static void vduse_dev_reset()

in vdpa_user/vduse_dev.c [405:451]

• 38 lines of code
• 4 McCabe index (conditional complexity)

static void vduse_dev_reset(struct vduse_dev *dev)
{
	int i;
	struct vduse_iova_domain *domain = dev->domain;

	/* The coherent mappings are handled in vduse_dev_free_coherent() */
	if (domain->bounce_map)
		vduse_domain_reset_bounce_map(domain);

	down_write(&dev->rwsem);

	dev->status = 0;
	dev->driver_features = 0;
	dev->generation++;
	spin_lock(&dev->irq_lock);
	dev->config_cb.callback = NULL;
	dev->config_cb.private = NULL;
	spin_unlock(&dev->irq_lock);
	flush_work(&dev->inject);

	for (i = 0; i < dev->vq_num; i++) {
		struct vduse_virtqueue *vq = &dev->vqs[i];

		vq->ready = false;
		vq->desc_addr = 0;
		vq->driver_addr = 0;
		vq->device_addr = 0;
		vq->num = 0;
		memset(&vq->state, 0, sizeof(vq->state));

		spin_lock(&vq->kick_lock);
		vq->kicked = false;
		if (vq->kickfd)
			eventfd_ctx_put(vq->kickfd);
		vq->kickfd = NULL;
		spin_unlock(&vq->kick_lock);

		spin_lock(&vq->irq_lock);
		vq->cb.callback = NULL;
		vq->cb.private = NULL;
		spin_unlock(&vq->irq_lock);
		flush_work(&vq->inject);
		flush_work(&vq->kick);
	}

	up_write(&dev->rwsem);
}