void vring_del_virtqueue()

in virtio_ring.c [2305:2344]

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

void vring_del_virtqueue(struct virtqueue *_vq)
{
	struct vring_virtqueue *vq = to_vvq(_vq);

	spin_lock(&vq->vq.vdev->vqs_list_lock);
	list_del(&_vq->list);
	spin_unlock(&vq->vq.vdev->vqs_list_lock);

	if (vq->we_own_ring) {
		if (vq->packed_ring) {
			vring_free_queue(vq->vq.vdev,
					 vq->packed.ring_size_in_bytes,
					 vq->packed.vring.desc,
					 vq->packed.ring_dma_addr);

			vring_free_queue(vq->vq.vdev,
					 vq->packed.event_size_in_bytes,
					 vq->packed.vring.driver,
					 vq->packed.driver_event_dma_addr);

			vring_free_queue(vq->vq.vdev,
					 vq->packed.event_size_in_bytes,
					 vq->packed.vring.device,
					 vq->packed.device_event_dma_addr);

			kfree(vq->packed.desc_state);
			kfree(vq->packed.desc_extra);
		} else {
			vring_free_queue(vq->vq.vdev,
					 vq->split.queue_size_in_bytes,
					 vq->split.vring.desc,
					 vq->split.queue_dma_addr);
		}
	}
	if (!vq->packed_ring) {
		kfree(vq->split.desc_state);
		kfree(vq->split.desc_extra);
	}
	kfree(vq);
}