From: Greg KH <gregkh@linuxfoundation.org>
To: Bitterblue Smith <rtl8821cerfe2@gmail.com>
Cc: Alan Stern <stern@rowland.harvard.edu>, linux-usb@vger.kernel.org
Subject: Re: Device with two interfaces - what is the probing order?
Date: Fri, 29 Mar 2024 12:47:27 +0100 [thread overview]
Message-ID: <2024032907-smokeless-imperial-f3f9@gregkh> (raw)
In-Reply-To: <77a2f290-2f63-42d8-a6d2-25840049beca@gmail.com>
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
next prev parent reply other threads:[~2024-03-29 11:47 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-28 19:08 Device with two interfaces - what is the probing order? Bitterblue Smith
2024-03-28 20:05 ` Alan Stern
2024-03-29 11:36 ` Bitterblue Smith
2024-03-29 11:47 ` Greg KH [this message]
2024-03-29 12:53 ` Bitterblue Smith
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