From 62994b2d6beb5f7c59a25bf77e01f191acf74ea2 Mon Sep 17 00:00:00 2001 From: Alex Williamson Date: Sat, 4 Apr 2009 16:40:19 -0700 Subject: [PATCH] virtio_net: Set the mac config only when VIRITO_NET_F_MAC VIRTIO_NET_F_MAC indicates the presence of the mac field in config space, not the validity of the value it contains. Allow the mac to be changed at runtime, but only push the change into config space with the VIRTIO_NET_F_MAC feature present. Signed-off-by: Alex Williamson Acked-by: Christian Borntraeger Signed-off-by: David S. Miller --- drivers/net/virtio_net.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index a6f1e19..9c82a39 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -575,8 +575,9 @@ static int virtnet_set_mac_address(struct net_device *dev, void *p) if (ret) return ret; - vdev->config->set(vdev, offsetof(struct virtio_net_config, mac), - dev->dev_addr, dev->addr_len); + if (virtio_has_feature(vdev, VIRTIO_NET_F_MAC)) + vdev->config->set(vdev, offsetof(struct virtio_net_config, mac), + dev->dev_addr, dev->addr_len); return 0; } @@ -876,11 +877,8 @@ static int virtnet_probe(struct virtio_device *vdev) vdev->config->get(vdev, offsetof(struct virtio_net_config, mac), dev->dev_addr, dev->addr_len); - } else { + } else random_ether_addr(dev->dev_addr); - vdev->config->set(vdev, offsetof(struct virtio_net_config, mac), - dev->dev_addr, dev->addr_len); - } /* Set up our device-specific information */ vi = netdev_priv(dev); -- 2.7.4