Re: [PATCH 04/20] mtd: nand: ecc-bch: Stop exporting the private structure

[Adam Ford <aford173@gmail.com>]

On Tue, Jan 12, 2021 at 10:01 AM Adam Ford <aford173@gmail.com> wrote:
>
> On Tue, Jan 12, 2021 at 8:35 AM Miquel Raynal <miquel.raynal@bootlin.com> wrote:
> >
> > Hi Adam,
> >
> > Miquel Raynal <miquel.raynal@bootlin.com> wrote on Mon, 11 Jan 2021
> > 11:20:27 +0100:
> >
> > > Hi Adam,
> > >
> > > Adam Ford <aford173@gmail.com> wrote on Sat, 9 Jan 2021 08:46:44 -0600:
> > >
> > > > On Tue, Sep 29, 2020 at 6:09 PM Miquel Raynal <miquel.raynal@bootlin.com> wrote:
> > > > >
> > > > > The NAND BCH control structure has nothing to do outside of this
> > > > > driver, all users of the nand_bch_init/free() functions just save it
> > > > > to chip->ecc.priv so do it in this driver directly and return a
> > > > > regular error code instead.
> > > > >
> > > > > Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
> > > > > ---
> > > >
> > > > Starting with this commit:  3c0fe36abebe, the kernel either doesn't
> > > > build or returns errors on some omap2plus devices with the following
> > > > error:
> > > >
> > > >     nand: device found, Manufacturer ID: 0x2c, Chip ID: 0xbc
> > > >     nand: Micron MT29F4G16ABBDA3W
> > > >     nand: 512 MiB, SLC, erase size: 128 KiB, page size: 2048, OOB size: 64
> > > >     nand: using OMAP_ECC_BCH8_CODE_HW_DETECTION_SW
> > > >     Invalid ECC layout
> > > >     omap2-nand 30000000.nand: unable to use BCH library
> > > >     omap2-nand: probe of 30000000.nand failed with error -22
> > > >     8<--- cut here ---
> > > >
> > > > There are few commits using git bisect that have build errors, so it
> > > > wasn't possible for me to determine the exact commit that broke the
> > > > ECC.  If the build failed, I marked it as 'bad' to git bisect.
> > >
> > > I am sorry to hear that, I regularly rebase with a make run between each
> > > pick and push my branches to a 0-day repository to have robots check
> > > for such errors, but sometimes I fail.
> > >
> > > > Newer commits have remedied the build issue, but the Invalid ECC
> > > > layout error still exists as of 5.11-RC2.
> > >
> > > Ok so let's focus on these.
> > >
> > > > Do you have any suggestions on what I can do to remedy this?  I am
> > > > willing to try and test.
> > >
> > > Glad to hear that.
> > >
> > > Can you share the NAND controller DT node you are using?
> > >
> > > Also, can you please add a few printk's like below and give me the
> > > output?
> >
> > Will you have the time to check these soon? I am ready to help and
> > would like to fix it asap.
>
> Sorry for the delay, I have to split my time with 3 different
> projects.  I am hoping to get you data later today.
>
Miquel,

Here is the dump from my boot sequence:

[    2.629089] omap2-nand 30000000.nand: GPIO lookup for consumer rb
[    2.635253] omap2-nand 30000000.nand: using device tree for GPIO lookup
[    2.642150] of_get_named_gpiod_flags: parsed 'rb-gpios' property of node '/o)
[    2.653900] gpio gpiochip6: Persistence not supported for GPIO 0
[    2.660339] nand: device found, Manufacturer ID: 0x2c, Chip ID: 0xbc
[    2.666900] nand: Micron MT29F4G16ABBDA3W
[    2.670959] nand: 512 MiB, SLC, erase size: 128 KiB, page size: 2048, OOB si4
[    2.678710] nand: using OMAP_ECC_BCH8_CODE_HW_DETECTION_SW
[    2.684234] writesize 2048, step_size 512, nsteps 4
[    2.689300] strength 8, step size 512, code_size 13
[    2.696807] count eccbytes 0
[    2.699707] Invalid ECC layout
[    2.702789] omap2-nand 30000000.nand: unable to use BCH library
[    2.709014] omap2-nand: probe of 30000000.nand failed with error -22
[    2.722656] 8<--- cut here ---

Let me know if/what else you want me to try.

adam

> adam
> >
> > Cheers,
> > Miquèl

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