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ipv4: fix multicast losses 

Knut Tidemann found that first packet of a multicast flow was not
correctly received, and bisected the regression to commit b23dd4fe42
(Make output route lookup return rtable directly.)

Special thanks to Knut, who provided a very nice bug report, including
sample programs to demonstrate the bug.

Reported-and-bisectedby: Knut Tidemann <knut.andre.tidemann@jotron.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2011-06-18 11:59:18 -07:00 committed by David S. Miller
parent eeb1497277
commit 9aa3c94ce5
1 changed files with 1 additions and 3 deletions
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4
net/ipv4/route.c
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@ -1902,9 +1902,7 @@ static int ip_route_input_mc(struct sk_buff *skb, __be32 daddr, __be32 saddr,
hash = rt_hash(daddr, saddr, dev->ifindex, rt_genid(dev_net(dev)));
rth = rt_intern_hash(hash, rth, skb, dev->ifindex);
err = 0;
if (IS_ERR(rth))
err = PTR_ERR(rth);
return IS_ERR(rth) ? PTR_ERR(rth) : 0;
e_nobufs:
return -ENOBUFS;