[stable] [PATCH RESEND] omap : nand : fix subpage ecc issue with prefetch

[Kishore Kadiyala]

On Wed, May 11, 2011 at 8:24 PM, Greg KH <greg at kroah.com> wrote:
> On Wed, May 11, 2011 at 07:54:57PM +0530, Kishore Kadiyala wrote:
>> When reading/writing a subpage (When HW ECC is not available/enabled)
>> for number of bytes not aligned to 4, the mis-aligned bytes are handled
>> first (by cpu copy method) before enabling the Prefetch engine to/from
>> 'p'(start of buffer 'buf'). Then it reads/writes rest of the bytes with
>> the help of Prefetch engine, if available, or again using cpu copy method.
>> Currently, reading/writing of rest of bytes, is not done correctly since
>> its trying to read/write again to/from begining of buffer 'buf',
>> overwriting the mis-aligned bytes.
>>
>> Read & write using prefetch engine got broken in commit '2c01946c'.
>> We never hit a scenario of not getting 'gpmc_prefetch_enable' call
>> success. So, problem did not get caught up.
>>
>> Signed-off-by: Kishore Kadiyala <kishore.kadiyala at ti.com>
>> Signed-off-by: Vimal Singh <vimal.newwork at gmail.com>
>> Reported-by: Bryan DE FARIA <bdefaria at adeneo-embedded.com>
>> ---
>>  drivers/mtd/nand/omap2.c |   12 +++++-------
>>  1 files changed, 5 insertions(+), 7 deletions(-)
>
>
> <formletter>
>
> This is not the correct way to submit patches for inclusion in the
> stable kernel tree.  Please read Documentation/stable_kernel_rules.txt
> for how to do this properly.

Ok, will post it properly.

Regards,
Kishore
>
> </formletter>
>
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