linux-kernel - Re: [Stable-review] [25/29] USB: fix usbstorage for 2770:915d delivers no FAT

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Date:	Fri, 22 Jan 2010 22:05:28 -0800
From:	Greg KH <gregkh@...e.de>
To:	Ben Hutchings <ben@...adent.org.uk>
Cc:	stern@...land.harvard.edu, linux-kernel@...r.kernel.org,
	stable@...nel.org, Rohan Hart <rohan.hart17@...il.com>,
	Ryan May <rmay31@...il.com>, akpm@...ux-foundation.org,
	torvalds@...ux-foundation.org, stable-review@...nel.org,
	alan@...rguk.ukuu.org.uk
Subject: Re: [Stable-review] [25/29] USB: fix usbstorage for 2770:915d
	delivers no FAT

On Sat, Jan 23, 2010 at 02:43:46AM +0000, Ben Hutchings wrote:
> On Fri, 2010-01-22 at 16:10 -0800, Greg KH wrote:
> > 2.6.32-stable review patch.  If anyone has any objections, please let us know.
> > 
> > ------------------
> > 
> > From: Ryan May <rmay31@...il.com>
> > 
> > commit 10d2cdb6102669279bee2d9a00a22431b74583d5 upstream.
> > 
> > Resolves kernel.org bug 14914.
> > 
> > Remove entry for 2770:915d (usb digital camera with mass storage
> > support) from unusual_devs.h. The fix triggered by the entry causes
> > the file system on the camera to be completely inaccessible (no
> > partition table, the device is not mountable).
> > 
> > The patch works, but let me clarify a few things about it.  All the
> > patch does is remove the entry for this device from the
> > drivers/usb/storage/unusual_devs.h, which is supposed to help with a
> > problem with the device's reported size (I think).  I'm pretty sure it
> > was originally added for a reason, so I'm not sure removing it won't
> > cause other problems to reappear.  Also, I should note that this
> > unusual_devs.h entry was present (and activating workarounds) in
> > 2.6.29, but in that version everything works fine.  Starting with
> > 2.6.30, things no longer work.
> [...]
> 
> It doesn't sound like this bug or fix are sufficiently well understood
> yet to be suitable for a stable update.  The bug report is currently
> marked as invalid!

It was marked that way as we couldn't take a patch through a bug report.
The email thread for it said it solved the problem, and I have had a
number of other users report that it solves their problem as well.

So I do think it needs to remain, unless someone has a report to the
contrary?  And if so, I'll be glad to take it out of the main tree, and
then take that back to the -stable tree.

thanks,

greg k-h
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