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To:     "Boris Brezillon" <boris.brezillon@collabora.com>
Cc:     bbrezillon@kernel.org, computersforpeace@gmail.com,
        dwmw2@infradead.org, juliensu@mxic.com.tw,
        linux-kernel@vger.kernel.org, linux-mtd@lists.infradead.org,
        marek.vasut@gmail.com, miquel.raynal@bootlin.com, richard@nod.at,
        vigneshr@ti.com
Subject: Re: [PATCH v2 1/4] mtd: rawnand: Add support manufacturer specific lock/unlock
 operatoin
MIME-Version: 1.0
Message-ID: <OF505D0437.0130F15A-ON48258511.002C7F75-48258511.002D4341@mxic.com.tw>
From:   masonccyang@mxic.com.tw
Date:   Mon, 17 Feb 2020 16:14:23 +0800
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Sender: linux-kernel-owner@vger.kernel.org
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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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