Commit e937f583 authored Apr 03, 2013 by Alan Ott Committed by David S. Miller Apr 07, 2013

mac802154: Increase tx_buffer_len



Increase the buffer length from 10 to 300 packets. Consider that traffic on
mac802154 devices will often be 6LoWPAN, and a full-length (1280 octet)
IPv6 packet will fragment into 15 6LoWPAN fragments (because the MTU of
IEEE 802.15.4 is 127).  A 300-packet queue is really 20 full-length IPv6
packets.

With a queue length of 10, an entire IPv6 packet was unable to get queued
at one time, causing fragments to be dropped, and making reassembly
impossible.

Signed-off-by: Alan Ott <alan@signal11.us>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent b5992fe9

net/mac802154/wpan.c

+1 −1

Original line number	Original line	Diff line number	Diff line
	@@ -360,7 +360,7 @@ void mac802154_wpan_setup(struct net_device *dev)
	dev->header_ops = &mac802154_header_ops;		dev->header_ops = &mac802154_header_ops;
	dev->needed_tailroom = 2; /* FCS */		dev->needed_tailroom = 2; /* FCS */
	dev->mtu = IEEE802154_MTU;		dev->mtu = IEEE802154_MTU;
	dev->tx_queue_len = 10;		dev->tx_queue_len = 300;
	dev->type = ARPHRD_IEEE802154;		dev->type = ARPHRD_IEEE802154;
	dev->flags = IFF_NOARP \| IFF_BROADCAST;		dev->flags = IFF_NOARP \| IFF_BROADCAST;
	dev->watchdog_timeo = 0;		dev->watchdog_timeo = 0;