linux-kernel - Re: [PATCH v2 3/3] mtd: rawnand: qcom: Fix read len for onfi param page

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Message-ID: <20241126054529.ewoajuaor4wpa4xe@thinkpad>
Date: Tue, 26 Nov 2024 11:15:29 +0530
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To: Md Sadre Alam <quic_mdalam@...cinc.com>
Cc: miquel.raynal@...tlin.com, richard@....at, vigneshr@...com,
	bbrezillon@...nel.org, linux-mtd@...ts.infradead.org,
	linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
	quic_srichara@...cinc.com, quic_varada@...cinc.com,
	quic_nainmeht@...cinc.com, quic_laksd@...cinc.com
Subject: Re: [PATCH v2 3/3] mtd: rawnand: qcom: Fix read len for onfi param
 page

On Fri, Nov 22, 2024 at 02:29:33PM +0530, Md Sadre Alam wrote:
> The minimum size to fetch the data from device to QPIC buffer
> is 512-bytes. If size is less than 512-bytes the data will not be
> protected by ECC as per QPIC standard. So while reading onfi parameter
> page from NAND device setting nandc->buf_count = 512.

s/setting/set

> 
> Cc: stable@...r.kernel.org
> Fixes: 89550beb098e ("mtd: rawnand: qcom: Implement exec_op()")
> Signed-off-by: Md Sadre Alam <quic_mdalam@...cinc.com>

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>

- Mani

> ---
> 
> Change in [v2]
> 
> * Set buf_count to 512 in the parameter page read
> 
> Change in [v1]
> 
> * This patch was not included in v1
> 
>  drivers/mtd/nand/raw/qcom_nandc.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/mtd/nand/raw/qcom_nandc.c b/drivers/mtd/nand/raw/qcom_nandc.c
> index 31ec3db1246d..e1dca4857754 100644
> --- a/drivers/mtd/nand/raw/qcom_nandc.c
> +++ b/drivers/mtd/nand/raw/qcom_nandc.c
> @@ -2926,7 +2926,7 @@ static int qcom_param_page_type_exec(struct nand_chip *chip,  const struct nand_
>  		write_reg_dma(nandc, NAND_DEV_CMD1, 1, NAND_BAM_NEXT_SGL);
>  	}
>  
> -	nandc->buf_count = len;
> +	nandc->buf_count = 512;
>  	memset(nandc->data_buffer, 0xff, nandc->buf_count);
>  
>  	config_nand_single_cw_page_read(chip, false, 0);
> -- 
> 2.34.1
> 

-- 
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