linux-kernel - Re: Regression 3.0-rc5+ : khubd blocked

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Date:	Sat, 02 Jul 2011 00:05:24 +0200
From:	Éric Piel <E.A.B.Piel@...elft.nl>
To:	Sarah Sharp <sarah.a.sharp@...ux.intel.com>,
	Alan Stern <stern@...land.harvard.edu>
CC:	Greg KH <gregkh@...e.de>, LKML <linux-kernel@...r.kernel.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: Regression 3.0-rc5+ : khubd blocked

Op 01-07-11 22:08, Sarah Sharp schreef:
> On Fri, Jul 01, 2011 at 01:19:23PM -0400, Alan Stern wrote:
>> On Fri, 1 Jul 2011, [ISO-8859-1] ?ric Piel wrote:
>>
>>> Sorry, but from a quick look, it seems to not fix the bug.
>>>
>>> I'll try further on Monday.
>>
>> Do you get a similar message from the task watchdog?  The patch should
>> have caused usb_set_interface() to return early, without trying to
>> acquire the mutex that caused the problem before.
>
> I've been able to reproduce this bug with linus/master.  When I apply
> your patch (or at least change the code to match your patch, since I
> don't have those top-level directories), I can successfully unplug and
> replug in a hub with a keyboard and mouse attached to it, with no hangs.
> So I'm not sure why it isn't working for Éric.
Hi,
I've found out it was not the patched kernel that I was tested (but just 
linus/master), due to a mistake in selecting the right kernel in grub. 
So that'd explain why I was still seeing the bug ;-)

Thanks everyone for reacting to this bug so quickly!
Éric
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