Re: Oops w/sysfs when closing a disconnected usb serial device
From: Greg KH
Date: Fri Dec 05 2003 - 18:41:24 EST
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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