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, 4 insertions, 0 deletions

diff --git a/net/dsa/Kconfig b/net/dsa/Kconfig
index 79bcd76d3f10..505aa14e67fc 100644
--- a/net/dsa/Kconfig
+++ b/net/dsa/Kconfig
@@ -18,6 +18,10 @@ config NET_DSA_TAG_EDSA
         bool
         default n
 
+config NET_DSA_TAG_TRAILER
+        bool
+        default n
+
 
 # switch drivers
 config NET_DSA_MV88E6XXX