Re: [PATCH] Revert "mtd: nand: make interleaved placement optional"

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Hello Alexander,

On 30.10.24 12:54, Alexander Shiyan wrote:
> This reverts commit d1fe68f1b010b83ddd3559ffbfcb70dca68b2563
> and ec3b8c646bdc8c2ea0a78923ccb745012eabc097 (as a fixup).
> 
> The message "CONFIG_NAND_NEED_ECC_PLACEMENT_INTERLEAVED is disabled"
> is always issued, regardless of the MTD ECC layout used, since it
> is executed through "fallthrough" from the previous case statement.
> 
> Additionally, if !IS_ENABLED(CONFIG_NAND_NEED_ECC_PLACEMENT_INTERLEAVED)
> is triggered, the patch calls break, which disables the additional checks.
> 
> Signed-off-by: Alexander Shiyan <eagle.alexander923@xxxxxxxxx>
> ---
>  drivers/mtd/nand/raw/Kconfig     | 4 ----
>  drivers/mtd/nand/raw/nand_base.c | 4 ----
>  2 files changed, 8 deletions(-)
> 
> diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig
> index b6c6e62731..e9d1b83706 100644
> --- a/drivers/mtd/nand/raw/Kconfig
> +++ b/drivers/mtd/nand/raw/Kconfig
> @@ -35,9 +35,6 @@ config NAND_ALLOW_ERASE_BAD
>  config NAND_NEED_EXEC_OP
>  	bool
>  
> -config NAND_NEED_ECC_PLACEMENT_INTERLEAVED
> -	bool
> -
>  comment "Raw/parallel NAND flash controllers"
>  
>  config NAND_IMX
> @@ -159,7 +156,6 @@ config MTD_NAND_DENALI
>  	tristate "Support Denali NAND controller"
>  	depends on HAS_DMA
>  	select NAND_NEED_EXEC_OP
> -	select NAND_NEED_ECC_PLACEMENT_INTERLEAVED
>  	help
>  	  Enable support for the Denali NAND controller.  This should be
>  	  combined with either the PCI or platform drivers to provide device
> diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
> index b6bef46499..9769725026 100644
> --- a/drivers/mtd/nand/raw/nand_base.c
> +++ b/drivers/mtd/nand/raw/nand_base.c
> @@ -5671,10 +5671,6 @@ static int nand_set_ecc_on_host_ops(struct nand_chip *chip)
>  		fallthrough;
>  
>  	case NAND_ECC_PLACEMENT_INTERLEAVED:
> -		if (!IS_ENABLED(CONFIG_NAND_NEED_ECC_PLACEMENT_INTERLEAVED)) {
> -			WARN(1, "CONFIG_NAND_NEED_ECC_PLACEMENT_INTERLEAVED is disabled\n");
> -			break;
> -		}

These config options were added to control barebox size. We need something
here, so size conscious users can opt out.

Cheers,
Ahmad

>  		if ((!ecc->calculate || !ecc->correct || !ecc->hwctl) &&
>  		    (!ecc->read_page ||
>  		     ecc->read_page == nand_read_page_hwecc ||


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