[PATCHv2 bluetooth 4/5] ieee802154: 6lowpan: ensure of sending 1280 packets

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This patch changes the 1281 MTU to 1280. Others stack have only a 1280
byte array for uncompressed 6LoWPAN packets, this avoid that these
stacks have an overflow. Sending 1281 uncompressed 6LoWPAN packets isn't
also rfc complaint.

Signed-off-by: Alexander Aring <alex.aring@xxxxxxxxx>
---
 net/ieee802154/6lowpan_rtnl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ieee802154/6lowpan_rtnl.c b/net/ieee802154/6lowpan_rtnl.c
index 71fa7d4..6591d27 100644
--- a/net/ieee802154/6lowpan_rtnl.c
+++ b/net/ieee802154/6lowpan_rtnl.c
@@ -437,7 +437,7 @@ static void lowpan_setup(struct net_device *dev)
 	/* Frame Control + Sequence Number + Address fields + Security Header */
 	dev->hard_header_len	= 2 + 1 + 20 + 14;
 	dev->needed_tailroom	= 2; /* FCS */
-	dev->mtu		= 1281;
+	dev->mtu		= IPV6_MIN_MTU;
 	dev->tx_queue_len	= 0;
 	dev->flags		= IFF_BROADCAST | IFF_MULTICAST;
 	dev->watchdog_timeo	= 0;
-- 
2.0.4

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