dsa: pass switch ID through devlink_port_attrs_set()

Pass the switch ID down the to devlink through devlink_port_attrs_set()
so it can be used by devlink_compat_switch_id_get(). Leave
ndo_get_port_parent_id implementation only for legacy.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 0 deletions

diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index f83525909c57..ce26dddc8270 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -379,6 +379,13 @@ static int dsa_slave_get_port_parent_id(struct net_device *dev,
         struct dsa_switch *ds = dp->ds;
         struct dsa_switch_tree *dst = ds->dst;
 
+        /* For non-legacy ports, devlink is used and it takes
+         * care of the name generation. This ndo implementation
+         * should be removed with legacy support.
+         */
+        if (dp->ds->devlink)
+                return -EOPNOTSUPP;
+
         ppid->id_len = sizeof(dst->index);
         memcpy(&ppid->id, &dst->index, ppid->id_len);