linux-kernel - Re: USB misbehavior causes system hang

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Message-Id: <20070305021728.4c36dd4b.akpm@linux-foundation.org>
Date:	Mon, 5 Mar 2007 02:17:28 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	ebuddington@...leyan.edu
Cc:	ebuddington@...izon.net, linux-kernel@...r.kernel.org,
	linux-usb-devel@...ts.sourceforge.net
Subject: Re: USB misbehavior causes system hang

> On Tue, 27 Feb 2007 09:06:21 -0500 Eric Buddington <ebuddington@...izon.net> wrote:
> 2.6.20-mm2 #1 Mon Feb 26 13:16:04 EST 2007 i686 unknown
> 
> I have an external USB drive (WD MyBook 5000YS), which I use for backups.
> 
> When I try to back up to it, it works for a while, but inevitably
> starts resetting like mad, gives I/O errors, and then (here's the
> problem), the softdog module reboots the system.
> 
> ---------------------------
> scsi1 : SCSI emulation for USB Mass Storage devices
> input: Western Digital External HDD as /class/input/input8
> input: USB HID v1.11 Device [Western Digital External HDD] on usb-0000:00:03.2-6
> .2
> scsi 1:0:0:0: Direct-Access     WD       5000YS External  106a PQ: 0 ANSI: 4
> SCSI device sda: 976773168 512-byte hdwr sectors (500108 MB)
> sda: Write Protect is off
> sda: assuming drive cache: write through
> SCSI device sda: 976773168 512-byte hdwr sectors (500108 MB)
> sda: Write Protect is off
> sda: assuming drive cache: write through
>  sda: sda1 sda2
> sd 1:0:0:0: Attached scsi disk sda
> sd 1:0:0:0: Attached scsi generic sg0 type 0
> reiser4[pdflush(194)]: disable_write_barrier (fs/reiser4/wander.c:234)[zam-1055]
> :
> NOTICE: md1 does not support write barriers, using synchronous write instead.
> reiser4: sda2: found disk format 4.0.0.
> 
> ---- (works fine here for a while, then:) ----------
> 
> usb 1-6.2: reset high speed USB device using ehci_hcd and address 36
> usb 1-6.2: device descriptor read/64, error -110
> usb 1-6.2: device descriptor read/64, error -110
> usb 1-6.2: reset high speed USB device using ehci_hcd and address 36
> usb 1-6.2: device descriptor read/64, error -110
> usb 1-6.2: device descriptor read/64, error -110
> usb 1-6.2: reset high speed USB device using ehci_hcd and address 36
> usb 1-6.2: device descriptor read/8, error -110
> usb 1-6.2: device descriptor read/8, error -110
> usb 1-6.2: reset high speed USB device using ehci_hcd and address 36
> usb 1-6.2: device descriptor read/8, error -110
> usb 1-6.2: device descriptor read/8, error -110
> sd 1:0:0:0: scsi: Device offlined - not ready after error recovery
> sd 1:0:0:0: SCSI error: return code = 0x00050000
> end_request: I/O error, dev sda, sector 919931588
> sd 1:0:0:0: rejecting I/O to offline device
> sd 1:0:0:0: SCSI error: return code = 0x00010000
> end_request: I/O error, dev sda, sector 919931828
> sd 1:0:0:0: rejecting I/O to offline device
> sd 1:0:0:0: rejecting I/O to offline device
> sd 1:0:0:0: rejecting I/O to offline device

Does 2.6.20 do this?  2.6.21-rc1?

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