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authorFlorian Fainelli <f.fainelli@gmail.com>2013-08-27 12:03:53 +0100
committerDavid S. Miller <davem@davemloft.net>2013-08-29 15:17:09 -0400
commitfd094808a06e290432fc13c09aae808aea34d2ca (patch)
tree090bce6a1c8c17c703c8cd7633e818c648f5033e /net/bridge
parent76bfd8984430be5b19727d09f6ab5e1d7a247f8c (diff)
bridge: inherit slave devices needed_headroom
Some slave devices may have set a dev->needed_headroom value which is different than the default one, most likely in order to prepend a hardware descriptor in front of the Ethernet frame to send. Whenever a new slave is added to a bridge, ensure that we update the needed_headroom value accordingly to account for the slave needed_headroom value. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/bridge')
-rw-r--r--net/bridge/br_if.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
index aa6c9a8ba32..c41d5fbb91d 100644
--- a/net/bridge/br_if.c
+++ b/net/bridge/br_if.c
@@ -383,6 +383,9 @@ int br_add_if(struct net_bridge *br, struct net_device *dev)
netdev_update_features(br->dev);
+ if (br->dev->needed_headroom < dev->needed_headroom)
+ br->dev->needed_headroom = dev->needed_headroom;
+
spin_lock_bh(&br->lock);
changed_addr = br_stp_recalculate_bridge_id(br);