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Message-ID: <1376990505-15708-1-git-send-email-f.fainelli@gmail.com> Date: Tue, 20 Aug 2013 10:21:45 +0100 From: "Florian Fainelli" <f.fainelli@...il.com> To: netdev@...r.kernel.org cc: stephen@...workplumber.org, eric.dumazet@...il.com, vyasevic@...hat.com, davem@...emloft.net, "Florian Fainelli" <f.fainelli@...il.com> Subject: [RFC PATCH] 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@...il.com> --- net/bridge/br_if.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c index aa6c9a8..c41d5fb 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); -- 1.8.1.2 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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