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authorScott Wood <scottwood@freescale.com>2007-12-13 11:15:28 -0600
committerDavid Woodhouse <dwmw2@infradead.org>2008-01-08 07:51:57 +0000
commit78b65179d08e7e4466ba69d5ede85035a2c96358 (patch)
tree274983abdb3635b371bc5c9495d56e26934f2116 /drivers/mtd/nand/nand_base.c
parent36f97bc617e2c31d16b74e89cd2406de4d24ede5 (diff)
[MTD] [NAND] Don't panic if a controller driver does ecc its own way.
Some hardware, such as the enhanced local bus controller used on some mpc83xx chips, does ecc transparently when reading and writing data, rather than providing a generic calculate/correct mechanism that can be exported to the nand subsystem. The subsystem should not BUG() when calculate, correct, or hwctl are missing, if the methods that call them have been overridden. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Diffstat (limited to 'drivers/mtd/nand/nand_base.c')
-rw-r--r--drivers/mtd/nand/nand_base.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index e29c1da7f56..85a7283845f 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -2469,8 +2469,12 @@ int nand_scan_tail(struct mtd_info *mtd)
chip->ecc.write_oob = nand_write_oob_std;
case NAND_ECC_HW_SYNDROME:
- if (!chip->ecc.calculate || !chip->ecc.correct ||
- !chip->ecc.hwctl) {
+ if ((!chip->ecc.calculate || !chip->ecc.correct ||
+ !chip->ecc.hwctl) &&
+ (!chip->ecc.read_page ||
+ chip->ecc.read_page == nand_read_page_hwecc) ||
+ !chip->ecc.write_page ||
+ chip->ecc.write_page == nand_write_page_hwecc) {
printk(KERN_WARNING "No ECC functions supplied, "
"Hardware ECC not possible\n");
BUG();