Re: [PATCH 0/2] Fix double counting of S/W ECC engines' ECC stat

From: ycllin
Date: Wed May 12 2021 - 22:11:48 EST



> "Miquel Raynal" <miquel.raynal@xxxxxxxxxxx>
<deleted>
>
> Good catch!
>
> However I don't think the current fix is valid because these engines
> are meant to be used by the raw NAND core as well, I propose something
> like the below, can you please tell me if it works as expected? (not
> even build tested)
>
> Thanks,
> Miquèl
>
>
<deleted>

Thanks for your work.

I tested the two patches(yours and mine) separately in our environment:
1) MXIC NFC(&raw NAND),2) MXIC SPI host(&SPI-NAND) with S/W BCH engine.
Both patches are valid(using nandtest/nandbiterrs, values of ecc_stats are
normal).

This seems to be because the function(nand_ecc_sw_bch_finish_io_req()
in ecc-sw-bch.c) that would increase the ecc_stats counter is not used
in the raw NAND world. Am I misunderstanding or is it platform dependency?

BTW, I think your modification should be more in line with the design
spirit
of generic ECC engine framework.

Thanks,
YouChing

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