linux-kernel - Re: [BISECTED] Re: [BUG] Linux-2.6.31-rc1 Fails To Recognize Some USB Disks

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Message-ID: <4A6D64DC.3020001@panasas.com>
Date:	Mon, 27 Jul 2009 11:27:08 +0300
From:	Boaz Harrosh <bharrosh@...asas.com>
To:	"Martin K. Petersen" <martin.petersen@...cle.com>
CC:	Matthew Wilcox <matthew@....cx>,
	Tarkan Erimer <tarkan.erimer@...knet.net.tr>,
	linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org
Subject: Re: [BISECTED] Re: [BUG] Linux-2.6.31-rc1 Fails To Recognize Some
 USB Disks

On 07/27/2009 05:43 AM, Martin K. Petersen wrote:
>>>>>> "Matthew" == Matthew Wilcox <matthew@....cx> writes:
> 
> First let's see if I actually interpreted the responses correctly and
> that this fixes the issue.
> 
> Matthew> and the sd code seems to check for that.  So what bug are you
> Matthew> papering over here?
> 
> The USB drive in question appears to go tits up when we send it an
> extended inquiry.  I contemplated adding a BLIST option but we really
> only need EVPD to access pages 0xB0 and 0xB1.  

I don't understand. The device in question breaks when we try to read
a page that it reported it supports? we did do
        /* Ask for all the pages supported by this device */
        result = scsi_vpd_inquiry(sdev, buf, 0, 255);
        if (result)
                goto fail;
Didn't we? Are we checking that 0xB0 or 0xB1 are returned?

The Block Limits page
> appeared in SBC2 so I'm just trying to play it safe.  And hopefully fix
> Tarkan's problem in the process.
> 

Thanks
Boaz
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