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From: Boris Brezillon <boris.brezillon@collabora.com>
To: Miquel Raynal <miquel.raynal@bootlin.com>
Cc: Michal Simek <monstr@monstr.eu>,
	Vignesh Raghavendra <vigneshr@ti.com>,
	Tudor Ambarus <Tudor.Ambarus@microchip.com>,
	Richard Weinberger <richard@nod.at>,
	linux-mtd@lists.infradead.org,
	Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
	Naga Sureshkumar Relli <nagasure@xilinx.com>
Subject: Re: [PATCH 3/8] mtd: rawnand: onfi: Fix redundancy detection check
Date: Wed, 22 Apr 2020 08:49:52 +0200	[thread overview]
Message-ID: <20200422084952.5018f600@collabora.com> (raw)
In-Reply-To: <20200421164637.8086-4-miquel.raynal@bootlin.com>

On Tue, 21 Apr 2020 18:46:32 +0200
Miquel Raynal <miquel.raynal@bootlin.com> wrote:

> During ONFI detection, the CRC derived from the parameter page and the
> CRC supposed to be at the end of the parameter page are compared. If
> they do not match, the second then the third copies of the page are
> tried.
> 
> The current implementation compares the newly derived CRC with the CRC
> contained in the first page only. So if this particular CRC area has
> been corrupted, then the detection will fail for a wrong reason.
> 
> Fix this issue by checking the derived CRC against the right one.
> 
> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>

> ---
>  drivers/mtd/nand/raw/nand_onfi.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/mtd/nand/raw/nand_onfi.c b/drivers/mtd/nand/raw/nand_onfi.c
> index 0b879bd0a68c..8fe8d7bdd203 100644
> --- a/drivers/mtd/nand/raw/nand_onfi.c
> +++ b/drivers/mtd/nand/raw/nand_onfi.c
> @@ -173,7 +173,7 @@ int nand_onfi_detect(struct nand_chip *chip)
>  		}
>  
>  		if (onfi_crc16(ONFI_CRC_BASE, (u8 *)&p[i], 254) ==
> -				le16_to_cpu(p->crc)) {
> +		    le16_to_cpu(p[i].crc)) {
>  			if (i)
>  				memcpy(p, &p[i], sizeof(*p));
>  			break;


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  reply	other threads:[~2020-04-22  6:50 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-21 16:46 [PATCH 0/8] Misc timing changes Miquel Raynal
2020-04-21 16:46 ` [PATCH 1/8] mtd: rawnand: timings: Add mode information to the timings structure Miquel Raynal
2020-04-22  6:36   ` Boris Brezillon
2020-04-21 16:46 ` [PATCH 2/8] mtd: rawnand: timings: Fix default tR_max and tCCS_min timings Miquel Raynal
2020-04-22  6:47   ` Boris Brezillon
2020-04-21 16:46 ` [PATCH 3/8] mtd: rawnand: onfi: Fix redundancy detection check Miquel Raynal
2020-04-22  6:49   ` Boris Brezillon [this message]
2020-04-21 16:46 ` [PATCH 4/8] mtd: rawnand: onfi: Use an intermediate variable to decomplefixy conditions Miquel Raynal
2020-04-22  6:51   ` Boris Brezillon
2020-04-21 16:46 ` [PATCH 5/8] mtd: rawnand: onfi: Avoid doing a copy of the parameter page Miquel Raynal
2020-04-22  6:54   ` Boris Brezillon
2020-04-21 16:46 ` [PATCH 6/8] mtd: rawnand: onfi: Simplify the NAND operations during detection Miquel Raynal
2020-04-22  7:00   ` Boris Brezillon
2020-04-22  7:25     ` Miquel Raynal
2020-04-21 16:46 ` [PATCH 7/8] mtd: rawnand: jedec: Use an intermediate variable to decomplefixy conditions Miquel Raynal
2020-04-22  7:02   ` Boris Brezillon
2020-04-22  8:49   ` Sergei Shtylyov
2020-04-22  9:33     ` Miquel Raynal
2020-04-21 16:46 ` [PATCH 8/8] mtd: rawnand: jedec: Simplify the NAND operations during detection Miquel Raynal
2020-04-22  7:05   ` Boris Brezillon

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