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

[Miquel Raynal]

Hi Adam,

Miquel Raynal <miquel.raynal at bootlin.com> wrote on Mon, 11 Jan 2021
11:20:27 +0100:

> Hi Adam,
> 
> Adam Ford <aford173 at 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 at 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 at 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.

Cheers,
Miquèl