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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org Hi Boris, > -----Original Message----- > From: Boris Brezillon > Sent: Wednesday, June 26, 2019 12:18 PM > To: Naga Sureshkumar Relli > Cc: miquel.raynal@bootlin.com; helmut.grohne@intenta.de; richard@nod.at; > dwmw2@infradead.org; computersforpeace@gmail.com; marek.vasut@gmail.com; > vigneshr@ti.com; bbrezillon@kernel.org; yamada.masahiro@socionext.com; linux- > mtd@lists.infradead.org; linux-kernel@vger.kernel.org > Subject: Re: [LINUX PATCH v17 1/2] mtd: rawnand: nand_micron: Do not over write > driver's read_page()/write_page() > > On Mon, 24 Jun 2019 22:46:29 -0600 > Naga Sureshkumar Relli wrote: > > > Add check before assigning chip->ecc.read_page() and > > chip->ecc.write_page() > > > > Signed-off-by: Naga Sureshkumar Relli > > > > --- > > drivers/mtd/nand/raw/nand_micron.c | 7 +++++-- > > 1 file changed, 5 insertions(+), 2 deletions(-) > > > > diff --git a/drivers/mtd/nand/raw/nand_micron.c > > b/drivers/mtd/nand/raw/nand_micron.c > > index cbd4f09ac178..565f2696c747 100644 > > --- a/drivers/mtd/nand/raw/nand_micron.c > > +++ b/drivers/mtd/nand/raw/nand_micron.c > > @@ -500,8 +500,11 @@ static int micron_nand_init(struct nand_chip *chip) > > chip->ecc.size = 512; > > chip->ecc.strength = chip->base.eccreq.strength; > > chip->ecc.algo = NAND_ECC_BCH; > > - chip->ecc.read_page = micron_nand_read_page_on_die_ecc; > > - chip->ecc.write_page = micron_nand_write_page_on_die_ecc; > > + if (!chip->ecc.read_page) > > + chip->ecc.read_page = micron_nand_read_page_on_die_ecc; > > + > > + if (!chip->ecc.write_page) > > + chip->ecc.write_page = micron_nand_write_page_on_die_ecc; > > That's wrong, if you don't want on-die ECC to be used, simply don't set nand-ecc-mode to "on- > die". Ok. But if we want to use on-die ECC then you mean to say it is mandatory to use micron_nand_read/write_page_on_die_ecc()? Regards, Naga Sureshkumar Relli > > > > > if (ondie == MICRON_ON_DIE_MANDATORY) { > > chip->ecc.read_page_raw = nand_read_page_raw_notsupp; ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/