}

EXPORT_SYMBOL_GPL(virtio_config_enable);

​

void virtio_add_status(struct virtio_device *dev, unsigned int status)

{

    dev->config->set_status(dev, dev->config->get_status(dev) | status);

}

EXPORT_SYMBOL_GPL(virtio_add_status);

​

int virtio_finalize_features(struct virtio_device *dev)

{

    int ret = dev->config->finalize_features(dev);

    unsigned status;

​

    if (ret)

        return ret;

​

    if (!virtio_has_feature(dev, VIRTIO_F_VERSION_1))

        return 0;

​

    virtio_add_status(dev, VIRTIO_CONFIG_S_FEATURES_OK);

    status = dev->config->get_status(dev);

    if (!(status & VIRTIO_CONFIG_S_FEATURES_OK)) {

        dev_err(&dev->dev, "virtio: device refuses features: %x\n",