diff options
| author | Brian Norris <computersforpeace@gmail.com> | 2012-08-31 15:01:19 -0700 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2012-09-29 15:34:13 +0100 |
| commit | 74d83beaa229aac7d126ac1ed9414658ff1a89d2 (patch) | |
| tree | 72100bf61281de2d6201c7d8e31ea2e4de5d209b | |
| parent | 6f12f59a5f0dc014209bcc21d5689a6611e1c1e7 (diff) | |
| download | linux-74d83beaa229aac7d126ac1ed9414658ff1a89d2.tar.bz2 | |
JFFS2: don't fail on bitflips in OOB
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>
Cc: stable@vger.kernel.org
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| -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 6f4529d3697f..a6597d60d76d 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; } |