Re: [PATCH] mmc: sh-mmcif: avoid Oops on spurious interrupts

[Chris Ball <cjb@laptop.org>]

Hi Kobayashi,

On Tue, Sep 25 2012, Tetsuyuki Kobayashi wrote:
> (09/19/2012 11:50 AM), Tetsuyuki Kobayashi wrote:
>> (2012/08/22 15:49), Guennadi Liakhovetski wrote:
>>> On some systems, e.g., kzm9g, MMCIF interfaces can produce spurious
>>> interrupts without any active request. To prevent the Oops, that results
>>> in such cases, don't dereference the mmc request pointer until we make
>>> sure, that we are indeed processing such a request.
>>>
>>> Reported-by: Tetsuyuki Kobayashi <koba@kmckk.co.jp>
>>> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
>> 
>> I verified on kzm9g.
>> This works with
>> [PATCH] mmc: sh-mmcif: properly handle MMC_WRITE_MULTIPLE_BLOCK 
>> completion IRQ
>> 
>> Tested-by: Tetsuyuki Kobayashi <koba@kmckk.co.jp>
>
> Without this patch, the following Oops occurs. (kzm9g on v3.6-rc7)
> Please push this to v3.6, not only 3.7-next.

I'm traveling from Shanghai to Boston (home) at the moment, so I can't
push this immediately.  I'll either get it into 3.6, or 3.7 with a tag
for 3.6-stable.

Thanks,

- Chris.
-- 
Chris Ball   <cjb@laptop.org>   <http://printf.net/>
One Laptop Per Child