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author | Arnd Bergmann <arnd@arndb.de> | 2012-07-21 23:34:31 +0200 |
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committer | Arnd Bergmann <arnd@arndb.de> | 2012-07-21 23:34:31 +0200 |
commit | 088eb2a84b3b093af60bbe0b65151e8a9cd2d57d (patch) | |
tree | 8f145d8c71f6e249d6664b5482ac216b8c6e4016 /Documentation/ABI/testing/sysfs-class-mtd | |
parent | 6217a69a1e38807b3046b4fd6e4bf413e0e03b67 (diff) | |
parent | 84a1caf1453c3d44050bd22db958af4a7f99315c (diff) | |
download | talos-op-linux-088eb2a84b3b093af60bbe0b65151e8a9cd2d57d.tar.gz talos-op-linux-088eb2a84b3b093af60bbe0b65151e8a9cd2d57d.zip |
Merge tag 'v3.5-rc7' into late/soc
Linux 3.5-rc7
Diffstat (limited to 'Documentation/ABI/testing/sysfs-class-mtd')
-rw-r--r-- | Documentation/ABI/testing/sysfs-class-mtd | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-mtd b/Documentation/ABI/testing/sysfs-class-mtd index db1ad7e34fc3..938ef71e2035 100644 --- a/Documentation/ABI/testing/sysfs-class-mtd +++ b/Documentation/ABI/testing/sysfs-class-mtd @@ -142,13 +142,14 @@ KernelVersion: 3.4 Contact: linux-mtd@lists.infradead.org Description: This allows the user to examine and adjust the criteria by which - mtd returns -EUCLEAN from mtd_read(). If the maximum number of - bit errors that were corrected on any single region comprising - an ecc step (as reported by the driver) equals or exceeds this - value, -EUCLEAN is returned. Otherwise, absent an error, 0 is - returned. Higher layers (e.g., UBI) use this return code as an - indication that an erase block may be degrading and should be - scrutinized as a candidate for being marked as bad. + mtd returns -EUCLEAN from mtd_read() and mtd_read_oob(). If the + maximum number of bit errors that were corrected on any single + region comprising an ecc step (as reported by the driver) equals + or exceeds this value, -EUCLEAN is returned. Otherwise, absent + an error, 0 is returned. Higher layers (e.g., UBI) use this + return code as an indication that an erase block may be + degrading and should be scrutinized as a candidate for being + marked as bad. The initial value may be specified by the flash device driver. If not, then the default value is ecc_strength. @@ -167,7 +168,7 @@ Description: block degradation, but high enough to avoid the consequences of a persistent return value of -EUCLEAN on devices where sticky bitflips occur. Note that if bitflip_threshold exceeds - ecc_strength, -EUCLEAN is never returned by mtd_read(). + ecc_strength, -EUCLEAN is never returned by the read operations. Conversely, if bitflip_threshold is zero, -EUCLEAN is always returned, absent a hard error. |