On Mon, Sep 20, 2021 at 11:52:16AM +0200, Horatiu Vultur wrote:
> +static void lan966x_cleanup_ports(struct lan966x *lan966x)
> +{
> + struct lan966x_port *port;
> + int portno;
> +
> + for (portno = 0; portno < lan966x->num_phys_ports; portno++) {
> + port = lan966x->ports[portno];
> + if (!port)
> + continue;
> +
> + if (port->phylink) {
> + rtnl_lock();
> + lan966x_port_stop(port->dev);
> + rtnl_unlock();
> + port->phylink = NULL;
This leaks the phylink structure. You need to call phylink_destroy().
> static int lan966x_probe_port(struct lan966x *lan966x, u8 port,
> phy_interface_t phy_mode)
> {
> struct lan966x_port *lan966x_port;
> + struct phylink *phylink;
> + struct net_device *dev;
> + int err;
>
> if (port >= lan966x->num_phys_ports)
> return -EINVAL;
>
> - lan966x_port = devm_kzalloc(lan966x->dev, sizeof(*lan966x_port),
> - GFP_KERNEL);
> + dev = devm_alloc_etherdev_mqs(lan966x->dev,
> + sizeof(struct lan966x_port), 8, 1);
> + if (!dev)
> + return -ENOMEM;
>
> + SET_NETDEV_DEV(dev, lan966x->dev);
> + lan966x_port = netdev_priv(dev);
> + lan966x_port->dev = dev;
> lan966x_port->lan966x = lan966x;
> lan966x_port->chip_port = port;
> lan966x_port->pvid = PORT_PVID;
> lan966x->ports[port] = lan966x_port;
>
> + dev->max_mtu = ETH_MAX_MTU;
> +
> + dev->netdev_ops = &lan966x_port_netdev_ops;
> + dev->needed_headroom = IFH_LEN * sizeof(u32);
> +
> + err = register_netdev(dev);
> + if (err) {
> + dev_err(lan966x->dev, "register_netdev failed\n");
> + goto err_register_netdev;
> + }
register_netdev() publishes the network device.
> +
> + lan966x_port->phylink_config.dev = &lan966x_port->dev->dev;
> + lan966x_port->phylink_config.type = PHYLINK_NETDEV;
> + lan966x_port->phylink_config.pcs_poll = true;
> +
> + phylink = phylink_create(&lan966x_port->phylink_config,
> + lan966x_port->fwnode,
> + phy_mode,
> + &lan966x_phylink_mac_ops);
phylink_create() should always be called _prior_ to the network device
being published. In any case...
> + if (IS_ERR(phylink))
> + return PTR_ERR(phylink);
If this fails, this function returns an error, but leaves the network
device published - which is a bug in itself.
> +static void lan966x_phylink_mac_link_down(struct phylink_config *config,
> + unsigned int mode,
> + phy_interface_t interface)
> +{
Hmm? Shouldn't this do something?
--
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