On Monday 22 March 2010 23:19:54 Larry Finger wrote: > On 03/22/2010 04:55 PM, Michael Buesch wrote: > > > > I don't see a problem for udev to distinguish the cards. It can do it merely on > > the bus-ID. That's unique. Yeah, it might change if you change the hardware. > > But do we care? I say no, because you cannot actually change the hardware in real life > > for any of these devices. And even if you could reorder the devices on the bus or whatever. > > What would happen? The card would get a new MAC address. That's all. That's acceptable. > > > > The kernel would (for example) just set the mac address to all-ones. Udev would > > notice this (invalid) mac address and reassign a new persistent one to the device. It then > > stores the address on the harddisk. > > What ensures that this persistent name would be unique? The same mechanism that ensures that an UUID is unique: A good random number generator. > > In fact, if we implement a mechanism in the kernel, we have _exactly_ the same problem. > > However, currently Larry's patches just ignore that problem and assume that there's only > > one card in the system anyway. > > As I said in a posting a few minutes ago, that problem is solved. Well. You distinguish by bus-ID, right? That's exactly the thing that udev does. -- Greetings, Michael. -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
