net: switchdev: fix return code of fdb_dump stub

[ Upstream commit 24cb7055a3066634a0f3fa0cd6a4780652905d35 ]

rtnl_fdb_dump always expects an index to be returned by the ndo_fdb_dump op,
but when CONFIG_NET_SWITCHDEV is off, it returns an error.

Fix that by returning the given unmodified idx.

A similar fix was 0890cf6cb6ab ("switchdev: fix return value of
switchdev_port_fdb_dump in case of error") but for the CONFIG_NET_SWITCHDEV=y
case.

Fixes: 45d4122ca7cd ("switchdev: add support for fdb add/del/dump via switchdev_port_obj ops.")
Signed-off-by: Dragos Tatulea <dragos@endocode.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/include/net/switchdev.h b/include/net/switchdev.h
index d5671f118bfc54566a34d48708e35b69af19b417..0b91979756031ffef5eebadb7467a9997219d8f1 100644 (file)
--- a/include/net/switchdev.h
+++ b/include/net/switchdev.h
@@ -268,7 +268,7 @@ static inline int switchdev_port_fdb_dump(struct sk_buff *skb,
                                          struct net_device *filter_dev,
                                          int idx)
 {
-       return -EOPNOTSUPP;
+       return idx;
 }
 
 #endif