Re: UHCI rmmod oops messages (was Re: Same question, chorus for verse 28)

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On Mon, 19 Sep 2011, Greg KH wrote:

> On Sun, Sep 18, 2011 at 12:58:49PM -0400, Alan Stern wrote:
> > On Sun, 18 Sep 2011, Greg KH wrote:
> > > If you don't want a novell.com bugzilla id (which I understand if you
> > > don't), I'll dig the data out of the bug and post it here, as it looks
> > > to affect the 2.6.32 kernel, which wasn't all that old.
> > 
> > It's been a long time since I used Novell's bugzilla.  My computer 
> > remembers the ID "stern58".  Still, it might be a good idea to post 
> > the relevant data publically, if the other people involved don't mind.
> 
> The bug seems to be "closed" as it's dealing with a customer's system
> and they don't like public bugs for their hardware for various reasons.
> 
> But here's the oops report from the bug, pasted from it:
> 
> --- begin quote ---
> 
> After I do a
> # rmmod uhci_hcd 
> I get the following:
> 
> sles11sp1:/tmp/intel/crash-vnc # tail -f /var/log/messages 
> Sep  5 15:26:54 sles11sp1 kernel: [ 4647.721936] uhci_hcd 0000:00:1d.2: remove, state 1
> Sep  5 15:26:54 sles11sp1 kernel: [ 4647.721945] usb usb8: USB disconnect, address 1
> Sep  5 15:26:54 sles11sp1 kernel: [ 4647.721947] usb 8-1: USB disconnect, address 2
> Sep  5 15:26:54 sles11sp1 kernel: [ 4647.769335] uhci_hcd 0000:00:1d.2: dma_pool_destroy uhci_qh, ffff880037849000 busy
> Sep  5 15:26:54 sles11sp1 kernel: [ 4647.769338] uhci_hcd 0000:00:1d.2: dma_pool_destroy uhci_td, ffff880037833000 busy
> Sep  5 15:26:54 sles11sp1 kernel: [ 4647.769344] uhci_hcd 0000:00:1d.2: USB bus 8 deregistered
> Sep  5 15:26:54 sles11sp1 kernel: [ 4647.769348] uhci_hcd 0000:00:1d.2: dma_pool_destroy buffer-128, ffff880037822000 busy
...

> --- end quote ---
> 
> Does that sound like anything that has been fixed in the past few years
> that you can recall?

Hmmm, nothing especially stands out.  There was a similar problem in 
ehci-hcd, but I don't remember anything in uhci-hcd.

Is there any way to find out if the problem still appears with a 
current kernel?  Or to find out how the problem can be reproduced?

Alan Stern

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