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.

Sascha


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