linux-kernel - Re: Oops in scsi_send_eh_cmnd 2.6.21-rc5-git6,7,10,13

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Message-Id: <1175895346.3677.57.camel@mulgrave.il.steeleye.com>
Date:	Fri, 06 Apr 2007 16:35:46 -0500
From:	James Bottomley <James.Bottomley@...elEye.com>
To:	David Miller <davem@...emloft.net>
Cc:	aab@...hlid.com, cebbert@...hat.com, linux-kernel@...r.kernel.org,
	linux-scsi@...r.kernel.org, aradford@...il.com
Subject: Re: Oops in scsi_send_eh_cmnd 2.6.21-rc5-git6,7,10,13

On Fri, 2007-04-06 at 11:32 -0700, David Miller wrote:
> From: James Bottomley <James.Bottomley@...elEye.com>
> Date: Fri, 06 Apr 2007 10:27:57 -0500
> 
> > On Fri, 2007-04-06 at 08:12 -0700, Andrew Burgess wrote:
> > > Yes. The 3w-xxxx.c driver changed between 2.6.18 and 2.6.20 but
> > > nothing jumps out to my untrained eyes. Here's the diff:
> > > Also, I should mention that the working kernel is a fedora
> > > rpm (2.6.18-1.2798.fc6) so I don't know what patches are in it.
> > > The vmlinuz is dated Oct 6 2006.
> > 
> > It's actually a long standing bug in the 3w-xxxx driver.  Apparently it
> > assumes request sense is always the use_sg == 0 case.  This is what it
> > does on a request sense:
> 
> Thanks for figuring this out James.  I was very worried there
> was some bug in my scsi_send_eh_cmnd() fix :)

You're welcome ... the code in the fix looked fine, which is why I was
initially suspicious ... however, the bug in __free_page() on reversion
pretty much confirmed a driver issue.

James


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