[PATCH v7] mtd: gpmi: Deal with bitflips in erased regions

[Huang Shijie]

On Fri, Jan 03, 2014 at 10:27:19PM +0100, Elie De Brauwer wrote:
> 
> @@ -1003,15 +1028,27 @@ static int gpmi_ecc_read_page(struct mtd_info *mtd, struct nand_chip *chip,
>  	status = auxiliary_virt + nfc_geo->auxiliary_status_offset;
>  
>  	for (i = 0; i < nfc_geo->ecc_chunk_count; i++, status++) {
> -		if ((*status == STATUS_GOOD) || (*status == STATUS_ERASED))
> +		if (*status == STATUS_GOOD)
>  			continue;
>  
>  		if (*status == STATUS_UNCORRECTABLE) {
>  			mtd->ecc_stats.failed++;
>  			continue;
>  		}
> -		mtd->ecc_stats.corrected += *status;
> -		max_bitflips = max_t(unsigned int, max_bitflips, *status);
> +
> +		/* 

Hi Brian:
  Please do not forget to remove the whitespace at the end of the above line
  when you merge this patch.

thanks
Huang Shijie


> +		 * The number of bitflips are either counted in software
> +		 * in case of an erased chunk or otherwise reported by
> +		 * the BCH block.
> +		 */
> +		if (*status == STATUS_ERASED)
> +			flips = erased_sector_bitflips(payload_virt, i,
> +							       nfc_geo);
> +		else
> +			flips = *status;
> +