[PATCH 5/8] virtio_net: add request_vqs/free_vqs calls

Michael S. Tsirkin
2009-04-27T12:34:48Z

Add request_vqs/free_vqs calls to virtio_net.
These will be required for MSI support.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
drivers/net/virtio_net.c | 16 +++++++++++++---
1 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 9c82a39..fbe8a70 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -841,6 +841,7 @@ static int virtnet_probe(struct virtio_device *vdev)
int err;
struct net_device *dev;
struct virtnet_info *vi;
+ bool control_vq;

/* Allocate ourselves a network device with room for our info */
dev = alloc_etherdev(sizeof(struct virtnet_info));
@@ -901,11 +902,17 @@ static int virtnet_probe(struct virtio_device *vdev)
if (virtio_has_feature(vdev, VIRTIO_NET_F_MRG_RXBUF))
vi->mergeable_rx_bufs = true;

- /* We expect two virtqueues, receive then send. */
+ /* We expect either two or three virtqueues: receive, send and
+ * optionally control. */
+ control_vq = virtio_has_feature(vi->vdev, VIRTIO_NET_F_CTRL_VQ);
+ err = virtio_request_vqs(vdev, control_vq ? 3 : 2);
+ if (err)
+ goto free;
+
vi->rvq = vdev->config->find_vq(vdev, 0, skb_recv_done);
if (IS_ERR(vi->rvq)) {
err = PTR_ERR(vi->rvq);
- goto free;
+ goto free_vqs;
}

vi->svq = vdev->config->find_vq(vdev, 1, skb_xmit_done);
@@ -914,7 +921,7 @@ static int virtnet_probe(struct virtio_device *vdev)
goto free_recv;
}

- if (virtio_has_feature(vi->vdev, VIRTIO_NET_F_CTRL_VQ)) {
+ if (control_vq) {
vi->cvq = vdev->config->find_vq(vdev, 2, NULL);
if (IS_ERR(vi->cvq)) {
err = PTR_ERR(vi->svq);
@@ -965,6 +972,8 @@ free_send:
vdev->config->del_vq(vi->svq);
free_recv:
vdev->config->del_vq(vi->rvq);
+free_vqs:
+ virtio_free_vqs(vi->vdev);
free:
free_netdev(dev);
return err;
@@ -994,6 +1003,7 @@ static void virtnet_remove(struct virtio_device *vdev)
vdev->config->del_vq(vi->rvq);
if (virtio_has_feature(vi->vdev, VIRTIO_NET_F_CTRL_VQ))
vdev->config->del_vq(vi->cvq);
+ virtio_free_vqs(vi->vdev);
unregister_netdev(vi->dev);

while (vi->pages)
--
1.6.0.6