bridge/mdb: remove wrong use of NLM_F_MULTI

BugLink: https://bugs.launchpad.net/bugs/1845266
[ Upstream commit 94a72b3f024fc7e9ab640897a1e38583a470659d ]

NLM_F_MULTI must be used only when a NLMSG_DONE message is sent at the end.
In fact, NLMSG_DONE is sent only at the end of a dump.

Libraries like libnl will wait forever for NLMSG_DONE.

Fixes: 949f1e39a617 ("bridge: mdb: notify on router port add and del")
CC: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>

diff --git a/net/bridge/br_mdb.c b/net/bridge/br_mdb.c
index b0f4c734900bc3ac1ee15f967665e8ce3526e1ed..32f3eda4c704e6b34abf103f0e6ec9720bf52aeb 100644 (file)
--- a/net/bridge/br_mdb.c
+++ b/net/bridge/br_mdb.c
@@ -419,7 +419,7 @@ static int nlmsg_populate_rtr_fill(struct sk_buff *skb,
        struct nlmsghdr *nlh;
        struct nlattr *nest;
 
-       nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), NLM_F_MULTI);
+       nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), 0);
        if (!nlh)
                return -EMSGSIZE;