[PATCHv2 net-next 4/5] net: bridge: use common function to compute the features

[Hangbin Liu]

Previously, bridge ignored all features propagation and DST retention,
only handling explicitly the GSO limits.

By switching to the new helper netdev_compute_features_from_lowers(),
the bridge now expose additional features, depending on the lowers
capabilities.

Since br_set_gso_limits() is already covered by the helper, it can be
removed safely.

Signed-off-by: Hangbin Liu <liuhang...@gmail.com>
---
 net/bridge/br_if.c | 22 +++-------------------
 1 file changed, 3 insertions(+), 19 deletions(-)

diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
index 98c5b9c3145f..8fe44e8c008c 100644
--- a/net/bridge/br_if.c
+++ b/net/bridge/br_if.c
@@ -525,20 +525,6 @@ void br_mtu_auto_adjust(struct net_bridge *br)
        br_opt_toggle(br, BROPT_MTU_SET_BY_USER, false);
 }
 
-static void br_set_gso_limits(struct net_bridge *br)
-{
-       unsigned int tso_max_size = TSO_MAX_SIZE;
-       const struct net_bridge_port *p;
-       u16 tso_max_segs = TSO_MAX_SEGS;
-
-       list_for_each_entry(p, &br->port_list, list) {
-               tso_max_size = min(tso_max_size, p->dev->tso_max_size);
-               tso_max_segs = min(tso_max_segs, p->dev->tso_max_segs);
-       }
-       netif_set_tso_max_size(br->dev, tso_max_size);
-       netif_set_tso_max_segs(br->dev, tso_max_segs);
-}
-
 /*
  * Recomputes features using slave's features
  */
@@ -652,8 +638,6 @@ int br_add_if(struct net_bridge *br, struct net_device *dev,
                        netdev_err(dev, "failed to sync bridge static fdb 
addresses to this port\n");
        }
 
-       netdev_update_features(br->dev);
-
        br_hr = br->dev->needed_headroom;
        dev_hr = netdev_get_fwd_headroom(dev);
        if (br_hr < dev_hr)
@@ -694,7 +678,8 @@ int br_add_if(struct net_bridge *br, struct net_device *dev,
                call_netdevice_notifiers(NETDEV_CHANGEADDR, br->dev);
 
        br_mtu_auto_adjust(br);
-       br_set_gso_limits(br);
+
+       netdev_compute_features_from_lowers(br->dev);
 
        kobject_uevent(&p->kobj, KOBJ_ADD);
 
@@ -740,7 +725,6 @@ int br_del_if(struct net_bridge *br, struct net_device *dev)
        del_nbp(p);
 
        br_mtu_auto_adjust(br);
-       br_set_gso_limits(br);
 
        spin_lock_bh(&br->lock);
        changed_addr = br_stp_recalculate_bridge_id(br);
@@ -749,7 +733,7 @@ int br_del_if(struct net_bridge *br, struct net_device *dev)
        if (changed_addr)
                call_netdevice_notifiers(NETDEV_CHANGEADDR, br->dev);
 
-       netdev_update_features(br->dev);
+       netdev_compute_features_from_lowers(br->dev);
 
        return 0;
 }
-- 
2.50.1