dsa: Combine core and tagging code

These files have circular dependencies, so if we make DSA modular then
they must be built into the same module.  Therefore, link them
together and merge their respective module init and exit functions.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
index fc93088..88e7c2f 100644
--- a/net/dsa/dsa.c
+++ b/net/dsa/dsa.c
@@ -398,12 +398,36 @@
 
 static int __init dsa_init_module(void)
 {
-	return platform_driver_register(&dsa_driver);
+	int rc;
+
+	rc = platform_driver_register(&dsa_driver);
+	if (rc)
+		return rc;
+
+#ifdef CONFIG_NET_DSA_TAG_DSA
+	dev_add_pack(&dsa_packet_type);
+#endif
+#ifdef CONFIG_NET_DSA_TAG_EDSA
+	dev_add_pack(&edsa_packet_type);
+#endif
+#ifdef CONFIG_NET_DSA_TAG_TRAILER
+	dev_add_pack(&trailer_packet_type);
+#endif
+	return 0;
 }
 module_init(dsa_init_module);
 
 static void __exit dsa_cleanup_module(void)
 {
+#ifdef CONFIG_NET_DSA_TAG_TRAILER
+	dev_remove_pack(&trailer_packet_type);
+#endif
+#ifdef CONFIG_NET_DSA_TAG_EDSA
+	dev_remove_pack(&edsa_packet_type);
+#endif
+#ifdef CONFIG_NET_DSA_TAG_DSA
+	dev_remove_pack(&dsa_packet_type);
+#endif
 	platform_driver_unregister(&dsa_driver);
 }
 module_exit(dsa_cleanup_module);