mtd_nandbiterrs errors

[JH <jupiter.hce@xxxxxxxxx>]

Hi,

I am running kernel version 4.19.75 on iMX6, here I got problem to run
mtd_nandbiterrs:

# modprobe mtd_nandbiterrs
[  695.090585]
[  695.092143] ==================================================
[  695.098317] mtd_nandbiterrs: MTD device: 0
[  695.114256] mtd_nandbiterrs: MTD device size 1048576, eraseblock=131072, pag4
[  695.122867] mtd_nandbiterrs: Device uses 1 subpages of 2048 bytes
[  695.129138] mtd_nandbiterrs: Using page=0, offset=0, eraseblock=0
[  695.144888] mtd_nandbiterrs: incremental biterrors test
[  695.150594] mtd_nandbiterrs: write_page
[  695.158629] mtd_nandbiterrs: rewrite page
[  695.163488] mtd_nandbiterrs: read_page
[  695.170790] mtd_nandbiterrs: verify_page
[  695.174887] mtd_nandbiterrs: Successfully corrected 0 bit errors per subpage
[  695.182279] mtd_nandbiterrs: Inserted biterror @ 0/5
[  695.187387] mtd_nandbiterrs: rewrite page
[  695.196243] mtd_nandbiterrs: read_page
[  695.202608] mtd_nandbiterrs: Read reported 1 corrected bit errors
[  695.209115] mtd_nandbiterrs: verify_page
[  695.213192] mtd_nandbiterrs: Successfully corrected 1 bit errors per subpage
[  695.220361] mtd_nandbiterrs: Inserted biterror @ 0/2
[  695.225361] mtd_nandbiterrs: rewrite page
[  695.235261] mtd_nandbiterrs: read_page
[  695.240237] mtd_nandbiterrs: Read reported 2 corrected bit errors
[  695.246384] mtd_nandbiterrs: verify_page
[  695.250771] mtd_nandbiterrs: Successfully corrected 2 bit errors per subpage
[  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
[  695.286230] mtd_nandbiterrs: verify_page
[  695.290489] mtd_nandbiterrs: Error: page offset 0, expected 25, got 00
[  695.297155] mtd_nandbiterrs: Error: page offset 282, expected 29, got 28
[  695.303897] mtd_nandbiterrs: Error: page offset 359, expected a7, got 27
[  695.310834] mtd_nandbiterrs: ECC failure, read data is incorrect despite reas
modprobe: ERROR: could not insert 'mtd_nandbiterrs': Input/output error

What I got wrong here?

Thank you.

Kind regards,

- jh

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