Re: 3.0-rc6: USB khubd deadlock when hub is powered down

[Greg KH]

 On Thu, Jul 07, 2011 at 03:38:49PM +0200, Stefan Richter wrote:
> On Jul 07 Stefan Richter wrote:
> > It appears to be a regression from -rc4 to -rc6.  At the second occasion
> > that I switched the monitor off while running 3.0-rc6, the same happened
> > again.  (IOW judging from the mere two tries I did so far, this issue is
> > 100% reproducible.)
> > 
> > khubd locked up; no subsequent device re-attachments were recognized;
> > only an USB mouse that was attached to a motherboard USB port already
> > before the deadlock continued to let me move the pointer.
> 
> Sarah, "gitk v3.0-rc4.. drivers/usb/core/" makes it look like this is from
> commit fccf4e86200b8f5edd9a65da26f150e32ba79808.  When I find spare time I
> will test 3.0-rc6 with that one reverted.

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.

thanks,

greg k-h