Merge branch 'nfp-fixes-for-v6-1'

Simon Horman says:

====================
nfp: fixes for v6.1

 - Ensure that information displayed by "devlink port show"
           reflects the number of lanes available to be split.
 - Avoid NULL dereference in ethtool test code.
====================

Link: https://lore.kernel.org/r/20221117153744.688595-1-simon.horman@corigine.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/netronome/nfp/nfp_devlink.c

@@ -341,7 +341,7 @@ int nfp_devlink_port_register(struct nfp_app *app, struct nfp_port *port)
 		return ret;
 
 	attrs.split = eth_port.is_split;
-	attrs.splittable = !attrs.split;
+	attrs.splittable = eth_port.port_lanes > 1 && !attrs.split;
 	attrs.lanes = eth_port.port_lanes;
 	attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL;
 	attrs.phys.port_number = eth_port.label_port;

drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c

@@ -1432,6 +1432,9 @@ nfp_port_get_module_info(struct net_device *netdev,
 	u8 data;
 
 	port = nfp_port_from_netdev(netdev);
+	if (!port)
+		return -EOPNOTSUPP;
+
 	/* update port state to get latest interface */
 	set_bit(NFP_PORT_CHANGED, &port->flags);
 	eth_port = nfp_port_get_eth_port(port);