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authorBen Dooks <ben-mtd@fluff.org>2008-04-15 11:36:20 +0100
committerDavid Woodhouse <dwmw2@infradead.org>2008-04-22 21:41:03 +0100
commitc45c6c68333c04de84c21a4b869f36a96f642779 (patch)
tree142fb3db8452f127262937891069f075f00bec41 /drivers/mtd/nand
parent71d54f3855b4ca98559e8782350336ec2433cc24 (diff)
[MTD] [NAND] S3C2410 Allow unset ecc to be ignored for ecc correction
If a block's ecc field is all 0xff, then ignore the ECC correction. This is for systems where some of the blocks, such as the initial cramfs are written without ECC and need to be loaded on start. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Diffstat (limited to 'drivers/mtd/nand')
-rw-r--r--drivers/mtd/nand/s3c2410.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/mtd/nand/s3c2410.c b/drivers/mtd/nand/s3c2410.c
index 15397e0f396..35401f7b930 100644
--- a/drivers/mtd/nand/s3c2410.c
+++ b/drivers/mtd/nand/s3c2410.c
@@ -357,6 +357,14 @@ static int s3c2410_nand_correct_data(struct mtd_info *mtd, u_char *dat,
if (diff0 == 0 && diff1 == 0 && diff2 == 0)
return 0; /* ECC is ok */
+ /* sometimes people do not think about using the ECC, so check
+ * to see if we have an 0xff,0xff,0xff read ECC and then ignore
+ * the error, on the assumption that this is an un-eccd page.
+ */
+ if (read_ecc[0] == 0xff && read_ecc[1] == 0xff && read_ecc[2] == 0xff
+ && info->platform->ignore_unset_ecc)
+ return 0;
+
/* Can we correct this ECC (ie, one row and column change).
* Note, this is similar to the 256 error code on smartmedia */