Re: [PATCH v2 3/9] mtd: rawnand: onfi: Fix redundancy detection check

[Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>]

On Fri, 24 Apr 2020 18:40:36 +0200
Miquel Raynal <miquel.raynal@xxxxxxxxxxx> 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.
> 

This one probably deserves Fixes and Cc-stable tags.

> Signed-off-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
> Reviewed-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>
> ---
>  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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