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

[Jussi Kivilinna]

On 21.08.2013 11:41, Brian Norris wrote:
> 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.

If this is the case, please ignore this patch. I should not have marked it for stable in first place, since it is just compile-tested.

-Jussi

> 
> Brian
>