linux-kernel - Re: [SCSI] can't plug Nokia 5300 anymore (bisected)

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Date:	Mon, 28 Jul 2008 22:19:41 +0200
From:	Cédric Godin <cedric@...bone.be>
To:	Alan Stern <stern@...land.harvard.edu>
CC:	James Bottomley <James.Bottomley@...senPartnership.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	SCSI Kernel <linux-scsi@...r.kernel.org>
Subject: Re: [SCSI] can't plug Nokia 5300 anymore (bisected)

Alan Stern wrote:
> On Mon, 28 Jul 2008, Cédric Godin wrote:
>
>   
>>>>>> Hello,
>>>>>>
>>>>>> since 2 or 3 -git kernels (Linus tree)  I have a problem with my laptop 
>>>>>> and its connection through USB to a nokia 5300 gsm.
>>>>>>
>>>>>> The logs show me a endless loop (until i unplug my USB cable) of 
>>>>>> following messages :
>>>>>>
>>>>>> Jul 25 15:19:14 enea sd 2:0:0:0: [sdb] ASC=0x0 ASCQ=0x0
>>>>>> Jul 25 15:19:14 enea sd 2:0:0:0: [sdb] Sense Key : 0x0 [current]
>>>>>> Jul 25 15:19:14 enea sd 2:0:0:0: [sdb] ASC=0x0 ASCQ=0x0
>>>>>> Jul 25 15:19:14 enea sd 2:0:0:0: [sdb] Sense Key : 0x0 [current]
>>>>>> Jul 25 15:19:14 enea sd 2:0:0:0: [sdb] ASC=0x0 ASCQ=0x0
>>>>>> Jul 25 15:19:14 enea sd 2:0:0:0: [sdb] Sense Key : 0x0 [current]
>>>>>> Jul 25 15:19:14 enea sd 2:0:0:0: [sdb] ASC=0x0 ASCQ=0x0
>>>>>> Jul 25 15:19:14 enea sd 2:0:0:0: [sdb] Sense Key : 0x0 [current]
>>>>>> Jul 25 15:19:14 enea sd 2:0:0:0: [sdb] ASC=0x0 ASCQ=0x0
>>>>>> Jul 25 15:19:14 enea sd 2:0:0:0: [sdb] Sense Key : 0x0 [current]
>>>>>>
>>>>>> I bisected the kernel and found the following commit as result :
>>>>>>
>>>>>> 427e59f09fdba387547106de7bab980b7fff77be is first bad commit
>>>>>> commit 427e59f09fdba387547106de7bab980b7fff77be
>>>>>> Author: James Bottomley <James.Bottomley@...senPartnership.com>
>>>>>> Date:   Sat Mar 8 18:24:17 2008 -0600
>>>>>>
>>>>>>    [SCSI] make use of the residue value
>>>>>>
>>>>>>    USB sometimes doesn't return an error but instead returns a residue
>>>>>>    value indicating part (or all) of the command wasn't completed.  So if
>>>>>>    the driver _done() error processing indicates the command was fully
>>>>>>    processed, subtract off the residue so that this USB error gets
>>>>>>    propagated.
>>>>>>             
>
>   
>> That's me sending the wrong dmesg, sorry :-$
>>
>> Attached is the "good" one.
>>
>>     
>>> see only one error, and the commit you found wouldn't have affected 
>>> that error.  More accurately, if the commit magnified the error into an 
>>> endless loop, then without the commit the error would still have been 
>>> present and would have caused data corruption.
>>>
>>> Anyway, it would be interesting to see what happens with the commit in 
>>> place and the following patch applied.  (The first part of the patch 
>>> has already been accepted by James.)
>>>   
>>>       
>> Same problem.
>>     
>
> Okay.  The problem is one we've seen many times in the past: The device
> reports that it contains one sector more than it really does contain.  
> When the system tries to access the non-existent "last" sector, all
> sorts of problems occur.  In your case the device returned no data,
> together with an indication that a problem existed (Check Condition
> status) and no indication of what the problem actually was (no Sense
> data).
>
> The patch below should fix the problem.
>
> Alan Stern
>
>
>
> Index: usb-2.6/drivers/usb/storage/unusual_devs.h
> ===================================================================
> --- usb-2.6.orig/drivers/usb/storage/unusual_devs.h
> +++ usb-2.6/drivers/usb/storage/unusual_devs.h
> @@ -225,6 +225,13 @@ UNUSUAL_DEV(  0x0421, 0x0495, 0x0370, 0x
>  		US_SC_DEVICE, US_PR_DEVICE, NULL,
>  		US_FL_MAX_SECTORS_64 ),
>  
> +/* Reported by Cedric Godin <cedric@...bone.be> */
> +UNUSUAL_DEV(  0x0421, 0x04b9, 0x0551, 0x0551,
> +		"Nokia",
> +		"5300",
> +		US_SC_DEVICE, US_PR_DEVICE, NULL,
> +		US_FL_FIX_CAPACITY ),
> +
>  /* Reported by Olaf Hering <olh@...e.de> from novell bug #105878 */
>  UNUSUAL_DEV(  0x0424, 0x0fdc, 0x0210, 0x0210,
>  		"SMSC",
>
>   
it works, thanks !

Tested-by: Cedric Godin <cedric@...bone.be>


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