Commit 7e93a02f authored Nov 26, 2014 by Michael S. Tsirkin

virtio_net: disable mac write for virtio 1.0



The spec states that mac in config space is only driver-writable in the
legacy case.  Fence writing it in virtnet_set_mac_address() in the
virtio 1.0 case.

Suggested-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>

parent d04302b3

drivers/net/virtio_net.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -1030,7 +1030,8 @@ static int virtnet_set_mac_address(struct net_device dev, void p)
		"Failed to set mac address by vq command.\n");
		return -EINVAL;
		}
		} else if (virtio_has_feature(vdev, VIRTIO_NET_F_MAC)) {
		} else if (virtio_has_feature(vdev, VIRTIO_NET_F_MAC) &&
		!virtio_has_feature(vdev, VIRTIO_F_VERSION_1)) {
		unsigned int i;

		/* Naturally, this has an atomicity problem. */