Re: Unsupported device message, Compliance C.2, part 4

Alan Stern <[email protected]>
Newsgroups gmane.linux.usb.devel
Message-ID <[email protected]>
On Tue, 9 Oct 2007, Aras Vaichas wrote:

> I was just looking at sysfs and I noticed that when a known USB device is 
> plugged in that a "product" file is created in 
> /sys/devices/platform/at91_ohci/usb1/1-1/
> 
> An unknown device will not cause this file to be created, therefore that sounds 
> like a good signalling mechanism to me. This is something that I can work with.

As you have already realized, the presence of that attribute has 
nothing to do with whether or not the device is "known".  It depends 
only on whether or not the device includes a "product" string among its 
descriptors.

Alan Stern


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