diff options
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 | |||
| 142 | Contact: linux-mtd@lists.infradead.org | 142 | Contact: linux-mtd@lists.infradead.org |
| 143 | Description: | 143 | Description: |
| 144 | This allows the user to examine and adjust the criteria by which | 144 | This allows the user to examine and adjust the criteria by which |
| 145 | mtd returns -EUCLEAN from mtd_read(). If the maximum number of | 145 | mtd returns -EUCLEAN from mtd_read() and mtd_read_oob(). If the |
| 146 | bit errors that were corrected on any single region comprising | 146 | maximum number of bit errors that were corrected on any single |
| 147 | an ecc step (as reported by the driver) equals or exceeds this | 147 | region comprising an ecc step (as reported by the driver) equals |
| 148 | value, -EUCLEAN is returned. Otherwise, absent an error, 0 is | 148 | or exceeds this value, -EUCLEAN is returned. Otherwise, absent |
| 149 | returned. Higher layers (e.g., UBI) use this return code as an | 149 | an error, 0 is returned. Higher layers (e.g., UBI) use this |
| 150 | indication that an erase block may be degrading and should be | 150 | return code as an indication that an erase block may be |
| 151 | scrutinized as a candidate for being marked as bad. | 151 | degrading and should be scrutinized as a candidate for being |
| 152 | marked as bad. | ||
| 152 | 153 | ||
| 153 | The initial value may be specified by the flash device driver. | 154 | The initial value may be specified by the flash device driver. |
| 154 | If not, then the default value is ecc_strength. | 155 | If not, then the default value is ecc_strength. |
| @@ -167,7 +168,7 @@ Description: | |||
| 167 | block degradation, but high enough to avoid the consequences of | 168 | block degradation, but high enough to avoid the consequences of |
| 168 | a persistent return value of -EUCLEAN on devices where sticky | 169 | a persistent return value of -EUCLEAN on devices where sticky |
| 169 | bitflips occur. Note that if bitflip_threshold exceeds | 170 | bitflips occur. Note that if bitflip_threshold exceeds |
| 170 | ecc_strength, -EUCLEAN is never returned by mtd_read(). | 171 | ecc_strength, -EUCLEAN is never returned by the read operations. |
| 171 | Conversely, if bitflip_threshold is zero, -EUCLEAN is always | 172 | Conversely, if bitflip_threshold is zero, -EUCLEAN is always |
| 172 | returned, absent a hard error. | 173 | returned, absent a hard error. |
| 173 | 174 | ||