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Commit d45b897b authored by Michael S. Tsirkin's avatar Michael S. Tsirkin
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virtio_net: allow specifying context for rx 



With mergeable buffers we never use s/g for rx,
so allow specifying context in that case.

Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent 5a08b04f

drivers/net/virtio_net.c

+14 −1
Original line number Diff line number Diff line
@@ -2044,6 +2044,7 @@ static int virtnet_find_vqs(struct virtnet_info *vi) 
	int ret = -ENOMEM;

	int i, total_vqs;

	const char **names;

	bool *ctx;



	/* We expect 1 RX virtqueue followed by 1 TX virtqueue, followed by

	 * possible N-1 RX/TX queue pairs used in multiqueue mode, followed by
@@ -2062,6 +2063,13 @@ static int virtnet_find_vqs(struct virtnet_info *vi) 
	names = kmalloc(total_vqs * sizeof(*names), GFP_KERNEL);

	if (!names)

		goto err_names;

	if (vi->mergeable_rx_bufs) {

		ctx = kzalloc(total_vqs * sizeof(*ctx), GFP_KERNEL);

		if (!ctx)

			goto err_ctx;

	} else {

		ctx = NULL;

	}



	/* Parameters for control virtqueue, if any */

	if (vi->has_cvq) {
@@ -2077,9 +2085,12 @@ static int virtnet_find_vqs(struct virtnet_info *vi) 
		sprintf(vi->sq[i].name, "output.%d", i);

		names[rxq2vq(i)] = vi->rq[i].name;

		names[txq2vq(i)] = vi->sq[i].name;

		if (ctx)

			ctx[rxq2vq(i)] = true;

	}



	ret = virtio_find_vqs(vi->vdev, total_vqs, vqs, callbacks, names, NULL);

	ret = vi->vdev->config->find_vqs(vi->vdev, total_vqs, vqs, callbacks,

					 names, ctx, NULL);

	if (ret)

		goto err_find;
@@ -2101,6 +2112,8 @@ static int virtnet_find_vqs(struct virtnet_info *vi) 
	return 0;



err_find:

	kfree(ctx);

err_ctx:

	kfree(names);

err_names:

	kfree(callbacks);