Re: Oops w/sysfs when closing a disconnected usb serial device

[Greg KH]

On Tue, Dec 02, 2003 at 12:41:13PM +0530, Maneesh Soni wrote:
> Hi Mike,
> 
> I think now I understand the problem better. It looks to me a case of
> parent kobject going away before child. 

Yes, but I don't see how that is happening in the usb code :(

> As we have 
> 
> > sysfs 1-1: removing dir
> >  o 1-1:1.0 (10): <7>removing<7> done
> 
> and then
> > sysfs 1-1:1.0: removing dir
> 
> Its good that you enabled debug printks. We can see error 
> 
> > usb 1-1: hcd_unlink_urb d3d33f60 fail -22

This isn't an error, it can be ignored.  It just means that the driver
told the usb core to unlink a urb that was already unlinked.  Very
common thing.

> I think Greg or Pat can help you better in this case. I have no idea if 
> this error is creating this problem.

It's not this error, but something else.  The usb-serial code hasn't
changed in a while.  Can you try figuring out what kernel version this
bug shows up in?

thanks,

greg k-h
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