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| author |   Masahiro Yamada <yamada.masahiro@socionext.com> | 2017-03-30 15:45:47 +0900 |
|---|---|---|
| committer |   Boris Brezillon <boris.brezillon@free-electrons.com> | 2017-04-25 14:18:31 +0200 |
| commit | 07604686e808cd93d352172806a7828860f048f5 (patch) | |
| tree | cf462396e69f6c7a61dead633765e555deaf6de4 /include/linux | |
| parent | mtd: nand: Remove unused chip->write_page() hook (diff) | |
| download | linux-dev-07604686e808cd93d352172806a7828860f048f5.tar.xz linux-dev-07604686e808cd93d352172806a7828860f048f5.zip | |
mtd: nand: relax ecc.read_page() return value for uncorrectable ECC
The comment for ecc.read_page() requires that it should return
"0 if bitflips uncorrectable".
Actually, drivers could return positive values when uncorrectable
bitflips occur. For example, nand_read_page_swecc() is the case.
If ecc.correct() returns -EBADMSG for the first ECC sector, and
a positive value for the second one, nand_read_page_swecc() returns
a positive max_bitflips and increments ecc_stats.failed for the same
page.
The requirement can be relaxed by tweaking nand_do_read_ops().
Move the max_bitflips calculation below the retry.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Suggested-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Diffstat (limited to '')
| -rw-r--r-- | include/linux/mtd/nand.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index 40657939797c..9e0c93c44bef 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -516,7 +516,7 @@ static inline void nand_hw_control_init(struct nand_hw_control *nfc) * out-of-band data). * @read_page: function to read a page according to the ECC generator * requirements; returns maximum number of bitflips corrected in - * any single ECC step, 0 if bitflips uncorrectable, -EIO hw error + * any single ECC step, -EIO hw error * @read_subpage: function to read parts of the page covered by ECC; * returns same as read_page() * @write_subpage: function to write parts of the page covered by ECC. |