1 files changed, 39 insertions, 0 deletions
diff --git a/target/linux/mediatek/patches-4.9/0040-net-next-tag_mtk-add-flow_dissect-callback-to-the-op.patch b/target/linux/mediatek/patches-4.9/0040-net-next-tag_mtk-add-flow_dissect-callback-to-the-op.patch
new file mode 100644
index 0000000000..da98a21380
--- /dev/null
+++ b/target/linux/mediatek/patches-4.9/0040-net-next-tag_mtk-add-flow_dissect-callback-to-the-op.patch
@@ -0,0 +1,39 @@
+From 9d6806e16e5ea68a49225da1ab065ef0b5d7704b Mon Sep 17 00:00:00 2001
+From: John Crispin <john@phrozen.org>
+Date: Mon, 7 Aug 2017 16:55:56 +0200
+Subject: [PATCH 40/57] net-next: tag_mtk: add flow_dissect callback to the ops
+ struct
+
+The MT7530 inserts the 4 magic header in between the 802.3 address and
+protocol field. The patch implements the callback that can be called by
+the flow dissector to figure out the real protocol and offset of the
+network header. With this patch applied we can properly parse the packet
+and thus make hashing function properly.
+
+Signed-off-by: John Crispin <john@phrozen.org>
+---
+ net/dsa/tag_mtk.c | 14 ++++++++++++--
+ 1 file changed, 12 insertions(+), 2 deletions(-)
+
+--- a/net/dsa/tag_mtk.c
++++ b/net/dsa/tag_mtk.c
+@@ -111,7 +111,17 @@ out:
+ 	return 0;
+ }
+ 
++static int mtk_tag_flow_dissect(const struct sk_buff *skb, __be16 *proto,
++				int *offset)
++{
++	*offset = 4;
++	*proto = ((__be16 *)skb->data)[1];
++
++	return 0;
++}
++
+ const struct dsa_device_ops mtk_netdev_ops = {
+-	.xmit	= mtk_tag_xmit,
+-	.rcv	= mtk_tag_rcv,
++	.xmit		= mtk_tag_xmit,
++	.rcv		= mtk_tag_rcv,
++	.flow_dissect	= mtk_tag_flow_dissect,
+ };