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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Sabrina Dubroca , Jiri Pirko , Simon Horman , Ido Schimmel , Shuah Khan , Stanislav Fomichev , Stanislav Fomichev , Kuniyuki Iwashima , Ahmed Zaki , Alexander Lobakin , bridge@lists.linux.dev, linux-kselftest@vger.kernel.org, Hangbin Liu Subject: [PATCHv4 net-next 4/4] net: bridge: use common function to compute the features Date: Tue, 14 Oct 2025 08:02:17 +0000 Message-ID: <20251014080217.47988-5-liuhangbin@gmail.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20251014080217.47988-1-liuhangbin@gmail.com> References: <20251014080217.47988-1-liuhangbin@gmail.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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. Bridge has it's own way to update needed_headroom. So we don't need to update it in the helper. Signed-off-by: Hangbin Liu --- 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..d614378245f8 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, false); 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, false); return 0; } -- 2.50.1