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

From: Paul Cercueil
Date: Mon Jun 17 2019 - 07:29:06 EST

Hi Arnd,

Le lun. 17 juin 2019 à 13:10, Arnd Bergmann <arnd@xxxxxxxx> a écrit :
The ecc code is called from the main ingenic_nand module, but the
Kconfig symbol gets selected by the dependent ones.

If the child drivers are loadable modules, this leads to a link

drivers/mtd/nand/raw/ingenic/ingenic_nand.o: In function `ingenic_nand_remove':
ingenic_nand.c:(.text+0x1a1): undefined reference to `ingenic_ecc_release'
drivers/mtd/nand/raw/ingenic/ingenic_nand.o: In function `ingenic_nand_ecc_correct':
ingenic_nand.c:(.text+0x1fa): undefined reference to `ingenic_ecc_correct'
drivers/mtd/nand/raw/ingenic/ingenic_nand.o: In function `ingenic_nand_ecc_calculate':
ingenic_nand.c:(.text+0x255): undefined reference to `ingenic_ecc_calculate'
drivers/mtd/nand/raw/ingenic/ingenic_nand.o: In function `ingenic_nand_probe':
ingenic_nand.c:(.text+0x3ca): undefined reference to `of_ingenic_ecc_get'
ingenic_nand.c:(.text+0x685): undefined reference to `ingenic_ecc_release'

Rearrange this to have the ecc code linked the same way as the main

I think there's a better way to fix it, only in Kconfig.

* Add a bool symbol MTD_NAND_INGENIC_USE_HW_ECC
* Have the three ECC/BCH drivers select this symbol instead of
* Add the following to the MTD_NAND_JZ4780 config option:

Fixes: 15de8c6efd0e ("mtd: rawnand: ingenic: Separate top-level and SoC specific code")
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
drivers/mtd/nand/raw/ingenic/Kconfig | 2 +-
drivers/mtd/nand/raw/ingenic/Makefile | 5 ++++-
2 files changed, 5 insertions(+), 2 deletions(-)

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

- 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..5a55efc5d9bb 100644
--- a/drivers/mtd/nand/raw/ingenic/Makefile
+++ b/drivers/mtd/nand/raw/ingenic/Makefile
@@ -2,7 +2,10 @@
obj-$(CONFIG_MTD_NAND_JZ4740) += jz4740_nand.o
obj-$(CONFIG_MTD_NAND_JZ4780) += ingenic_nand.o

-obj-$(CONFIG_MTD_NAND_INGENIC_ECC) += ingenic_ecc.o
+obj-$(CONFIG_MTD_NAND_JZ4780) += 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