Re: [PATCH] mtd: rawnand: ingenic: Fix ingenic_ecc dependency

[Miquel Raynal <miquel.raynal@bootlin.com>]

Hi Paul,

One question below.

Paul Cercueil <paul@crapouillou.net> wrote on Sat, 29 Jun 2019 03:22:48
+0200:

> 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'
> 
> To fix that, the ingenic_nand and ingenic_ecc modules have been fused
> into one single module.
> - The ingenic_ecc.c code is now compiled in only if
>   $(CONFIG_MTD_NAND_INGENIC_ECC) is set. This is now a boolean instead
>   of tristate.
> - To avoid changing the module name, the ingenic_nand.c file is moved to
>   ingenic_nand_drv.c. Then the module name is still ingenic_nand.
> - Since ingenic_ecc.c is no more a module, the module-specific macros
>   have been dropped, and the functions are no more exported for use by
>   the ingenic_nand driver.

I am fine with this approach.

> 
> Fixes: 15de8c6efd0e ("mtd: rawnand: ingenic: Separate top-level and SoC specific code")
> Signed-off-by: Paul Cercueil <paul@crapouillou.net>
> Reported-by: Arnd Bergmann <arnd@arndb.de>
> Reported-by: Hulk Robot <hulkci@huawei.com>
> Cc: YueHaibing <yuehaibing@huawei.com>
> Cc: stable@vger.kernel.org
> ---
>  drivers/mtd/nand/raw/ingenic/Kconfig                     | 2 +-
>  drivers/mtd/nand/raw/ingenic/Makefile                    | 4 +++-
>  drivers/mtd/nand/raw/ingenic/ingenic_ecc.c               | 9 ---------
>  .../raw/ingenic/{ingenic_nand.c => ingenic_nand_drv.c}   | 0
>  4 files changed, 4 insertions(+), 11 deletions(-)
>  rename drivers/mtd/nand/raw/ingenic/{ingenic_nand.c => ingenic_nand_drv.c} (100%)
> 
> diff --git a/drivers/mtd/nand/raw/ingenic/Kconfig b/drivers/mtd/nand/raw/ingenic/Kconfig
> index 19a96ce515c1..66b7cffdb0c2 100644
> --- a/drivers/mtd/nand/raw/ingenic/Kconfig
> +++ b/drivers/mtd/nand/raw/ingenic/Kconfig
> @@ -16,7 +16,7 @@ config MTD_NAND_JZ4780
>  if MTD_NAND_JZ4780
>  
>  config MTD_NAND_INGENIC_ECC
> -	tristate
> +	bool
>  
>  config MTD_NAND_JZ4740_ECC
>  	tristate "Hardware BCH support for JZ4740 SoC"
> diff --git a/drivers/mtd/nand/raw/ingenic/Makefile b/drivers/mtd/nand/raw/ingenic/Makefile
> index 1ac4f455baea..b63d36889263 100644
> --- a/drivers/mtd/nand/raw/ingenic/Makefile
> +++ b/drivers/mtd/nand/raw/ingenic/Makefile
> @@ -2,7 +2,9 @@
>  obj-$(CONFIG_MTD_NAND_JZ4740) += jz4740_nand.o
>  obj-$(CONFIG_MTD_NAND_JZ4780) += ingenic_nand.o
>  
> -obj-$(CONFIG_MTD_NAND_INGENIC_ECC) += ingenic_ecc.o
> +ingenic_nand-y += ingenic_nand_drv.o
> +ingenic_nand-$(CONFIG_MTD_NAND_INGENIC_ECC) += ingenic_ecc.o
> +
>  obj-$(CONFIG_MTD_NAND_JZ4740_ECC) += jz4740_ecc.o
>  obj-$(CONFIG_MTD_NAND_JZ4725B_BCH) += jz4725b_bch.o
>  obj-$(CONFIG_MTD_NAND_JZ4780_BCH) += jz4780_bch.o
> diff --git a/drivers/mtd/nand/raw/ingenic/ingenic_ecc.c b/drivers/mtd/nand/raw/ingenic/ingenic_ecc.c
> index d3e085c5685a..c954189606f6 100644
> --- a/drivers/mtd/nand/raw/ingenic/ingenic_ecc.c
> +++ b/drivers/mtd/nand/raw/ingenic/ingenic_ecc.c
> @@ -30,7 +30,6 @@ int ingenic_ecc_calculate(struct ingenic_ecc *ecc,
>  {
>  	return ecc->ops->calculate(ecc, params, buf, ecc_code);
>  }
> -EXPORT_SYMBOL(ingenic_ecc_calculate);
>  
>  /**
>   * ingenic_ecc_correct() - detect and correct bit errors
> @@ -51,7 +50,6 @@ int ingenic_ecc_correct(struct ingenic_ecc *ecc,
>  {
>  	return ecc->ops->correct(ecc, params, buf, ecc_code);
>  }
> -EXPORT_SYMBOL(ingenic_ecc_correct);
>  
>  /**
>   * ingenic_ecc_get() - get the ECC controller device
> @@ -111,7 +109,6 @@ struct ingenic_ecc *of_ingenic_ecc_get(struct device_node *of_node)
>  	}
>  	return ecc;
>  }
> -EXPORT_SYMBOL(of_ingenic_ecc_get);
>  
>  /**
>   * ingenic_ecc_release() - release the ECC controller device
> @@ -122,7 +119,6 @@ void ingenic_ecc_release(struct ingenic_ecc *ecc)
>  	clk_disable_unprepare(ecc->clk);
>  	put_device(ecc->dev);
>  }
> -EXPORT_SYMBOL(ingenic_ecc_release);
>  
>  int ingenic_ecc_probe(struct platform_device *pdev)
>  {
> @@ -159,8 +155,3 @@ int ingenic_ecc_probe(struct platform_device *pdev)
>  	return 0;
>  }
>  EXPORT_SYMBOL(ingenic_ecc_probe);

Any reason to keep this one?

Thanks,
Miquèl