Hi Jiri,
>From: Jiri Slaby [mailto:[email protected]]
>
>From: Pekon Gupta <[email protected]>
>
>This patch does NOT apply to the 3.12 stable tree. If you still want
>it applied, please provide a backport.
>
>===============
>
>commit eae39cb4934d3daab3ec828c5201c955b2e56af9 upstream.
>
>Fixes: commit a919e51161b58ed7e6e663daba99ab7d558808f3
> mtd: nand: omap2: clean-up BCHx_HW and BCHx_SW ECC configurations in
> device_probe
>
>Fixes ecclayout mismatch introduced in above commit for following ecc-schemes:
> - OMAP_ECC_BCH4_CODE_HW_DETECTION_SW
> - OMAP_ECC_BCH8_CODE_HW_DETECTION_SW
> However, this patch also touches other ecc-schemes as the fix required
> refactoring common code, into ecc-scheme specific code.
>
>This patch aligns ecc-layout for below ecc-schemes as per reference [1],[2],[3]
>
> +---+------------+-------------++-------------+-------------+
> |OOB|BCH8_CODE_HW|BCH8_CODE_HW_||HAM1_CODE_HW |HAM1_CODE_HW |
> |pos| | DETECTION_SW||(x8 device) |(x16 device) |
> +---+------------+-------------++-------------+-------------+
> | 0 |BADBLK_MARK | BADBLK_MARK || BADBLK_MARK | BADBLK_MARK |
> | 1 |BADBLK_MARK | BADBLK_MARK || eccpos[0] | BADBLK_MARK |
> | 2 | eccpos[0] | eccpos[0] || eccpos[1] | eccpos[0] |
> | 3 | eccpos[1] | eccpos[1] || eccpos[2] | eccpos[1] |
> | 4 | eccpos[2] | eccpos[2] || eccpos[3] | eccpos[2] |
> | 5 | eccpos[3] | eccpos[3] || eccpos[4] | eccpos[3] |
> | 6 | eccpos[4] | eccpos[4] || eccpos[5] | eccpos[4] |
> | 7 | eccpos[5] | eccpos[5] || eccpos[6] | eccpos[5] |
> | 8 | eccpos[6] | eccpos[6] || eccpos[7] | eccpos[6] |
> | 9 | eccpos[7] | eccpos[7] || eccpos[8] | eccpos[7] |
> |10 | eccpos[8] | eccpos[8] || eccpos[9] | eccpos[8] |
> |11 | eccpos[9] | eccpos[9] || eccpos[10] | eccpos[9] |
> |12 | eccpos[10] | eccpos[10] || eccpos[11] | eccpos[10] |
> |13 | eccpos[11] | eccpos[11] || oobfree[0] | eccpos[11] |
> |14 | eccpos[12] | eccpos[12] || oobfree[1] | oobfree[0] |
> |15 | eccpos[13] | <reserved> || oobfree[2] | oobfree[1] |
> +---+------------+-------------++-------------+-------------+
> |16 | eccpos[14] | eccpos[13] || oobfree[3] | oobfree[2] |
> |...| [...] | [...] || [...] | [...] |
> |56 | eccpos[54] | eccpos[51] || oobfree[43] | oobfree[42] |
> |57 | eccpos[55] | <reserved> || oobfree[44] | oobfree[43] |
> +===+============+=============+==============+=============+
> |58 | oobfree[0] | oobfree[0] || oobfree[45] | oobfree[44] |
> |59 | oobfree[1] | oobfree[1] || oobfree[46] | oobfree[45] |
> |60 | oobfree[2] | oobfree[2] || oobfree[47] | oobfree[46] |
> |61 | oobfree[3] | oobfree[3] || oobfree[48] | oobfree[47] |
> |62 | oobfree[4] | oobfree[4] || oobfree[49] | oobfree[48] |
> |63 | oobfree[5] | oobfree[5] || oobfree[50] | oobfree[49] |
> +---+------------+-------------+--------------+-------------+
>
>[1] ecc-layout expected by ROM code, as specified in SoC TRM under:
> Chapter="Initialization"
> Section="Device Initialization by ROM code"
> Sub-Section="Memory Booting"
> Heading="NAND"
> Figure="ECC Locations in NAND Spare Areas"
>
>[2] ecc-layout updates in u-boot
> http://lists.denx.de/pipermail/u-boot/2013-November/167551.html
>
>[3] u-boot configurations to match above ecc-layout are documented at
> https://processors.wiki.ti.com/index.php/Linux_Core_NAND_User%27s_Guide
>
>CC: <[email protected]> # 3.13.x+
>
The mentioned patches fix the regression introduced in 3.13.x+
These are not intended for 3.12 or previous kernel versions.
So, please ignore them.
Same applies to other below patches..
[PATCH] mtd: nand: omap: fix ecclayout->oobfree->length
[PATCH] mtd: nand: omap: fix ecclayout->oobfree->offset
with regards, pekon
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