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bridge: Fix return values of br_multicast_add_group/br_multicast_new_group 

If br_multicast_new_group returns NULL, we would return 0 (no error) to
the caller of br_multicast_add_group, which is not what we want. Instead
br_multicast_new_group should return ERR_PTR(-ENOMEM) in this case.
Also propagate the error number returned by br_mdb_rehash properly.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tobias Klauser 2010-12-10 03:18:04 +00:00 committed by David S. Miller
parent eaa7dcde1d
commit 4c0833bcd4
1 changed files with 6 additions and 4 deletions
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10
net/bridge/br_multicast.c
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@ -654,11 +654,13 @@ static struct net_bridge_mdb_entry *br_multicast_new_group(
struct net_bridge_mdb_htable *mdb;
struct net_bridge_mdb_entry *mp;
int hash;
int err;
mdb = rcu_dereference_protected(br->mdb, 1);
if (!mdb) {
if (br_mdb_rehash(&br->mdb, BR_HASH_SIZE, 0))
return NULL;
err = br_mdb_rehash(&br->mdb, BR_HASH_SIZE, 0);
if (err)
return ERR_PTR(err);
goto rehash;
}
@ -680,7 +682,7 @@ static struct net_bridge_mdb_entry *br_multicast_new_group(
mp = kzalloc(sizeof(*mp), GFP_ATOMIC);
if (unlikely(!mp))
goto out;
return ERR_PTR(-ENOMEM);
mp->br = br;
mp->addr = *group;
@ -713,7 +715,7 @@ static int br_multicast_add_group(struct net_bridge *br,
mp = br_multicast_new_group(br, port, group);
err = PTR_ERR(mp);
if (unlikely(IS_ERR(mp) || !mp))
if (IS_ERR(mp))
goto err;
if (!port) {