[PATCH 4.9 068/125] net: qrtr: send msgs from local of same id as broadcast

[Greg Kroah-Hartman]

From: Wang Wenhu <wenhu.wang@xxxxxxxx>

[ Upstream commit 6dbf02acef69b0742c238574583b3068afbd227c ]

If the local node id(qrtr_local_nid) is not modified after its
initialization, it equals to the broadcast node id(QRTR_NODE_BCAST).
So the messages from local node should not be taken as broadcast
and keep the process going to send them out anyway.

The definitions are as follow:
static unsigned int qrtr_local_nid = NUMA_NO_NODE;

Fixes: fdf5fd397566 ("net: qrtr: Broadcast messages only from control port")
Signed-off-by: Wang Wenhu <wenhu.wang@xxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 net/qrtr/qrtr.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

--- a/net/qrtr/qrtr.c
+++ b/net/qrtr/qrtr.c
@@ -621,20 +621,21 @@ static int qrtr_sendmsg(struct socket *s
 
 	node = NULL;
 	if (addr->sq_node == QRTR_NODE_BCAST) {
-		enqueue_fn = qrtr_bcast_enqueue;
-		if (addr->sq_port != QRTR_PORT_CTRL) {
+		if (addr->sq_port != QRTR_PORT_CTRL &&
+		    qrtr_local_nid != QRTR_NODE_BCAST) {
 			release_sock(sk);
 			return -ENOTCONN;
 		}
+		enqueue_fn = qrtr_bcast_enqueue;
 	} else if (addr->sq_node == ipc->us.sq_node) {
 		enqueue_fn = qrtr_local_enqueue;
 	} else {
-		enqueue_fn = qrtr_node_enqueue;
 		node = qrtr_node_lookup(addr->sq_node);
 		if (!node) {
 			release_sock(sk);
 			return -ECONNRESET;
 		}
+		enqueue_fn = qrtr_node_enqueue;
 	}
 
 	plen = (len + 3) & ~3;