From 129bd7ca8ac0b517c85daa8174ae073db7187b06 Mon Sep 17 00:00:00 2001 From: Florian Fainelli Date: Mon, 11 Nov 2019 20:38:46 -0800 Subject: [PATCH] net: dsa: Prevent usage of NET_DSA_TAG_8021Q as tagging protocol It is possible for a switch driver to use NET_DSA_TAG_8021Q as a valid DSA tagging protocol since it registers itself as such, unfortunately since there are not xmit or rcv functions provided, the lack of a xmit() function will lead to a NPD in dsa_slave_xmit() to start with. net/dsa/tag_8021q.c is only comprised of a set of helper functions at the moment, but is not a fully autonomous or functional tagging "driver" (though it could become later on). We do not have any users of NET_DSA_TAG_8021Q so now is a good time to make sure there are not issues being encountered by making this file strictly a place holder for helper functions. Reviewed-by: Vladimir Oltean Signed-off-by: Florian Fainelli Signed-off-by: David S. Miller --- net/dsa/Kconfig | 2 +- net/dsa/tag_8021q.c | 9 --------- 2 files changed, 1 insertion(+), 10 deletions(-) diff --git a/net/dsa/Kconfig b/net/dsa/Kconfig index 29e2bd5cc5af..136612792c08 100644 --- a/net/dsa/Kconfig +++ b/net/dsa/Kconfig @@ -20,7 +20,7 @@ if NET_DSA # tagging formats config NET_DSA_TAG_8021Q - tristate "Tag driver for switches using custom 802.1Q VLAN headers" + tristate select VLAN_8021Q help Unlike the other tagging protocols, the 802.1Q config option simply diff --git a/net/dsa/tag_8021q.c b/net/dsa/tag_8021q.c index bc5cb91bf052..73632d21f1a6 100644 --- a/net/dsa/tag_8021q.c +++ b/net/dsa/tag_8021q.c @@ -341,13 +341,4 @@ struct sk_buff *dsa_8021q_remove_header(struct sk_buff *skb) } EXPORT_SYMBOL_GPL(dsa_8021q_remove_header); -static const struct dsa_device_ops dsa_8021q_netdev_ops = { - .name = "8021q", - .proto = DSA_TAG_PROTO_8021Q, - .overhead = VLAN_HLEN, -}; - MODULE_LICENSE("GPL v2"); -MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_8021Q); - -module_dsa_tag_driver(dsa_8021q_netdev_ops); -- 2.11.0