Re: EHCI warning triggered in 2.6.31-rc5-git on device removal

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On Tue, Aug 04, 2009 at 10:47:19AM -0700, Greg KH wrote:
> So I was testing some tty changes, and I just ran across this on Linus's
> latest tree (no other patches added), when I remove a USB mouse from a
> USB 2.0 hub (typed in by hand...)

It was removing a keyboard, not a mouse, the mouse was still plugged in,
I was trying to remove the mouse.

> WARNING: at drivers/usb/host/ehci-hcd.c:906 ehci_urb_dequeue+0xa8/0x19a()
> Hardware name: To Be Filled By O.E.M.
> Modules linked in:  lots...
> Pid: 22, comm: khubd Not tainted 2.6.21-rc5 #1
> Call Trace:
>  ? ehci_urb_dequeue+0xa8/0x19a
>  warn_slowpath_common+0x77/0xa4
>  warn_slowpath_null+0xf/0x11
>  ehci_urb_dequeue+0xa8/0x19a
>  unlink1+0xc8/0xda
>  usb_hcd_flush_endpoint+0x71/0x1c9
>  usb_disable_endpoint+0x4a/0x1c5
>  usb_disconnect+0xdd/0x19a
>  hub_thread+0x80d/0x1682
>  ? autoremove_wake_function+0x0/0x38
>  ? hub_thread+0x0/0x1682
>  kthread+0x88/90
>  child_rip+0xa/0x20
>  ? kthread+0x0/0x90
>  ? child_rip+0x/0x20
> 
> I get the warning twice, then the box is locked up.
> 
> Any ideas?
> 
> And yeah, it is a fun "Hardware name"...
> 
> thanks,
> 
> greg k-h
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