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SubjectRe: [PATCH v4 2/7] mtd: onenand: Store bad block marker position in chip struct
Hi Frieder,

Schrempf Frieder <frieder.schrempf@kontron.de> wrote on Thu, 21 Mar
2019 08:47:52 +0000:

> On 04.03.19 11:58, Miquel Raynal wrote:
> > Hi Frieder,
> >
> > Schrempf Frieder <frieder.schrempf@kontron.de> wrote on Mon, 18 Feb
> > 2019 10:42:41 +0000:
> >
> >> From: Frieder Schrempf <frieder.schrempf@kontron.de>
> >>
> >> The information about where the manufacturer puts the bad block
> >> markers inside the bad block and in the OOB data is stored in
> >> different places. Let's move this information to the chip struct,
> >> as we did it for rawnand.
> >>
> >> Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
> >> ---
> >> drivers/mtd/nand/onenand/onenand_base.c | 5 ++++-
> >> drivers/mtd/nand/onenand/onenand_bbt.c | 3 ---
> >> include/linux/mtd/onenand.h | 3 +++
> >> 3 files changed, 7 insertions(+), 4 deletions(-)
> >>
> >> diff --git a/drivers/mtd/nand/onenand/onenand_base.c b/drivers/mtd/nand/onenand/onenand_base.c
> >> index 4ca4b194e7d7..f41d76248550 100644
> >> --- a/drivers/mtd/nand/onenand/onenand_base.c
> >> +++ b/drivers/mtd/nand/onenand/onenand_base.c
> >> @@ -2458,7 +2458,7 @@ static int onenand_default_block_markbad(struct mtd_info *mtd, loff_t ofs)
> >> bbm->bbt[block >> 2] |= 0x01 << ((block & 0x03) << 1);
> >>
> >> /* We write two bytes, so we don't have to mess with 16-bit access */
> >> - ofs += mtd->oobsize + (bbm->badblockpos & ~0x01);
> >> + ofs += mtd->oobsize + (this->badblockpos & ~0x01);
> >> /* FIXME : What to do when marking SLC block in partition
> >> * with MLC erasesize? For now, it is not advisable to
> >> * create partitions containing both SLC and MLC regions.
> >> @@ -3967,6 +3967,9 @@ int onenand_scan(struct mtd_info *mtd, int maxchips)
> >> if (!(this->options & ONENAND_SKIP_INITIAL_UNLOCKING))
> >> this->unlock_all(mtd);
> >>
> >> + /* Set the bad block marker position */
> >> + this->badblockpos = ONENAND_BADBLOCK_POS;
> >> +
> >> ret = this->scan_bbt(mtd);
> >> if ((!FLEXONENAND(this)) || ret)
> >> return ret;
> >> diff --git a/drivers/mtd/nand/onenand/onenand_bbt.c b/drivers/mtd/nand/onenand/onenand_bbt.c
> >> index dde20487937d..57c31c81be18 100644
> >> --- a/drivers/mtd/nand/onenand/onenand_bbt.c
> >> +++ b/drivers/mtd/nand/onenand/onenand_bbt.c
> >> @@ -190,9 +190,6 @@ static int onenand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd)
> >> if (!bbm->bbt)
> >> return -ENOMEM;
> >>
> >> - /* Set the bad block position */
> >> - bbm->badblockpos = ONENAND_BADBLOCK_POS;
> >> -
> >> /* Set erase shift */
> >> bbm->bbt_erase_shift = this->erase_shift;
> >>
> >> diff --git a/include/linux/mtd/onenand.h b/include/linux/mtd/onenand.h
> >> index 0aaa98b219a4..e03aea7f7e61 100644
> >> --- a/include/linux/mtd/onenand.h
> >> +++ b/include/linux/mtd/onenand.h
> >> @@ -94,6 +94,7 @@ struct onenand_chip {
> >> unsigned int technology;
> >> unsigned int density_mask;
> >> unsigned int options;
> >> + int badblockpos;
> >
> > Any reason not to unsign this field?
>
> It was signed so far, but you're right that it makes more sense to
> unsign it.

With this addressed please add my:

Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>

Thanks,
Miquèl

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