diff options
| author | Boris BREZILLON <boris.brezillon@free-electrons.com> | 2015-12-30 20:32:03 +0100 |
|---|---|---|
| committer | Brian Norris <computersforpeace@gmail.com> | 2016-01-06 18:45:46 -0800 |
| commit | 6e9411923b8f4c0e568cbae0f35b7ee4eb989914 (patch) | |
| tree | ec7bf6355c95b14fd19794119d7fd5fbfb9e0186 /include/linux/mtd/nand.h | |
| parent | 6f357de854a6dfb9ce0d5d65f3971cf3d0a4af6f (diff) | |
mtd: nand: return consistent error codes in ecc.correct() implementations
The error code returned by the ecc.correct() are not consistent over the
all implementations.
Document the expected behavior in include/linux/mtd/nand.h and fix
offending implementations.
[Brian: this looks like a bugfix for the ECC reporting in the bf5xx_nand
driver, but we haven't seen any testing results for it]
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Tested-by: Franklin S Cooper Jr. <fcooper@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Diffstat (limited to 'include/linux/mtd/nand.h')
| -rw-r--r-- | include/linux/mtd/nand.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index 3e92be1d2d43..518958115182 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -456,7 +456,13 @@ struct nand_hw_control { * @hwctl: function to control hardware ECC generator. Must only * be provided if an hardware ECC is available * @calculate: function for ECC calculation or readback from ECC hardware - * @correct: function for ECC correction, matching to ECC generator (sw/hw) + * @correct: function for ECC correction, matching to ECC generator (sw/hw). + * Should return a positive number representing the number of + * corrected bitflips, -EBADMSG if the number of bitflips exceed + * ECC strength, or any other error code if the error is not + * directly related to correction. + * If -EBADMSG is returned the input buffers should be left + * untouched. * @read_page_raw: function to read a raw page without ECC. This function * should hide the specific layout used by the ECC * controller and always return contiguous in-band and |