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gro: fix aggregation for skb using frag_list

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In commit 8a29111c7c ("net: gro: allow to build full sized skb")
I added a regression for linear skb that traditionally force GRO
to use the frag_list fallback.

Erez Shitrit found that at most two segments were aggregated and
the "if (skb_gro_len(p) != pinfo->gso_size)" test was failing.

This is because pinfo at this spot still points to the last skb in the
chain, instead of the first one, where we find the correct gso_size
information.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Fixes: 8a29111c7c ("net: gro: allow to build full sized skb")
Reported-by: Erez Shitrit <erezsh@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2014-09-29 10:34:29 -07:00 committed by David S. Miller
parent 2c1a4311b6
commit 73d3fe6d1c
1 changed files with 3 additions and 0 deletions
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3
net/core/skbuff.c
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@ -3152,6 +3152,9 @@ int skb_gro_receive(struct sk_buff **head, struct sk_buff *skb)
NAPI_GRO_CB(skb)->free = NAPI_GRO_FREE_STOLEN_HEAD;
goto done;
}
/* switch back to head shinfo */
pinfo = skb_shinfo(p);
if (pinfo->frag_list)
goto merge;
if (skb_gro_len(p) != pinfo->gso_size)