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From: Miquel Raynal <miquel.raynal@bootlin.com>
To: Piotr Sroka <piotrs@cadence.com>
Cc: Vignesh Raghavendra <vigneshr@ti.com>,
	Richard Weinberger <richard@nod.at>,
	linux-kernel@vger.kernel.org, Marek Vasut <marek.vasut@gmail.com>,
	linux-mtd@lists.infradead.org,
	Brian Norris <computersforpeace@gmail.com>,
	David Woodhouse <dwmw2@infradead.org>,
	Kazuhiro Kasai <kasai.kazuhiro@socionext.com>
Subject: Re: [PATCH 2/4] mtd: rawnand: cadence: fix calculating avaialble oob size
Date: Tue, 18 Feb 2020 11:45:53 +0100	[thread overview]
Message-ID: <20200218114537.723436b3@xps13> (raw)
In-Reply-To: <1581328530-29966-2-git-send-email-piotrs@cadence.com>

Hi Piotr,

Piotr Sroka <piotrs@cadence.com> wrote on Mon, 10 Feb 2020 10:55:26
+0100:

There is a typo in the title (available).

> Previously ecc_sector size was used for calculation but its value
> was not yet known.

Can we rework a little bit this? What about:

	The value of cdns_chip->sector_count is not known at the moment
	of the derivation of ecc_size, leading to a zero value. Fix
	this by assigning ecc_size later in the code.

Also, I think it deserves a Fixes/Cc:stable tag!

> 
> Signed-off-by: Piotr Sroka <piotrs@cadence.com>
> ---
>  drivers/mtd/nand/raw/cadence-nand-controller.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/mtd/nand/raw/cadence-nand-controller.c b/drivers/mtd/nand/raw/cadence-nand-controller.c
> index 5063a8b493a4..2ebfd0934739 100644
> --- a/drivers/mtd/nand/raw/cadence-nand-controller.c
> +++ b/drivers/mtd/nand/raw/cadence-nand-controller.c
> @@ -2595,7 +2595,7 @@ int cadence_nand_attach_chip(struct nand_chip *chip)
>  {
>  	struct cdns_nand_ctrl *cdns_ctrl = to_cdns_nand_ctrl(chip->controller);
>  	struct cdns_nand_chip *cdns_chip = to_cdns_nand_chip(chip);
> -	u32 ecc_size = cdns_chip->sector_count * chip->ecc.bytes;
> +	u32 ecc_size;
>  	struct mtd_info *mtd = nand_to_mtd(chip);
>  	int ret;
>  
> @@ -2634,6 +2634,7 @@ int cadence_nand_attach_chip(struct nand_chip *chip)
>  	/* Error correction configuration. */
>  	cdns_chip->sector_size = chip->ecc.size;
>  	cdns_chip->sector_count = mtd->writesize / cdns_chip->sector_size;
> +	ecc_size = cdns_chip->sector_count * chip->ecc.bytes;
>  
>  	cdns_chip->avail_oob_size = mtd->oobsize - ecc_size;
>  

Thanks,
Miquèl

______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

WARNING: multiple messages have this Message-ID (diff)
From: Miquel Raynal <miquel.raynal@bootlin.com>
To: Piotr Sroka <piotrs@cadence.com>
Cc: Kazuhiro Kasai <kasai.kazuhiro@socionext.com>,
	Richard Weinberger <richard@nod.at>,
	David Woodhouse <dwmw2@infradead.org>,
	Brian Norris <computersforpeace@gmail.com>,
	Marek Vasut <marek.vasut@gmail.com>,
	Vignesh Raghavendra <vigneshr@ti.com>,
	<linux-mtd@lists.infradead.org>, <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 2/4] mtd: rawnand: cadence: fix calculating avaialble oob size
Date: Tue, 18 Feb 2020 11:45:53 +0100	[thread overview]
Message-ID: <20200218114537.723436b3@xps13> (raw)
In-Reply-To: <1581328530-29966-2-git-send-email-piotrs@cadence.com>

Hi Piotr,

Piotr Sroka <piotrs@cadence.com> wrote on Mon, 10 Feb 2020 10:55:26
+0100:

There is a typo in the title (available).

