Linux Ethernet Bridging - Sep 2019 - [Bridge] [PATCH net v2] bridge/mdb: remove wrong use of NLM_F_MULTI

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 at cumulusnetworks.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel at 6wind.com>
Acked-by: Nikolay Aleksandrov <nikolay at cumulusnetworks.com>
---

v2:
  add netdev and bridge ml :D
  remove Satish Ashok <sashok at cumulusnetworks.com> (its mail bounces)

 net/bridge/br_mdb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/bridge/br_mdb.c b/net/bridge/br_mdb.c
index bf6acd34234d..63f9c08625f0 100644
--- a/net/bridge/br_mdb.c
+++ b/net/bridge/br_mdb.c
@@ -437,7 +437,7 @@ 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;
 
-- 
2.21.0

From: Nicolas Dichtel <nicolas.dichtel at 6wind.com>
Date: Fri,  6 Sep 2019 11:47:02 +0200
> 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 at cumulusnetworks.com>
> Signed-off-by: Nicolas Dichtel <nicolas.dichtel at 6wind.com>
> Acked-by: Nikolay Aleksandrov <nikolay at cumulusnetworks.com>
Applied and queued up for -stable.