batman-adv: Set the txqueuelen to zero when creating soft interface

Like other virtual interfaces, e.g. br0, we don't need a transmit
queue. Packets should only be queued on real interfaces which are
underneath. In practice this patch makes little difference since the
virtual interfaces can accept packets as fast as they come, but the
patch will avoid bufferbloat questions to the mailling lists in the
future.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Linus Lüssing <linus.luessing@web.de>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Sven Eckelmann <sven@narfation.org>

diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c
index ad6da4c7ddb524baaf50d6eda1e2c5db64b99322..58ce4400d5817ed674dc9c95c81476603f510da0 100644 (file)
--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@ -584,6 +584,7 @@ static void interface_setup(struct net_device *dev)
        dev->hard_start_xmit = interface_tx;
 #endif
        dev->destructor = free_netdev;
+       dev->tx_queue_len = 0;
 
        /**
         * can't call min_mtu, because the needed variables