ip_gre: Set needed_headroom dynamically again

ip_gre: Set needed_headroom dynamically again Now that all needed_headroom users have been fixed up so that we can safely increase needed_headroom, this patch restore the dynamic update of needed_headroom. Signed-off-by: Herbert Xu <[email protected]> Signed-off-by: David S. Miller <[email protected]>
kcc · Nov 18, 2011 · 805dc1d · 805dc1d
1 parent 4ce4091
commit 805dc1d
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
@@ -835,6 +835,8 @@ static netdev_tx_t ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev
 	if (skb_headroom(skb) < max_headroom || skb_shared(skb)||
 	    (skb_cloned(skb) && !skb_clone_writable(skb, 0))) {
 		struct sk_buff *new_skb = skb_realloc_headroom(skb, max_headroom);
+		if (max_headroom > dev->needed_headroom)
+			dev->needed_headroom = max_headroom;
 		if (!new_skb) {
 			ip_rt_put(rt);
 			dev->stats.tx_dropped++;