linux-kernel - Re: [PATCH] mtd: rawnand: ingenic: Fix build error

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Date:   Sun, 16 Jun 2019 00:22:33 +0200
From:   Paul Cercueil <paul@...pouillou.net>
To:     YueHaibing <yuehaibing@...wei.com>
Cc:     miquel.raynal@...tlin.com, richard@....at, dwmw2@...radead.org,
        computersforpeace@...il.com, marek.vasut@...il.com,
        vigneshr@...com, gregkh@...uxfoundation.org,
        linux-kernel@...r.kernel.org, linux-mtd@...ts.infradead.org
Subject: Re: [PATCH] mtd: rawnand: ingenic: Fix build error

Hi,

I don't think the patch is correct. We want to be able to build
the ingenic_nand driver without the ingenic_ecc code.

The actual problem is that if the ingenic_nand driver is built-in,
then the ingenic_ecc driver must be built-in too (if enabled),
and we don't verify that constraint.

Something like that should work better:

config MTD_NAND_INGENIC_ECC
	def_tristate m if MTD_NAND_JZ4780=m
	def_tristate y if MTD_NAND_JZ4780=y

Thanks,
-Paul


Le sam. 15 juin 2019 à 15:44, YueHaibing <yuehaibing@...wei.com> a 
écrit :
> If MTD_NAND_JZ4780 is y and MTD_NAND_JZ4780_BCH is m,
> which select CONFIG_MTD_NAND_INGENIC_ECC to m, building fails:
> 
> drivers/mtd/nand/raw/ingenic/ingenic_nand.o: In function 
> `ingenic_nand_remove':
> ingenic_nand.c:(.text+0x177): undefined reference to 
> `ingenic_ecc_release'
> drivers/mtd/nand/raw/ingenic/ingenic_nand.o: In function 
> `ingenic_nand_ecc_correct':
> ingenic_nand.c:(.text+0x2ee): undefined reference to 
> `ingenic_ecc_correct'
> 
> Select MTD_NAND_INGENIC_ECC if MTD_NAND_JZ4780 is set
> 
> Reported-by: Hulk Robot <hulkci@...wei.com>
> Fiexes: 15de8c6efd0e ("mtd: rawnand: ingenic: Separate top-level and 
> SoC specific code")
> Signed-off-by: YueHaibing <yuehaibing@...wei.com>
> ---
>  drivers/mtd/nand/raw/ingenic/Kconfig | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/drivers/mtd/nand/raw/ingenic/Kconfig 
> b/drivers/mtd/nand/raw/ingenic/Kconfig
> index 19a96ce..d0b1909 100644
> --- a/drivers/mtd/nand/raw/ingenic/Kconfig
> +++ b/drivers/mtd/nand/raw/ingenic/Kconfig
> @@ -9,6 +9,7 @@ config MTD_NAND_JZ4740
>  config MTD_NAND_JZ4780
>  	tristate "JZ4780 NAND controller"
>  	depends on JZ4780_NEMC
> +	select MTD_NAND_INGENIC_ECC
>  	help
>  	  Enables support for NAND Flash connected to the NEMC on JZ4780 SoC
>  	  based boards, using the BCH controller for hardware error 
> correction.
> @@ -20,7 +21,6 @@ config MTD_NAND_INGENIC_ECC
> 
>  config MTD_NAND_JZ4740_ECC
>  	tristate "Hardware BCH support for JZ4740 SoC"
> -	select MTD_NAND_INGENIC_ECC
>  	help
>  	  Enable this driver to support the Reed-Solomon error-correction
>  	  hardware present on the JZ4740 SoC from Ingenic.
> @@ -30,7 +30,6 @@ config MTD_NAND_JZ4740_ECC
> 
>  config MTD_NAND_JZ4725B_BCH
>  	tristate "Hardware BCH support for JZ4725B SoC"
> -	select MTD_NAND_INGENIC_ECC
>  	help
>  	  Enable this driver to support the BCH error-correction hardware
>  	  present on the JZ4725B SoC from Ingenic.
> @@ -40,7 +39,6 @@ config MTD_NAND_JZ4725B_BCH
> 
>  config MTD_NAND_JZ4780_BCH
>  	tristate "Hardware BCH support for JZ4780 SoC"
> -	select MTD_NAND_INGENIC_ECC
>  	help
>  	  Enable this driver to support the BCH error-correction hardware
>  	  present on the JZ4780 SoC from Ingenic.
> --
> 2.7.4
> 
>