[RFC] libertas: first stab at cfg80211 support

[Holger Schurig]

> This seems wrong -- doesn't libertas have multiple netdevs?
> You're treating wdev == wiphy it seems here, rather than wdev
> == netdev. 

Yes, it has three netdevs, but they aren't all setup at 
card-initialization time.


Some details: "struct private" contains:

        struct net_device *dev;
        struct net_device *mesh_dev; /* Virtual device */
        struct net_device *rtap_net_dev;

The old code did have an

        dev = alloc_etherdev(sizeof(struct lbs_private));"

and the other two netdevs got initialized at some other location:

* priv->lbs_add_mesh() in lbs_add_mesh()
  via "alloc_netdev(0, "msh%d", ether_setup)". And lbs_add_mesh()
  is called only when the hardware supports this.
* rtap_net_dev is created in lbs_add_rtap() and again I haven't
  change the creation of this thingy.

Please note that when I'm using the card in station mode, both 
mesh_dev and rtap_net_dev are NULL. My firmware doesn't have 
mesh code, and only when I set the card into monitor mode will 
the rtap_net_dev created.


I kept this behavior for now: at initialzation I call:

        wdev = lbs_wdev_alloc(sizeof(struct lbs_private), dmdev);
	wdev->xyz = initialization;
        ...
        dev = alloc_netdev()


For me it's not clear if I should create wdev's for mesh_dev and 
rtap_net_dev as well. However, I'm not able to check the mesh 
code anyway: my firmware doesn't support this. And for 
rtap_net_dev I'm not sure if this shouldn't be handled 
differently in a cfg80211 scenario, e.g. via 
lbs_cfg80211_change_iface().

A hint of what I should then would be most welcome :-)


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