Hi Sascha,

On 01/30/2018 08:11 AM, Sascha Hauer wrote:
On Mon, Jan 29, 2018 at 02:04:11PM +0100, Daniel Schultz wrote:
The read page function should return the total count of flipped bits,
otherwise the caller always thinks no bitflip occured.

Signed-off-by: Daniel Schultz <d.schu...@phytec.de>
---
  drivers/mtd/nand/nand_omap_gpmc.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mtd/nand/nand_omap_gpmc.c 
b/drivers/mtd/nand/nand_omap_gpmc.c
index e18ce63..38f4960 100644
--- a/drivers/mtd/nand/nand_omap_gpmc.c
+++ b/drivers/mtd/nand/nand_omap_gpmc.c
@@ -712,7 +712,7 @@ static int omap_gpmc_read_page_bch_rom_mode(struct mtd_info 
*mtd,
        else
                mtd->ecc_stats.corrected += stat;
- return 0;
+       return stat;
  }
I'm afraid this is not enough. read_page should return the maximum
number of bitflips in any ECC step. You first have to change
omap_correct_bch() so that it returns this number.
ahh, we worked on this problem a half year ago and it seems like three patches are missing upstream:

http://lists.infradead.org/pipermail/barebox/2017-June/030385.html
http://lists.infradead.org/pipermail/barebox/2017-June/030384.html
http://lists.infradead.org/pipermail/barebox/2017-June/030355.html

Daniel

Sascha



--
Mit freundlichen Grüßen,
With best regards,
  Daniel Schultz

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