linux-kernel - Re: [linux-usb-devel] [PATCH] base/class.c: prevent ooops due to insert/remove race (v3)

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Message-ID: <20071129221132.GA13651@suse.de>
Date:	Thu, 29 Nov 2007 14:11:32 -0800
From:	Greg KH <gregkh@...e.de>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	Mark Lord <lkml@....ca>, Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...l.org>,
	linux-usb-devel@...ts.sourceforge.net,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [linux-usb-devel] [PATCH] base/class.c: prevent ooops due to
	insert/remove race (v3)

On Thu, Nov 29, 2007 at 05:07:58PM -0500, Alan Stern wrote:
> On Thu, 29 Nov 2007, Mark Lord wrote:
> 
> > > So again, the problem is in the higher up scsi layer, and that is where
> > > the problem should already be fixed.
> > ..
> > 
> > Ahhh.. so you figure the Oops should also have been fixed
> > as part of the 2.6.24 SCSI fixes ?  That's what I was missing here.
> 
> Yes indeed.  I wish I could point you to the exact patch containing the 
> fix, but the git software seems to have lost track of it (it's combined
> in with a large number of other patches with no obvious way to separate 
> it out).  It's also available in the various mailing list archives, but 
> I don't have a pointer to it and there's no reasonable way to search 
> for it.
> 
> The patch in question was written by Matthew Wilcox; it added code to 
> the SCSI async-scanning routines to utilize the scan_mutex.  IMO it 
> should have been applied to 2.6.23 but it wasn't.

If someone can dig it out, and send it to stable@...nel.org, I'd be
gladd to add it to the older kernel trees...

thanks,

greg k-h
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