[Patch] gre tunnels in 2.5/6

[Paul Erkkila <pee@erkkila.org>]

This small patch fixes gre tunnels using keys (and probably 
sequencing/checksums) in 2.{5,6}.
If params aren't set before ipgre_tunnel_init is called, it 
miscalculates the header size, and
stomps on itself when encapsulating packets.

I'm not sure if the later initialization can be removed, or if this is 
the *correct* patch. It does
allow tunnels to work here.

-pee

(this might be a double send, i sent it last sunday, but didn't see it 
show up in the lists)
--- net/ipv4/ip_gre.c.orig	2003-10-26 19:44:26.000000000 +0000
+++ net/ipv4/ip_gre.c	2003-10-26 19:55:33.000000000 +0000
@@ -276,6 +276,8 @@
 	  return NULL;
 
 	dev->init = ipgre_tunnel_init;
+	nt = dev->priv;
+	nt->parms = *parms;
 
 	if (register_netdevice(dev) < 0) {
 		kfree(dev);