Re: [U-Boot] NAND ECC Error with wrong SMC ording bug

Hi Stefan:

We had a board with high number of correctable ECC errors. Which crashed 
the jffs when it
was miss correcting the wrong byte location.

Do you want me to submit a patch for this, or do you prefer to do it. I 
am submitting a patch
for linux right now.

Feng Kan
AMCC Software

On 08/19/2009 10:01 PM, Stefan Roese wrote:

On Thursday 20 August 2009 06:38:51 Sean MacLennan wrote:
   

quoted

quoted

I see other boards using SMC as well, can someone comment on the
change I am proposing.
Should I change the correction algorithm or the calculate function?
If the later is preferred
it would mean the change must be pushed in both U-Boot and Linux.
       

Odds are the calculate function is wrong. The correction algo is used
by many nand drivers, I *assume* it is correct. The calculate function
was set to agree with u-boot (1.3.0).
     

Yes, it seems that you changed the order in the calculation function while
reworking the NDFC driver for arch/powerpc. So we should probably change this
order back to the original version. And change it in U-Boot as well.

BTW: I didn't see any problems with ECC so far with the current code. Feng,
how did you spot this problem?

Cheers,
Stefan

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