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| author | Mike Dunn <mikedunn@newsguy.com> | 2012-04-25 12:06:08 -0700 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2012-05-13 23:11:39 -0500 |
| commit | d062d4ede877fcd2ecc4c6262abad09a6f32950a (patch) | |
| tree | 320869428d5aef43b803c4a8131140aabb21c8fb /include/linux | |
| parent | a9b672e82bca47bf2b37ee869b8095000cf3ca88 (diff) | |
| download | linux-stable-d062d4ede877fcd2ecc4c6262abad09a6f32950a.tar.gz linux-stable-d062d4ede877fcd2ecc4c6262abad09a6f32950a.tar.bz2 linux-stable-d062d4ede877fcd2ecc4c6262abad09a6f32950a.zip | |
mtd: bitflip_threshold added to mtd_info and sysfs
An element 'bitflip_threshold' is added to struct mtd_info, and also exposed as
a read/write variable in sysfs. This will be used to determine whether or not
mtd_read() returns -EUCLEAN or 0 (absent a hard error). If the driver leaves it
as zero, mtd will set it to a default value of ecc_strength.
This v2 adds the line that propagates bitflip_threshold from the master to the
partitions - thanks Ivan¹.
¹ http://lists.infradead.org/pipermail/linux-mtd/2012-April/040900.html
Signed-off-by: Mike Dunn <mikedunn@newsguy.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/mtd/mtd.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h index cd0119d19cd9..63dadc0dfb62 100644 --- a/include/linux/mtd/mtd.h +++ b/include/linux/mtd/mtd.h @@ -157,6 +157,15 @@ struct mtd_info { unsigned int erasesize_mask; unsigned int writesize_mask; + /* + * read ops return -EUCLEAN if max number of bitflips corrected on any + * one region comprising an ecc step equals or exceeds this value. + * Settable by driver, else defaults to ecc_strength. User can override + * in sysfs. N.B. The meaning of the -EUCLEAN return code has changed; + * see Documentation/ABI/testing/sysfs-class-mtd for more detail. + */ + unsigned int bitflip_threshold; + // Kernel-only stuff starts here. const char *name; int index; |