Johannes,

A few questions about this patch:

> > 1.  USB PnP support (usbd etc.); permanence of usbdevfs?
> 
> I've been involved in this quite a bit recently.
> 
> First off, I've attached a patch to completely nuke 
> usbdevfs's VFS layer in
> favor of using devfs for all of that stuff. Nodes are still 
> created, and you
> use the same ioctl()'s, you just use a different name and you 
> don't have
> to worry about mounting an extra filesystem to get it.

Does this address Jim Gettys's issues about the permanence
(guaranteed existence) of /proc/bus/usb/devices or some
other way to guarantee X that it will receive connect/disconnect
events?  And not miss any of them?

Does this patch (using devfs) use some form of message passing
to get events from the kernel to a usb daemon?  And then how
do events get from the usb daemon to X, for example?

And with the same ioctl's as usbdevfs, working userspace drivers
(like rio500 using usbdevfs) will still work?


Thanks,
Randy


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