Hi Abhishek,

On Wed,  4 Apr 2018 18:12:21 +0530, Abhishek Sahu
<abs...@codeaurora.org> wrote:

> read_page and read_oob both calls the read_page_ecc function.
> The QCOM NAND controller protect the OOB available bytes with
> ECC so read errors should be checked for read_oob also. Now
> this patch moves the error checking code inside read_page_ecc
> so caller does not have to check explicitly for read errors.
> 
> Signed-off-by: Abhishek Sahu <abs...@codeaurora.org>

Nitpick: the prefix should be "mtd: rawnand: qcom: " now as this driver
has been moved to drivers/mtd/nand/raw/.

Otherwise:
Reviewed-by: Miquel Raynal <miquel.ray...@bootlin.com>

> ---
>  drivers/mtd/nand/qcom_nandc.c | 19 ++++++-------------
>  1 file changed, 6 insertions(+), 13 deletions(-)
> 
> diff --git a/drivers/mtd/nand/qcom_nandc.c b/drivers/mtd/nand/qcom_nandc.c
> index 0ebcc55..ba43752 100644
> --- a/drivers/mtd/nand/qcom_nandc.c
> +++ b/drivers/mtd/nand/qcom_nandc.c
> @@ -1676,6 +1676,7 @@ static int read_page_ecc(struct qcom_nand_host *host, 
> u8 *data_buf,
>       struct nand_chip *chip = &host->chip;
>       struct qcom_nand_controller *nandc = get_qcom_nand_controller(chip);
>       struct nand_ecc_ctrl *ecc = &chip->ecc;
> +     u8 *data_buf_start = data_buf, *oob_buf_start = oob_buf;
>       int i, ret;
>  
>       config_nand_page_read(nandc);
> @@ -1741,6 +1742,9 @@ static int read_page_ecc(struct qcom_nand_host *host, 
> u8 *data_buf,
>  
>       free_descs(nandc);
>  
> +     if (!ret)
> +             ret = parse_read_errors(host, data_buf_start, oob_buf_start);
> +
>       return ret;
>  }
>  
> @@ -1786,20 +1790,14 @@ static int qcom_nandc_read_page(struct mtd_info *mtd, 
> struct nand_chip *chip,
>       struct qcom_nand_host *host = to_qcom_nand_host(chip);
>       struct qcom_nand_controller *nandc = get_qcom_nand_controller(chip);
>       u8 *data_buf, *oob_buf = NULL;
> -     int ret;
>  
>       nand_read_page_op(chip, page, 0, NULL, 0);
>       data_buf = buf;
>       oob_buf = oob_required ? chip->oob_poi : NULL;
>  
>       clear_bam_transaction(nandc);
> -     ret = read_page_ecc(host, data_buf, oob_buf);
> -     if (ret) {
> -             dev_err(nandc->dev, "failure to read page\n");
> -             return ret;
> -     }
>  
> -     return parse_read_errors(host, data_buf, oob_buf);
> +     return read_page_ecc(host, data_buf, oob_buf);
>  }
>  
>  /* implements ecc->read_page_raw() */
> @@ -1889,7 +1887,6 @@ static int qcom_nandc_read_oob(struct mtd_info *mtd, 
> struct nand_chip *chip,
>       struct qcom_nand_host *host = to_qcom_nand_host(chip);
>       struct qcom_nand_controller *nandc = get_qcom_nand_controller(chip);
>       struct nand_ecc_ctrl *ecc = &chip->ecc;
> -     int ret;
>  
>       clear_read_regs(nandc);
>       clear_bam_transaction(nandc);
> @@ -1898,11 +1895,7 @@ static int qcom_nandc_read_oob(struct mtd_info *mtd, 
> struct nand_chip *chip,
>       set_address(host, 0, page);
>       update_rw_regs(host, ecc->steps, true);
>  
> -     ret = read_page_ecc(host, NULL, chip->oob_poi);
> -     if (ret)
> -             dev_err(nandc->dev, "failure to read oob\n");
> -
> -     return ret;
> +     return read_page_ecc(host, NULL, chip->oob_poi);
>  }
>  
>  /* implements ecc->write_page() */



-- 
Miquel Raynal, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com

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