[PATCH] alauda: do not use stack for URB transfer_buffers

[Brian Norris]

On Wed, Aug 21, 2013 at 09:59:27AM +0200, Bjørn Mork wrote:
> Brian Norris <computersforpeace at gmail.com> writes:
> > On Tue, Aug 06, 2013 at 03:03:29PM +0300, Jussi Kivilinna wrote:
> >> Patch fixes alauda not to use stack as URB transfer_buffer. URB buffers need to
> >> be DMA-able, which stack is not.
> >>
> >> Patch is only compile tested.
> >>
> >> Cc: stable at vger.kernel.org
> >> Signed-off-by: Jussi Kivilinna <jussi.kivilinna at iki.fi>
> >> ---
> >>  drivers/mtd/nand/alauda.c |   74 ++++++++++++++++++++++++++++++++++-----------
> >>  1 file changed, 56 insertions(+), 18 deletions(-)
> >
> > Just FYI, this driver is being removed, so I'm obviously not taking this
> > patch :)
>
> I think you should apply it anyway. The driver is still in v3.11 AFAICS,
> and the patch should also go to the maintained stable kernels. You
> cannot remove the driver from them, and I don't see a later driver
> removal as a valid reason not to fix a known bug with a patch.

Seriously?

The reasons given for removal:

  "The driver has very low utility.  Devices in question are limited to
  about 400kB/s and the only known user (me) discarded the hardware
  several years back."

And:

  "Maybe we should just remove the driver and not spend any more time on
  it?"

So you're suggesting applying an untested (compile-only) fix for an
unobserved bug for the theoretical user of old, slow hardware who wants
to use a recent stable kernel, when the last known user has given up on
the driver entirely?

Anyway, just because you complained, I rebased and applied this to
l2-mtd.git before the driver removal. I'll defer to dwmw2 whether this
patch gets squashed out of existence.

Brian