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Commit be91c33d authored by Amit Shah's avatar Amit Shah Committed by Rusty Russell
Browse files

virtio: balloon: Move vq initialization into separate function 



The probe and PM restore functions will share this code.

Signed-off-by: default avatarAmit Shah <amit.shah@redhat.com>
Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
parent 0741bcb5

drivers/virtio/virtio_balloon.c

+30 −18
Original line number Diff line number Diff line
@@ -275,32 +275,21 @@ static int balloon(void *_vballoon) 
	return 0;

}



static int virtballoon_probe(struct virtio_device *vdev)

static int init_vqs(struct virtio_balloon *vb)

{

	struct virtio_balloon *vb;

	struct virtqueue *vqs[3];

	vq_callback_t *callbacks[] = { balloon_ack, balloon_ack, stats_request };

	const char *names[] = { "inflate", "deflate", "stats" };

	int err, nvqs;



	vdev->priv = vb = kmalloc(sizeof(*vb), GFP_KERNEL);

	if (!vb) {

		err = -ENOMEM;

		goto out;

	}



	INIT_LIST_HEAD(&vb->pages);

	vb->num_pages = 0;

	init_waitqueue_head(&vb->config_change);

	vb->vdev = vdev;

	vb->need_stats_update = 0;



	/* We expect two virtqueues: inflate and deflate,

	 * and optionally stat. */

	/*

	 * We expect two virtqueues: inflate and deflate, and

	 * optionally stat.

	 */

	nvqs = virtio_has_feature(vb->vdev, VIRTIO_BALLOON_F_STATS_VQ) ? 3 : 2;

	err = vdev->config->find_vqs(vdev, nvqs, vqs, callbacks, names);

	err = vb->vdev->config->find_vqs(vb->vdev, nvqs, vqs, callbacks, names);

	if (err)

		goto out_free_vb;

		return err;



	vb->inflate_vq = vqs[0];

	vb->deflate_vq = vqs[1];
@@ -318,6 +307,29 @@ static int virtballoon_probe(struct virtio_device *vdev) 
			BUG();

		virtqueue_kick(vb->stats_vq);

	}

	return 0;

}



static int virtballoon_probe(struct virtio_device *vdev)

{

	struct virtio_balloon *vb;

	int err;



	vdev->priv = vb = kmalloc(sizeof(*vb), GFP_KERNEL);

	if (!vb) {

		err = -ENOMEM;

		goto out;

	}



	INIT_LIST_HEAD(&vb->pages);

	vb->num_pages = 0;

	init_waitqueue_head(&vb->config_change);

	vb->vdev = vdev;

	vb->need_stats_update = 0;



	err = init_vqs(vb);

	if (err)

		goto out_free_vb;



	vb->thread = kthread_run(balloon, vb, "vballoon");

	if (IS_ERR(vb->thread)) {