On Sat, 17 Feb 2007, Pete Zaitcev wrote:

> BTW, Oliver, look at the complete dmesg which Berck attached... It's full
> of EIOs when discovering hubs. I suspect that some transaction ended with
> an error and that got cdc-acm confused. The modem is probably a cellphone.

Hah!  Here's an example of the bogus errors showing up in that log:

[  147.441431] usb-storage: probe of 1-1:1.0 failed with error -5
[  147.447431] usb-storage: probe of 1-2:1.0 failed with error -5
[  147.453375] usb-storage: probe of 1-2:1.1 failed with error -5
[  147.459333] usb-storage: probe of 2-1:1.0 failed with error -5
[  147.465290] usb-storage: probe of 2-2:1.0 failed with error -5
[  147.471220] usb-storage: probe of 3-1:1.0 failed with error -5

This is obviously a failure of the USB ID-matching code.  Greg, it is 
exactly the bug which this patch was intended to fix:

http://marc.theaimsgroup.com/?l=linux-usb-devel&m=117095792821522&w=2

(Berk, you can see if that patch solves your problem.)

For some reason the patch seems to have slipped through the net.  I think
it should be applied and sent up to Andrew Morton ASAP.

Alan Stern


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