[PATCH v2] mtd: nand: Fix build error while CONFIG_MTD_NAND_ECC_SW_BCH is set to module

[Yue Haibing]

From: YueHaibing <yuehaibing@xxxxxxxxxx>

Fix gcc build error while CONFIG_MTD_NAND_ECC_SW_BCH
is set to module:

drivers/mtd/nand/raw/nand_base.o: In function `nand_cleanup':
(.text+0xef6): undefined reference to `nand_bch_free'
drivers/mtd/nand/raw/nand_base.o: In function `nand_scan_tail':
nand_base.c:(.text+0xa101): undefined reference to `nand_bch_calculate_ecc'
nand_base.c:(.text+0xa120): undefined reference to `nand_bch_correct_data'
nand_base.c:(.text+0xa269): undefined reference to `nand_bch_init'

CONFIG_MTD_NAND_ECC_SW_BCH should not be set to M,
while MTD_RAW_NAND is set to y.

Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
Fixes: 193bd4002644 ("mtd: nand: add software BCH ECC support")
Suggested-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>
Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx>
---
v2: use imply as suggestion
---
 drivers/mtd/devices/Kconfig  |  2 +-
 drivers/mtd/nand/raw/Kconfig | 21 +++++++++++----------
 2 files changed, 12 insertions(+), 11 deletions(-)

diff --git a/drivers/mtd/devices/Kconfig b/drivers/mtd/devices/Kconfig
index 7fcdaf6..f9258d6 100644
--- a/drivers/mtd/devices/Kconfig
+++ b/drivers/mtd/devices/Kconfig
@@ -207,7 +207,7 @@ comment "Disk-On-Chip Device Drivers"
 config MTD_DOCG3
 	tristate "M-Systems Disk-On-Chip G3"
 	select BCH
-	select BCH_CONST_PARAMS if !CONFIG_MTD_NAND_ECC_SW_BCH
+	select BCH_CONST_PARAMS if !MTD_NAND_ECC_SW_BCH
 	select BITREVERSE
 	help
 	  This provides an MTD device driver for the M-Systems DiskOnChip
diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig
index 615d738..65c85fc 100644
--- a/drivers/mtd/nand/raw/Kconfig
+++ b/drivers/mtd/nand/raw/Kconfig
@@ -9,11 +9,22 @@ config MTD_NAND_ECC_SW_HAMMING_SMC
 	  Software ECC according to the Smart Media Specification.
 	  The original Linux implementation had byte 0 and 1 swapped.
 
+config MTD_NAND_ECC_SW_BCH
+	tristate "Support software BCH ECC"
+	select BCH
+	default n
+	help
+	  This enables support for software BCH error correction. Binary BCH
+	  codes are more powerful and cpu intensive than traditional Hamming
+	  ECC codes. They are used with NAND devices requiring more than 1 bit
+	  of error correction.
+
 menuconfig MTD_RAW_NAND
 	tristate "Raw/Parallel NAND Device Support"
 	depends on MTD
 	select MTD_NAND_CORE
 	select MTD_NAND_ECC_SW_HAMMING
+	imply MTD_NAND_ECC_SW_BCH
 	help
 	  This enables support for accessing all type of raw/parallel
 	  NAND flash devices. For further information see
@@ -21,16 +32,6 @@ menuconfig MTD_RAW_NAND
 
 if MTD_RAW_NAND
 
-config MTD_NAND_ECC_SW_BCH
-	tristate "Support software BCH ECC"
-	select BCH
-	default n
-	help
-	  This enables support for software BCH error correction. Binary BCH
-	  codes are more powerful and cpu intensive than traditional Hamming
-	  ECC codes. They are used with NAND devices requiring more than 1 bit
-	  of error correction.
-
 comment "Raw/parallel NAND flash controllers"
 
 config MTD_NAND_DENALI
-- 
2.7.4