Re: USB device with multiple non-sequential interfaces

["Kevin Lloyd" <klloyd@xxxxxxxxxxxxxxxxxx>]

Given this is a violation of the USB spec do you foresee removing
support in the future (i.e. erroring-out as opposed to just warning the
user)?
 
Thanks,
-Kevin

> On Wed, 28 Nov 2007, Kevin Lloyd wrote:
> 
> > Hi all,
> > 
> > When I plugged in a USB device that has two interfaces that are not
> > sequential, say interface#1 and interface#99 I get the following
error
> > message:
> >        usb 2-2: config 1 has an invalid interface number: 99 but max
is
> > 1
> > 	usb 2-2: config 1 has no interface number 1
> > 
> > I was wondering what the reason for this is, why would it not be
okay to
> > have multiple interfaces that are not sequentially numbered?
>
> Because the USB spec says interfaces must be numbered sequentially 
> starting from 0.
>
> > Also I that it still loaded the driver for the second interface, is
this
> > maybe just a warning?
>
> Yes.
>
> Alan Stern



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