Panic when removing Airprime PC5220 card (usb hub).

David Andersen dga+ at
Wed May 11 08:22:09 PDT 2005

On May 11, 2005, at 11:17 AM, M. Warner Losh wrote:

> In message: <200505111627.04961.hselasky at>
>             Hans Petter Selasky <hselasky at> writes:
> : On Wednesday 11 May 2005 09:59, David Andersen wrote:
> : > I'm hacking up a quick and dirty driver for the AirPrime PC5220 
> (EVDO /
> : > 1xRTT) card, but I'm encountering a crash unrelated to my driver.  
> The
> : > card is a pc card that presents itself as a USB hub with one device
> : > hanging off of it.  Removing the card from the system causes a 
> kernel
> : > panic.:

> >
> : I think that the existing USB driver does not allow USB-controllers 
> to be
> : detached. At least the root-hub does not allow this. And when they 
> try to
> : detach, the devices are deleted twice (which is due to the fact that 
> the code
> : was ported from NetBSD, which bus interface is a little different).
> Actually, -current has fixed both of these problems.  At least that's
> what my looking at the source shows in addition to being the one to
> make the fixes...

Ahh, great.  Thank you - I should have mentioned that I was using 
-stable, but that was probably apparent if you fixed the problem 
already.  Are these changes something I could backport easily, or do 
they depend on other -current changes?


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