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authorVlad Yasevich <vyasevic@redhat.com>2013-04-02 17:10:07 -0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-05-01 09:46:16 -0700
commit54c3688854c2a11f6960579d15a74d1dd7b10706 (patch)
tree4aef8d88096f48f1b07e3b5eb7e73a65df2ead07 /net
parentb30430f11d0da68f0ea9a7aa168df2690da4608c (diff)
net: count hw_addr syncs so that unsync works properly.
[ Upstream commit 4543fbefe6e06a9e40d9f2b28d688393a299f079 ] A few drivers use dev_uc_sync/unsync to synchronize the address lists from master down to slave/lower devices. In some cases (bond/team) a single address list is synched down to multiple devices. At the time of unsync, we have a leak in these lower devices, because "synced" is treated as a boolean and the address will not be unsynced for anything after the first device/call. Treat "synced" as a count (same as refcount) and allow all unsync calls to work. Signed-off-by: Vlad Yasevich <vyasevic@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
-rw-r--r--net/core/dev_addr_lists.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/net/core/dev_addr_lists.c b/net/core/dev_addr_lists.c
index b079c7bbc15..7841d87b86f 100644
--- a/net/core/dev_addr_lists.c
+++ b/net/core/dev_addr_lists.c
@@ -38,7 +38,7 @@ static int __hw_addr_create_ex(struct netdev_hw_addr_list *list,
ha->type = addr_type;
ha->refcount = 1;
ha->global_use = global;
- ha->synced = false;
+ ha->synced = 0;
list_add_tail_rcu(&ha->list, &list->list);
list->count++;
@@ -166,7 +166,7 @@ int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
addr_len, ha->type);
if (err)
break;
- ha->synced = true;
+ ha->synced++;
ha->refcount++;
} else if (ha->refcount == 1) {
__hw_addr_del(to_list, ha->addr, addr_len, ha->type);
@@ -187,7 +187,7 @@ void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
if (ha->synced) {
__hw_addr_del(to_list, ha->addr,
addr_len, ha->type);
- ha->synced = false;
+ ha->synced--;
__hw_addr_del(from_list, ha->addr,
addr_len, ha->type);
}