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authorBen Dooks <ben-mtd@fluff.org>2008-04-15 06:36:20 -0400
committerDavid Woodhouse <dwmw2@infradead.org>2008-04-22 16:41:03 -0400
commitc45c6c68333c04de84c21a4b869f36a96f642779 (patch)
tree142fb3db8452f127262937891069f075f00bec41 /drivers/mtd/nand/s3c2410.c
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/s3c2410.c')
-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 15397e0f3965..35401f7b9302 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,
357 if (diff0 == 0 && diff1 == 0 && diff2 == 0) 357 if (diff0 == 0 && diff1 == 0 && diff2 == 0)
358 return 0; /* ECC is ok */ 358 return 0; /* ECC is ok */
359 359
360 /* sometimes people do not think about using the ECC, so check
361 * to see if we have an 0xff,0xff,0xff read ECC and then ignore
362 * the error, on the assumption that this is an un-eccd page.
363 */
364 if (read_ecc[0] == 0xff && read_ecc[1] == 0xff && read_ecc[2] == 0xff
365 && info->platform->ignore_unset_ecc)
366 return 0;
367
360 /* Can we correct this ECC (ie, one row and column change). 368 /* Can we correct this ECC (ie, one row and column change).
361 * Note, this is similar to the 256 error code on smartmedia */ 369 * Note, this is similar to the 256 error code on smartmedia */
362 370