+https://source.codeaurora.org/quic/la/platform/vendor/qcom-opensource/\
+dataservices/tree/rmnetctl

Don't split URL better to have long line.
diff --git a/drivers/net/rmnet/Kconfig b/drivers/net/rmnet/Kconfig

Since this is Qualcomm and Ethernet specific, maybe better to put
in drivers/net/ethernet/qualcom/rmnet

+config RMNET_DEBUG

Please use network device standard debug mechanism.
netif_msg_XXX

+               buffloc += snprintf(&buffer[buffloc], sizeof(buffer) - buffloc,
+                                       " %02x", skb->data[i]);

If you really have to do this. Use hex_dump_bytes API.

+       skb->mac_header = 0;
+       skb->mac_len = 0;
+}

Why not use sbk_set_mac_header(skb, 0)?

+static inline struct rmnet_phys_ep_conf_s *_rmnet_get_phys_ep_config
+                                               (struct net_device *dev)
awkward line break.
dev could be const

+       config = (struct rmnet_phys_ep_conf_s *)
+                 rcu_dereference(dev->rx_handler_data);

Please don't directly reference rx_handler. There is already functions
like netdev_is_rx_handler_busy() to abstract that API.

+ * @epconfig:    endpoint configuration structure to set
+ */

You are using docbook format here, but this is not a docbook comment.
ie.
/**
 * function - This is a docbook comment
 * @dev: this is a param
 */

Plus these are static functions so there is no point in documentating
internal API with docbook.

+       ASSERT_RTNL();
+
+       if (!dev || config_id < RMNET_LOCAL_LOGICAL_ENDPOINT ||
+           config_id >= RMNET_MAX_LOGICAL_EP)
+               return -EINVAL;

For internal API's you should validate parmeters at the external
entry point not in each call. Otherwise you have a multitude of
impossible error checks and dead code paths.

+       .next = 0,
+       .priority = 0
+};
Don't initialize fields that are not used or should be zero.


Hi Stephen

I'll make these changes.


Could just be:

static inline int _rmnet_is_physical_endpoint_associated(const struct
net_device *dev)
{
        rx_handler_func_t *rx_handler
                = rcu_dereference(dev->rx_handler);

        return rx_handler == rmet_rx_handler;
}

But standard practice is to use ndo_ops to identify self in network drivers.
I.e
        return dev->netdev_ops == &rmnet_device_ops;


The netdevice which is associated is the physical (real_dev). This device can vary based on hardware and will have its own netdev_ops associated with it.
rmnet_device_ops applies to the rmnet devices only. I'll use the first
option you have suggested.

+       if (!data[IFLA_RMNET_MUX_ID])
+               return -EINVAL;

So you are inventing private link netlink attributes.
Why? Why can't you use device switch, bridge, or other master/slave model.


I would like to eventually add more configuration options for the
ingress & egress data formats as well as the endpoint configuration
(VND mode vs BRIDGE mode). I was able to re-use IFLA_VLAN_ID for
IFLA_RMNET_MUX_ID and test but it wasn't sufficient for the additional
parameters. I'll check the bridge attributes and try to reuse it.

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