dsa: add support for Trailer tagging format

This adds support for the Trailer switch tagging format.  This is
another tagging that doesn't explicitly mark tagged packets with a
distinct ethertype, so that we need to add a similar hack in the
receive path as for the Original DSA tagging format.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Tested-by: Byron Bradley <byron.bbradley@gmail.com>
Tested-by: Tim Ellis <tim.ellis@mac.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 0 deletions

diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 8f8868dd4302..37616884b8a9 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -249,6 +249,11 @@ dsa_slave_create(struct dsa_switch *ds, struct device *parent,
                 slave_dev->hard_start_xmit = edsa_xmit;
                 break;
 #endif
+#ifdef CONFIG_NET_DSA_TAG_TRAILER
+        case htons(ETH_P_TRAILER):
+                slave_dev->hard_start_xmit = trailer_xmit;
+                break;
+#endif
         default:
                 BUG();
         }