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Date: Wed, 16 Jun 2010 11:27:22 +0300
From: roma1390 <roma1390@gmail.com>
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To: Oliver Neukum <oneukum@suse.de>
CC: linux-kernel@vger.kernel.org,
       "linux-usb@vger.kernel.org" <linux-usb@vger.kernel.org>
Subject: Re: INFO: task khubd:271 blocked for more than 120 seconds.
References: <4C18855E.5010508@gmail.com> <201006161022.32398.oneukum@suse.de>
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Hello,

Oliver Neukum wrote:
> Am Mittwoch, 16. Juni 2010 10:03:42 schrieb roma1390:
>> Hello,
>>
>>
>> We got this on our production system. Kernel: 2.6.26-2-amd64.
>> This seems to be related with http://bugzilla.kernel.org/show_bug.cgi?id=13316 and still is open. Sadly to have such long standing bugs in common used subsystems like USB.
>>
> 
> Under which conditions did you get this? Physical unplug, S3 or S4?
> 
> 	Regards
> 		Oliver

this was normal operation (no unplug, no S3 or something like that). This is on-line
server. There is posible issue with usb device itself or physical usb port. Which
sometimes causes device disconections, reconnections.

Of course it's posible to fix on hardware level, but OS can't do such nasty things also.