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ipv4 : igmp : fix error handle in ip_mc_add_src() 

When add sources to interface failure, need to roll back the sfcount[MODE]
to before state. We need to match it corresponding.

Acked-by: David L Stevens <dlstevens@us.ibm.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Jun Zhao <mypopydev@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jun Zhao 2011-11-22 17:19:03 +00:00 committed by David S. Miller
parent 4d0fe50c75
commit 685f94e6db
1 changed files with 2 additions and 1 deletions
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3
net/ipv4/igmp.c
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@ -1716,7 +1716,8 @@ static int ip_mc_add_src(struct in_device *in_dev, __be32 *pmca, int sfmode,
if (err) {
int j;
pmc->sfcount[sfmode]--;
if (!delta)
pmc->sfcount[sfmode]--;
for (j=0; j<i; j++)
(void) ip_mc_del1_src(pmc, sfmode, &psfsrc[j]);
} else if (isexclude != (pmc->sfcount[MCAST_EXCLUDE] != 0)) {