linux-kernel - Re: rmmod uhci_hcd -> BUG: atomic counter underflow

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Date:	Mon, 12 Mar 2007 17:50:19 +0100
From:	Jiri Slaby <jirislaby@...il.com>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	Linux kernel mailing list <linux-kernel@...r.kernel.org>,
	linux-usb-devel@...ts.sourceforge.net
Subject: Re: rmmod uhci_hcd -> BUG: atomic counter underflow

Jiri Slaby napsal(a):
> Alan Stern napsal(a):
>> On Mon, 12 Mar 2007, Jiri Slaby wrote:
>>> After rmmoding of uhci_hcd on fresh booted 2.6.21-rc3-mm2 I got this:
>>>
>>> BUG: atomic counter underflow at:
> [...]
>>>   [<c01db754>] kobject_put+0x14/0x16
>>>   [<c01db8a3>] kobject_unregister+0x22/0x25
>>>   [<c024c987>] bus_remove_driver+0x75/0x82
>>>   [<c024d3b8>] driver_unregister+0xb/0x18
>>>   [<c01e7020>] pci_unregister_driver+0x13/0x73
>>>   [<f88dbbd9>] uhci_hcd_cleanup+0xd/0x2d [uhci_hcd]
> [...]
>> Would it be possible for you to add the atomic counter underflow check 
>> to 2.6.21-rc3 and see if the problem still occurs?  If it doesn't, 
>> that's a good indication the USB stack isn't guilty -- the bus 
>> registration code hasn't changed for several kernel releases.
> 
> Yes.

I can confirm, that this issue went upstream and is currently present there.

regards,
-- 
http://www.fi.muni.cz/~xslaby/            Jiri Slaby
faculty of informatics, masaryk university, brno, cz
e-mail: jirislaby gmail com, gpg pubkey fingerprint:
B674 9967 0407 CE62 ACC8  22A0 32CC 55C3 39D4 7A7E

Hnus <hnus@...muni.cz> is an alias for /dev/null
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