[BRIDGE]: limited ethtool support

Add limited ethtool support to bridge to allow disabling
features.

Note: if underlying device does not support a feature (like checksum
offload), then the bridge device won't inherit it.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 3 deletions

diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
index e6b8bb51d613..11321197338e 100644
--- a/net/bridge/br_if.c
+++ b/net/bridge/br_if.c
@@ -182,6 +182,7 @@ static struct net_device *new_bridge_dev(const char *name)
         br->bridge_id.prio[1] = 0x00;
         memset(br->bridge_id.addr, 0, ETH_ALEN);
 
+        br->feature_mask = dev->features;
         br->stp_enabled = 0;
         br->designated_root = br->bridge_id;
         br->root_path_cost = 0;
@@ -349,9 +350,8 @@ void br_features_recompute(struct net_bridge *br)
         struct net_bridge_port *p;
         unsigned long features, checksum;
 
-        features = NETIF_F_SG | NETIF_F_FRAGLIST 
-                | NETIF_F_HIGHDMA | NETIF_F_TSO;
-        checksum = NETIF_F_IP_CSUM;     /* least commmon subset */
+        features = br->feature_mask &~ NETIF_F_IP_CSUM;
+        checksum = br->feature_mask & NETIF_F_IP_CSUM;
 
         list_for_each_entry(p, &br->port_list, list) {
                 if (!(p->dev->features