void vp_del_vqs()

in virtio_pci_common.c [260:311]

• 42 lines of code
• 9 McCabe index (conditional complexity)

void vp_del_vqs(struct virtio_device *vdev)
{
	struct virtio_pci_device *vp_dev = to_vp_device(vdev);
	struct virtqueue *vq, *n;
	int i;

	list_for_each_entry_safe(vq, n, &vdev->vqs, list) {
		if (vp_dev->per_vq_vectors) {
			int v = vp_dev->vqs[vq->index]->msix_vector;

			if (v != VIRTIO_MSI_NO_VECTOR) {
				int irq = pci_irq_vector(vp_dev->pci_dev, v);

				irq_set_affinity_hint(irq, NULL);
				free_irq(irq, vq);
			}
		}
		vp_del_vq(vq);
	}
	vp_dev->per_vq_vectors = false;

	if (vp_dev->intx_enabled) {
		free_irq(vp_dev->pci_dev->irq, vp_dev);
		vp_dev->intx_enabled = 0;
	}

	for (i = 0; i < vp_dev->msix_used_vectors; ++i)
		free_irq(pci_irq_vector(vp_dev->pci_dev, i), vp_dev);

	if (vp_dev->msix_affinity_masks) {
		for (i = 0; i < vp_dev->msix_vectors; i++)
			if (vp_dev->msix_affinity_masks[i])
				free_cpumask_var(vp_dev->msix_affinity_masks[i]);
	}

	if (vp_dev->msix_enabled) {
		/* Disable the vector used for configuration */
		vp_dev->config_vector(vp_dev, VIRTIO_MSI_NO_VECTOR);

		pci_free_irq_vectors(vp_dev->pci_dev);
		vp_dev->msix_enabled = 0;
	}

	vp_dev->msix_vectors = 0;
	vp_dev->msix_used_vectors = 0;
	kfree(vp_dev->msix_names);
	vp_dev->msix_names = NULL;
	kfree(vp_dev->msix_affinity_masks);
	vp_dev->msix_affinity_masks = NULL;
	kfree(vp_dev->vqs);
	vp_dev->vqs = NULL;
}