[PATCH] mtd: nand: Change dependency between the NAND and ECC cores

[Miquel Raynal]

The NAND ECC core is included in the generic NAND core when it is
compiled in.

Different software ECC engines drivers will select the NAND ECC core
and thus also have a dependency on the NAND core. Using a "depends on"
between the two leads to possible cases (not real cases, but created
by robots) where one is still unselected because of the "select does
not verifies depends on" game:

WARNING: unmet direct dependencies detected for MTD_NAND_ECC
  Depends on [n]: MTD [=m] && MTD_NAND_CORE [=n]
  Selected by [m]:
  - MTD_NAND_ECC_SW_HAMMING [=y] && MTD [=m]
  - MTD_NAND_ECC_SW_BCH [=y] && MTD [=m]

Fix this by using a select instead.

Reported-by: Randy Dunlap <rdunlap at infradead.org>
Signed-off-by: Miquel Raynal <miquel.raynal at bootlin.com>
---
 drivers/mtd/nand/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
index 15ffe1a1b863..b40455234cbd 100644
--- a/drivers/mtd/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig
@@ -13,7 +13,7 @@ menu "ECC engine support"
 
 config MTD_NAND_ECC
        bool
-       depends on MTD_NAND_CORE
+       select MTD_NAND_CORE
 
 config MTD_NAND_ECC_SW_HAMMING
 	bool "Software Hamming ECC engine"
-- 
2.20.1