Re: 3.0-rc6: USB khubd deadlock when hub is powered down
From: Sarah Sharp
Date: Thu Jul 07 2011 - 16:42:11 EST
On Thu, Jul 07, 2011 at 09:24:49PM +0200, Stefan Richter wrote:
> On Jul 07 Greg KH wrote:
> > Can you test Linus's tree, along with a patch sent yesterday from Alan
> > Stern to the linux-usb mailing list (attached below)? That should
> > resolve this issue, if not, please let us know.
>
> OK. I am using 3.0-rc6-71-g4dd1b49 plus Alan's "USB: additional
> regression fix for device removal" now. So far it survived a dozen of
> power toggles of the hub and the attached devices. Thanks.
>
> Alan Stern wrote:
> > Still, we need to rewrite this stuff. A possible race remains,
>
> On a general level, the last few kernel.org releases have all been rather
> weak. Dissatisfied,
For USB regressions or the kernel overall? Yes, last kernel release had
some nasty regressions-disguised-as-bug-fixes in the USB tree as well.
My fault there, not sure how to improve other than coming up with a list
of every possible plug-unplug/reset/configure/alt setting change
combination possible and testing before sending any thing at all.
Suggestions welcome, testing appreciated.
Sarah Sharp
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