diff options
| author | Brian Norris <computersforpeace@gmail.com> | 2012-08-31 15:01:19 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-10-13 05:50:35 +0900 |
| commit | 4f0f3fedbb68f71b9b3048d1b59b37aad41ad6a1 (patch) | |
| tree | 2c2d55e3d4acf96f4f9dd9f424754f7c31888aab | |
| parent | f6140a8820b12af81b7d346d0c75e4523d5338eb (diff) | |
JFFS2: don't fail on bitflips in OOB
commit 74d83beaa229aac7d126ac1ed9414658ff1a89d2 upstream.
JFFS2 was designed without thought for OOB bitflips, it seems, but they
can occur and will be reported to JFFS2 via mtd_read_oob()[1]. We don't
want to fail on these transactions, since the data was corrected.
[1] Few drivers report bitflips for OOB-only transactions. With such
drivers, this patch should have no effect.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/jffs2/wbuf.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/jffs2/wbuf.c b/fs/jffs2/wbuf.c index 6f4529d3697..a6597d60d76 100644 --- a/fs/jffs2/wbuf.c +++ b/fs/jffs2/wbuf.c @@ -1044,10 +1044,10 @@ int jffs2_check_oob_empty(struct jffs2_sb_info *c, ops.datbuf = NULL; ret = mtd_read_oob(c->mtd, jeb->offset, &ops); - if (ret || ops.oobretlen != ops.ooblen) { + if ((ret && !mtd_is_bitflip(ret)) || ops.oobretlen != ops.ooblen) { pr_err("cannot read OOB for EB at %08x, requested %zd bytes, read %zd bytes, error %d\n", jeb->offset, ops.ooblen, ops.oobretlen, ret); - if (!ret) + if (!ret || mtd_is_bitflip(ret)) ret = -EIO; return ret; } @@ -1086,10 +1086,10 @@ int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, ops.datbuf = NULL; ret = mtd_read_oob(c->mtd, jeb->offset, &ops); - if (ret || ops.oobretlen != ops.ooblen) { + if ((ret && !mtd_is_bitflip(ret)) || ops.oobretlen != ops.ooblen) { pr_err("cannot read OOB for EB at %08x, requested %zd bytes, read %zd bytes, error %d\n", jeb->offset, ops.ooblen, ops.oobretlen, ret); - if (!ret) + if (!ret || mtd_is_bitflip(ret)) ret = -EIO; return ret; } |