Re: mtd_nandbiterrs errors

[Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>]

On Wed, 5 Feb 2020 22:28:50 +1100
JH <jupiter.hce@xxxxxxxxx> wrote:

> Resolved, using kernel test probably a bad idea, change to use
> mtd-utils nandbiterrs resolved issue.

I doubt it solved the real problem: ECC is not working properly.

> > [  695.257984] mtd_nandbiterrs: Inserted biterror @ 0/0
> > [  695.262984] mtd_nandbiterrs: rewrite page
> > [  695.273646] mtd_nandbiterrs: read_page
> > [  695.280000] mtd_nandbiterrs: Read reported 2 corrected bit errors

The ECC engine should report an uncorrectable error here, not 2
corrected bits. BTW, an ECC of 2bits/512bytes sounds weak for a 2k-page
NAND. What's the NAND part you're testing with?

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