From: "Álvaro Fernández Rojas" <noltari@gmail.com>
To: Florian Fainelli <f.fainelli@gmail.com>
Cc: vigneshr@ti.com, kdasu.kdev@gmail.com, richard@nod.at,
linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
linaro-mm-sig@lists.linaro.org, linux-mtd@lists.infradead.org,
miquel.raynal@bootlin.com, bcm-kernel-feedback-list@broadcom.com,
computersforpeace@gmail.com, linux-media@vger.kernel.org
Subject: Re: [PATCH] nand: brcmnand: correctly verify erased pages
Date: Tue, 5 May 2020 10:24:46 +0200 [thread overview]
Message-ID: <FFE6FE5C-4FE0-49B6-AD36-CEF344015283@gmail.com> (raw)
In-Reply-To: <2fea8057-8b84-790e-60ba-b6848a186e18@gmail.com>
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Hi Florian,
I added it on v2.
Best regards,
Álvaro.
> El 4 may 2020, a las 23:43, Florian Fainelli <f.fainelli@gmail.com> escribió:
>
>
>
> On 5/4/2020 2:29 AM, Álvaro Fernández Rojas wrote:
>> The current code checks that the whole OOB area is erased.
>> This is a problem when JFFS2 cleanmarkers are added to the OOB, since it will
>> fail due to the usable OOB bytes not being 0xff.
>> Correct this by only checking that the ECC aren't 0xff.
>>
>> Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com <mailto:noltari@gmail.com>>
>
> Can you provide a Fixes: tag for this change?
>
>> ---
>> drivers/mtd/nand/raw/brcmnand/brcmnand.c | 22 ++++++++++++++++++----
>> 1 file changed, 18 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c b/drivers/mtd/nand/raw/brcmnand/brcmnand.c
>> index e4e3ceeac38f..546f0807b887 100644
>> --- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c
>> +++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c
>> @@ -2018,6 +2018,7 @@ static int brcmnand_read_by_pio(struct mtd_info *mtd, struct nand_chip *chip,
>> static int brcmstb_nand_verify_erased_page(struct mtd_info *mtd,
>> struct nand_chip *chip, void *buf, u64 addr)
>> {
>> + struct mtd_oob_region oobecc;
>> int i, sas;
>> void *oob = chip->oob_poi;
>> int bitflips = 0;
>> @@ -2035,11 +2036,24 @@ static int brcmstb_nand_verify_erased_page(struct mtd_info *mtd,
>> if (ret)
>> return ret;
>>
>> - for (i = 0; i < chip->ecc.steps; i++, oob += sas) {
>> + for (i = 0; i < chip->ecc.steps; i++) {
>> ecc_chunk = buf + chip->ecc.size * i;
>> - ret = nand_check_erased_ecc_chunk(ecc_chunk,
>> - chip->ecc.size,
>> - oob, sas, NULL, 0,
>> +
>> + ret = nand_check_erased_ecc_chunk(ecc_chunk, chip->ecc.size,
>> + NULL, 0, NULL, 0,
>> + chip->ecc.strength);
>> + if (ret < 0)
>> + return ret;
>> +
>> + bitflips = max(bitflips, ret);
>> + }
>> +
>> + for (i = 0; mtd->ooblayout->ecc(mtd, i, &oobecc) != -ERANGE; i++)
>> + {
>> + ret = nand_check_erased_ecc_chunk(NULL, 0,
>> + oob + oobecc.offset,
>> + oobecc.length,
>> + NULL, 0,
>> chip->ecc.strength);
>> if (ret < 0)
>> return ret;
>>
>
> --
> Florian
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next prev parent reply other threads:[~2020-05-06 7:02 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-04 9:29 [PATCH] nand: brcmnand: correctly verify erased pages Álvaro Fernández Rojas
2020-05-04 21:43 ` Florian Fainelli
2020-05-05 8:24 ` Álvaro Fernández Rojas [this message]
2020-05-05 8:20 ` [PATCH v2] " Álvaro Fernández Rojas
2020-05-12 6:51 ` [PATCH v3] mtd: rawnand: " Álvaro Fernández Rojas
2020-05-12 7:16 ` Miquel Raynal
2020-05-12 7:24 ` Álvaro Fernández Rojas
2020-05-12 7:34 ` Miquel Raynal
2020-05-12 8:24 ` Álvaro Fernández Rojas
2020-05-12 8:24 ` [PATCH v4] " Álvaro Fernández Rojas
2020-05-24 19:16 ` Miquel Raynal
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