linux-kernel - Re: [usb-storage] 2.6.22-rc4-mm2

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Message-ID: <Pine.LNX.4.44L0.0706081011250.3473-100000@iolanthe.rowland.org>
Date:	Fri, 8 Jun 2007 10:16:50 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Peter Zijlstra <peterz@...radead.org>
cc:	USB Storage list <usb-storage@...ts.one-eyed-alien.net>,
	Kernel development list <linux-kernel@...r.kernel.org>
Subject: Re: [usb-storage] 2.6.22-rc4-mm2 - usb-storage

[Trimmed the recipients list]

On Fri, 8 Jun 2007, Peter Zijlstra wrote:

> On Thu, 2007-06-07 at 18:20 -0400, Alan Stern wrote:
> > On Thu, 7 Jun 2007, Peter Zijlstra wrote:
> > 
> > > My kernel went chatty when I tried to access my usb-stick; which it
> > > didn't seem to find.
...
> > This is false-alarm output from something intended to track down a 
> > reported bug.  The patch responsible is this one: 
> 
> Right, well then I have another problem. Because it doesn't find my
> usb-stick.
> 
> I noticed from D states (quite easy to reproduce, just modprobe
> usb-storage):
> 
> scsi_eh_6     D ffff8100079ed640     0  3568      2 (L-TLB)
>  ffff81000ac45e10 0000000000000046 0000000000000000 0000000180252936
>  0000000000000002 0000000100000000 ffff81000ac42700 ffff8100043ca240
>  ffff81000ac42978 ffffffff8024fc8d 00000000000000ff ffff81000ac42700
> Call Trace:
>  [<ffffffff804775a9>] wait_for_completion+0x82/0xc1
>  [<ffffffff88201673>] :usb_storage:command_abort+0x7c/0x86
>  [<ffffffff8805f54f>] :scsi_mod:scsi_error_handler+0x28e/0x4cc
>  [<ffffffff8024a7ff>] kthread+0x47/0x74
>  [<ffffffff8020cc28>] child_rip+0xa/0x12

Okay, this is a separate problem.  To help diagnose it, please turn on 
CONFIG_USB_DEBUG and CONFIG_USB_STORAGE_DEBUG and then post the 
resulting dmesg log.

Alan Stern

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