mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-27 12:23:19 +02:00
fc54b9bf15
(stable-branch of Openmoko) git-svn-id: svn://svn.openwrt.org/openwrt/trunk@13613 3c298f89-4303-0410-b956-a3cf2f4a3e73
67 lines
2.1 KiB
Diff
67 lines
2.1 KiB
Diff
From b6817bed9516a65276ee92437697cb46136df882 Mon Sep 17 00:00:00 2001
|
|
From: mokopatches <mokopatches@openmoko.org>
|
|
Date: Sun, 13 Apr 2008 07:23:57 +0100
|
|
Subject: [PATCH] fix-hwecc-2410.patch
|
|
S3C24xx ECC mis-calculates the bit to flip:
|
|
http://lists.infradead.org/pipermail/linux-mtd/2007-October/019586.html
|
|
If the error couldn't be corrected, we returned "no problem" :-(
|
|
http://lists.infradead.org/pipermail/linux-mtd/2007-October/019615.html
|
|
|
|
Signed-off-by: Werner Almesberger <werner@openmoko.org>
|
|
---
|
|
drivers/mtd/nand/s3c2410.c | 28 +++++++++++++---------------
|
|
1 files changed, 13 insertions(+), 15 deletions(-)
|
|
|
|
diff --git a/drivers/mtd/nand/s3c2410.c b/drivers/mtd/nand/s3c2410.c
|
|
index f83bed9..f7dd4e0 100644
|
|
--- a/drivers/mtd/nand/s3c2410.c
|
|
+++ b/drivers/mtd/nand/s3c2410.c
|
|
@@ -364,23 +364,21 @@ static int s3c2410_nand_correct_data(struct mtd_info *mtd, u_char *dat,
|
|
((diff2 ^ (diff2 >> 1)) & 0x55) == 0x55) {
|
|
/* calculate the bit position of the error */
|
|
|
|
- bit = (diff2 >> 2) & 1;
|
|
- bit |= (diff2 >> 3) & 2;
|
|
- bit |= (diff2 >> 4) & 4;
|
|
+ bit = ((diff2 >> 3) & 1) |
|
|
+ ((diff2 >> 4) & 2) |
|
|
+ ((diff2 >> 5) & 4);
|
|
|
|
/* calculate the byte position of the error */
|
|
|
|
- byte = (diff1 << 1) & 0x80;
|
|
- byte |= (diff1 << 2) & 0x40;
|
|
- byte |= (diff1 << 3) & 0x20;
|
|
- byte |= (diff1 << 4) & 0x10;
|
|
-
|
|
- byte |= (diff0 >> 3) & 0x08;
|
|
- byte |= (diff0 >> 2) & 0x04;
|
|
- byte |= (diff0 >> 1) & 0x02;
|
|
- byte |= (diff0 >> 0) & 0x01;
|
|
-
|
|
- byte |= (diff2 << 8) & 0x100;
|
|
+ byte = ((diff2 << 7) & 0x100) |
|
|
+ ((diff1 << 0) & 0x80) |
|
|
+ ((diff1 << 1) & 0x40) |
|
|
+ ((diff1 << 2) & 0x20) |
|
|
+ ((diff1 << 3) & 0x10) |
|
|
+ ((diff0 >> 4) & 0x08) |
|
|
+ ((diff0 >> 3) & 0x04) |
|
|
+ ((diff0 >> 2) & 0x02) |
|
|
+ ((diff0 >> 1) & 0x01);
|
|
|
|
dev_dbg(info->device, "correcting error bit %d, byte %d\n",
|
|
bit, byte);
|
|
@@ -399,7 +397,7 @@ static int s3c2410_nand_correct_data(struct mtd_info *mtd, u_char *dat,
|
|
if ((diff0 & ~(1<<fls(diff0))) == 0)
|
|
return 1;
|
|
|
|
- return 0;
|
|
+ return -EBADMSG;
|
|
}
|
|
|
|
/* ECC functions
|
|
--
|
|
1.5.6.5
|
|
|