Re: [PATCH] mtd: spinand: Add support for GigaDevice GD5F1GQ4UC

[Boris Brezillon <bbrezillon@xxxxxxxxxx>]

On Thu, 24 Jan 2019 08:35:32 +0100
Stefan Roese <sr@xxxxxxx> wrote:

> On 23.01.19 13:57, Boris Brezillon wrote:
> > On Wed, 23 Jan 2019 13:40:50 +0100
> > Boris Brezillon <bbrezillon@xxxxxxxxxx> wrote:
> >   
> >>> This definitely does look better. I assume that we are we on the
> >>> right track now?  
> >>
> >> Yep, and it confirms the ECC caps => 8bits/512bytes. Will send a proper
> >> commit for the fix I did and Cc you so you can add your
> >> Tested-by/Reviewed-by.  
> > 
> > Oh, looks like a side-effect of migrating to the dirmap approach
> > (merged in nand/next [1]) is that this bug does not exist. Can you test
> > the nand/next branch and let me know if it still works?
> > 
> > [1]http://git.infradead.org/linux-mtd.git/shortlog/refs/heads/nand/next  
> 
> Unfortunately this does not seem to work. I was unable to boot my
> platform from this branch directly so I rebased all MTD/NAND related
> patches on top of the latest kernel.org tree for this.

You mean linux-next?

> Here a log
> with this version (new error this time):
> 
> root@mt7688:~# ./nandbiterrs /dev/mtd5 -i
> incremental biterrors test
> libmtd: error!: cannot write 2048 bytes to mtd5 (eraseblock 0, offset 0)
>          error 5 (Input/output error)
> Failed to write page 0 in block 0
> 
> Here a log with nandwrite errors:
> 
> root@mt7688:~# flash_erase /dev/mtd5 0 1
> Erasing 128 Kibyte @ 0 -- 100 % complete
> root@mt7688:~# nandwrite --input-size=2048 /dev/mtd5 /dev/urandom
> Writing data to block 0 at offset 0x0
> libmtd: error!: cannot write 2048 bytes to mtd5 (eraseblock 0, offset 0)
>          error 5 (Input/output error)
> Erasing failed write from 00000000 to 0x01ffff

Weird, I wasn't expecting ERASE to fail (nothing changed in the erase
path).

> Writing data to block 1 at offset 0x20000
> libmtd: error!: cannot write 2048 bytes to mtd5 (eraseblock 1, offset 0)
>          error 5 (Input/output error)
> Erasing failed write from 0x020000 to 0x03ffff
> Writing data to block 2 at offset 0x40000
> libmtd: error!: cannot write 2048 bytes to mtd5 (eraseblock 2, offset 0)
>          error 5 (Input/output error)
> Erasing failed write from 0x040000 to 0x05ffff
> ...
> 
> Any ideas on this?

Try to revert b47b307ac23d ("mtd: spinand: Use the spi-mem dirmap API").

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