Re: Device with two interfaces - what is the probing order?

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On Fri, Mar 29, 2024 at 01:36:18PM +0200, Bitterblue Smith wrote:
> On 28/03/2024 22:05, Alan Stern wrote:
> > On Thu, Mar 28, 2024 at 09:08:43PM +0200, Bitterblue Smith wrote:
> >> Hi all,
> >>
> >> Given a USB Wifi device with two "identical" interfaces,
> >> in what order are the interfaces probed? Is the order guaranteed?
> > 
> > They are probed in the order that they are listed in the 
> > Get-Config-Descriptor output.  But this is not guaranteed.
> > 
> > Alan Stern
> 
> Is it guaranteed that they are probed one at a time, not in parallel?

Yes, all USB probes are in sequence.

> Oh, and what about the disconnect function? Is that guaranteed to be called not in parallel?

Yes.

hope this helps,

greg k-h




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