xen: netfront: assume all hw features are available until backend connection setup

We need to assume that all features will be available when registering the
netdev otherwise they are ommitted from the initial set of
dev->wanted_features. When we connect to the backed we reduce the set as
necessary due to the call to netdev_update_features() in xennet_connect().

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c
index 0cfe4ccf92d2..db9a763aaa7f 100644
--- a/drivers/net/xen-netfront.c
+++ b/drivers/net/xen-netfront.c
@@ -1251,6 +1251,14 @@ static struct net_device * __devinit xennet_create_dev(struct xenbus_device *dev
                                   NETIF_F_GSO_ROBUST;
         netdev->hw_features     = NETIF_F_IP_CSUM | NETIF_F_SG | NETIF_F_TSO;
 
+        /*
+         * Assume that all hw features are available for now. This set
+         * will be adjusted by the call to netdev_update_features() in
+         * xennet_connect() which is the earliest point where we can
+         * negotiate with the backend regarding supported features.
+         */
+        netdev->features |= netdev->hw_features;
+
         SET_ETHTOOL_OPS(netdev, &xennet_ethtool_ops);
         SET_NETDEV_DEV(netdev, &dev->dev);