Re: [RFC] usb, ehci: repeated failover leaves leftover qh_next.ptr

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On Thu, Mar 31, 2011 at 09:53:00PM -0400, Alan Stern wrote:
> > We aren't sure if this is the correct way to solve the problem and are
> > looking for guidance from people more knowledgable.
> > 
> > Thoughts?
> 
> It's not the best solution.  We want to prevent this failure mode from
> _ever_ occurring, not just from occurring when the controller has been
> removed.
> 
> > Cheers,
> > Don
> > 
> > --
> > Note:  this problem was discovered, analyzed, and solved on RHEL-6 which is
> > closely related to 2.6.32 with regards to the usb2 stack.  The customer
> > doesn't have the time to use upstream kernels.  The changes in this area
> > since 2.6.32 seemed minimal enough, that I believe the problem is still
> > relevant.
> 
> See what they think of the patch below.  Note: Totally untested.  I
> haven't tried running it myself.

Thanks!  I'll pass it along and hope to get some feedback in the next
couple of days.

Cheers,
Don
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