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| author | pekon gupta <pekon@ti.com> | 2014-03-20 18:49:58 +0530 |
|---|---|---|
| committer | Brian Norris <computersforpeace@gmail.com> | 2014-05-20 16:32:17 -0700 |
| commit | f306e8c3b667632952f1a4a74ffb910bbc06255f (patch) | |
| tree | fcefd08db04a0106077e81d503a02f778dc07857 | |
| parent | 9ab86995ed07f51c45ba1b549aff2bd6e46590e9 (diff) | |
| download | linux-f306e8c3b667632952f1a4a74ffb910bbc06255f.tar.gz | |
mtd: nand: omap: fix BCHx ecc.correct to return detected bit-flips in erased-page
fixes: commit 62116e5171e00f85a8d53f76e45b84423c89ff34
mtd: nand: omap2: Support for hardware BCH error correction.
In omap_elm_correct_data(), if bitflip_count in an erased-page is within the
correctable limit (< ecc.strength), then it is not indicated back to the caller
ecc->read_page().
This mis-guides upper layers like MTD and UBIFS layer to assume erased-page as
perfectly clean and use it for writing even if actual bitflip_count was
dangerously high (bitflip_count > mtd->bitflip_threshold).
This patch fixes this above issue, by returning 'stats' to caller
ecc->read_page() under all scenarios.
Reported-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Pekon Gupta <pekon@ti.com>
Cc: <stable@vger.kernel.org> # 3.9.x+
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
| -rw-r--r-- | drivers/mtd/nand/omap2.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c index 1b800bcda5a4..10c319eaad8b 100644 --- a/drivers/mtd/nand/omap2.c +++ b/drivers/mtd/nand/omap2.c @@ -1382,7 +1382,7 @@ static int omap_elm_correct_data(struct mtd_info *mtd, u_char *data, /* Check if any error reported */ if (!is_error_reported) - return 0; + return stat; /* Decode BCH error using ELM module */ elm_decode_bch_error_page(info->elm_dev, ecc_vec, err_vec); |