Re: [PATCH v2 1/4] mtd: rawnand: Add support manufacturer specific lock/unlock operatoin

From: masonccyang
Date: Mon Feb 17 2020 - 03:14:36 EST



Hi Boris,

>
> > /* Set default functions */
> > static void nand_set_defaults(struct nand_chip *chip)
> > {
> > @@ -5782,8 +5810,8 @@ static int nand_scan_tail(struct nand_chip
*chip)
> > mtd->_read_oob = nand_read_oob;
> > mtd->_write_oob = nand_write_oob;
> > mtd->_sync = nand_sync;
> > - mtd->_lock = NULL;
> > - mtd->_unlock = NULL;
> > + mtd->_lock = nand_lock;
> > + mtd->_unlock = nand_unlock;
> > mtd->_suspend = nand_suspend;
> > mtd->_resume = nand_resume;
> > mtd->_reboot = nand_shutdown;
> > diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
> > index 4ab9bcc..2430ecd 100644
> > --- a/include/linux/mtd/rawnand.h
> > +++ b/include/linux/mtd/rawnand.h
> > @@ -1136,6 +1136,9 @@ struct nand_chip {
> > const struct nand_manufacturer *desc;
> > void *priv;
> > } manufacturer;
> > +
> > + int (*_lock)(struct nand_chip *chip, loff_t ofs, uint64_t len);
> > + int (*_unlock)(struct nand_chip *chip, loff_t ofs, uint64_t len);
>
> Please drop this _ prefix.

Drop _ prefix of _lock will get compile error due to there is already
defined "struct mutex lock" in struct nand_chip.

What about keep this _ prefix or patch it to blocklock/blockunlock,
i.e.,
int (*blocklock)(struct nand_chip *chip, loff_t ofs, uint64_t len);
int (*blockunlock)(struct nand_chip *chip, loff_t ofs, uint64_t len);


thanks for your time & comments.
Mason


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