linux-kernel - [PATCH 2/2] net: qrtr: Reset the node and port ID of broadcast messages

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Date:   Wed,  4 Jul 2018 19:49:33 +0530
From:   Arun Kumar Neelakantam <aneela@...eaurora.org>
To:     davem@...emloft.net, bjorn.andersson@...aro.org
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org,
        Arun Kumar Neelakantam <aneela@...eaurora.org>,
        Florian Westphal <fw@...len.de>,
        Hannes Frederic Sowa <hannes@...essinduktion.org>,
        Denys Vlasenko <dvlasenk@...hat.com>,
        Nicolas Dechesne <nicolas.dechesne@...aro.org>
Subject: [PATCH 2/2] net: qrtr: Reset the node and port ID of broadcast messages

All the control messages broadcast to remote routers are using
QRTR_NODE_BCAST instead of using local router NODE ID which cause
the packets to be dropped on remote router due to invalid NODE ID.

Signed-off-by: Arun Kumar Neelakantam <aneela@...eaurora.org>
---
 net/qrtr/qrtr.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/net/qrtr/qrtr.c b/net/qrtr/qrtr.c
index 7ffc9a3..86e1e37 100644
--- a/net/qrtr/qrtr.c
+++ b/net/qrtr/qrtr.c
@@ -191,8 +191,13 @@ static int qrtr_node_enqueue(struct qrtr_node *node, struct sk_buff *skb,
 	hdr->type = cpu_to_le32(type);
 	hdr->src_node_id = cpu_to_le32(from->sq_node);
 	hdr->src_port_id = cpu_to_le32(from->sq_port);
-	hdr->dst_node_id = cpu_to_le32(to->sq_node);
-	hdr->dst_port_id = cpu_to_le32(to->sq_port);
+	if (to->sq_port == QRTR_PORT_CTRL) {
+		hdr->dst_node_id = cpu_to_le32(node->nid);
+		hdr->dst_port_id = cpu_to_le32(QRTR_NODE_BCAST);
+	} else {
+		hdr->dst_node_id = cpu_to_le32(to->sq_node);
+		hdr->dst_port_id = cpu_to_le32(to->sq_port);
+	}
 
 	hdr->size = cpu_to_le32(len);
 	hdr->confirm_rx = 0;
-- 
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