> Previously ecc_sector size was used for calculation but its value
> was not yet known.

Can we rework a little bit this? What about:

	The value of cdns_chip->sector_count is not known at the moment
	of the derivation of ecc_size, leading to a zero value. Fix
	this by assigning ecc_size later in the code.

Also, I think it deserves a Fixes/Cc:stable tag!

> 
> Signed-off-by: Piotr Sroka <piotrs@cadence.com>
> ---
>  drivers/mtd/nand/raw/cadence-nand-controller.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/mtd/nand/raw/cadence-nand-controller.c b/drivers/mtd/nand/raw/cadence-nand-controller.c
> index 5063a8b493a4..2ebfd0934739 100644
> --- a/drivers/mtd/nand/raw/cadence-nand-controller.c
> +++ b/drivers/mtd/nand/raw/cadence-nand-controller.c
> @@ -2595,7 +2595,7 @@ int cadence_nand_attach_chip(struct nand_chip *chip)
>  {
>  	struct cdns_nand_ctrl *cdns_ctrl = to_cdns_nand_ctrl(chip->controller);
>  	struct cdns_nand_chip *cdns_chip = to_cdns_nand_chip(chip);
> -	u32 ecc_size = cdns_chip->sector_count * chip->ecc.bytes;
> +	u32 ecc_size;
>  	struct mtd_info *mtd = nand_to_mtd(chip);
>  	int ret;
>  
> @@ -2634,6 +2634,7 @@ int cadence_nand_attach_chip(struct nand_chip *chip)
>  	/* Error correction configuration. */
>  	cdns_chip->sector_size = chip->ecc.size;
>  	cdns_chip->sector_count = mtd->writesize / cdns_chip->sector_size;
> +	ecc_size = cdns_chip->sector_count * chip->ecc.bytes;
>  
>  	cdns_chip->avail_oob_size = mtd->oobsize - ecc_size;
>  

Thanks,
Miquèl

  reply	other threads:[~2020-02-18 10:46 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-10  9:55 [PATCH 1/4] mtd: rawnand: cadence: get meta data size from registers Piotr Sroka
2020-02-10  9:55 ` Piotr Sroka
2020-02-10  9:55 ` [PATCH 2/4] mtd: rawnand: cadence: fix calculating avaialble oob size Piotr Sroka
2020-02-10  9:55   ` Piotr Sroka
2020-02-18 10:45   ` Miquel Raynal [this message]
2020-02-18 10:45     ` Miquel Raynal
2020-03-10 18:29   ` Miquel Raynal
2020-03-10 18:29     ` Miquel Raynal
2020-03-11  7:17     ` Miquel Raynal
2020-03-11  7:17       ` Miquel Raynal
2020-02-10  9:55 ` [PATCH 3/4] mtd: rawnand: cadence: change bad block marker size Piotr Sroka
2020-02-10  9:55   ` Piotr Sroka
2020-02-18 10:47   ` Miquel Raynal
2020-02-18 10:47     ` Miquel Raynal
2020-03-10 18:29   ` Miquel Raynal
2020-03-10 18:29     ` Miquel Raynal
2020-02-10  9:55 ` [PATCH 4/4] mtd: rawnand: cadence: reinit complete before execute command Piotr Sroka
2020-02-10  9:55   ` Piotr Sroka
2020-02-18 10:48   ` Miquel Raynal
2020-02-18 10:48     ` Miquel Raynal
2020-03-10 18:29   ` Miquel Raynal
2020-03-10 18:29     ` Miquel Raynal
2020-03-10 18:29 ` [PATCH 1/4] mtd: rawnand: cadence: get meta data size from registers Miquel Raynal
2020-03-10 18:29   ` Miquel Raynal

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