dsa: do not support ndo_get_phys_port_name for non-legacy ports

Since each non-legacy slave has its own devlink port instance
correctly set, rely on devlink core to generate correct phys port name.

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 d1a0a656b6b5..80be8e86c82d 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -736,6 +736,13 @@ static int dsa_slave_get_phys_port_name(struct net_device *dev,
 {
         struct dsa_port *dp = dsa_slave_to_port(dev);
 
+        /* 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;
+
         if (snprintf(name, len, "p%d", dp->index) >= len)
                 return -EINVAL;