On Tue, Jul 5, 2011 at 5:05 PM, Thomas Jarosch
<thomas.jarosch@xxxxxxxxxxxxx> wrote:
> On Monday, 4. July 2011 14:27:29 Uwe Bonnes wrote:
>> Thomas> The code will also "work" if VID or PID is NULL only.
>>
>> Is any VID/PID == 0 valid? Should we make the condition VID==0 AND
>> PID==0?
>
> This document http://wiki.debian.org/HowToIdentifyADevice/USB mentions
> that USB (root) hubs contain VID/PID == 0. Shouldn't be a problem.
>
That is no longer the case, the document is outdated. Now lsusb
will use the Linux Foundation USB VID/PIDs for the root hubs.
For USB, VID:PID=0:0 is not a valid USB device, typically unrecognized
USB device will have that.
--
Xiaofan
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