target/linux/mvebu/patches-3.10/0134-mtd-nand-pxa3xx-read_page-returns-max_bitflips.patch

   1 From 97598678602aaea473303523ce37a45d258206ca Mon Sep 17 00:00:00 2001
   2 From: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
   3 Date: Thu, 7 Nov 2013 12:17:13 -0300
   4 Subject: [PATCH 134/203] mtd: nand: pxa3xx: read_page() returns max_bitflips
   5
   6 As per the ecc.read_page() prototype, we must return the maximum number
   7 of bitflips that were corrected on any one region covering an ecc step.
   8
   9 Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
  10 Tested-by: Daniel Mack <zonque@gmail.com>
  11 Signed-off-by: Brian Norris <computersforpeace@gmail.com>
  12 ---
  13  drivers/mtd/nand/pxa3xx_nand.c | 4 +++-
  14  1 file changed, 3 insertions(+), 1 deletion(-)
  15
  16 --- a/drivers/mtd/nand/pxa3xx_nand.c
  17 +++ b/drivers/mtd/nand/pxa3xx_nand.c
  18 @@ -751,6 +751,7 @@ static int pxa3xx_nand_read_page_hwecc(s
  19  {
  20         struct pxa3xx_nand_host *host = mtd->priv;
  21         struct pxa3xx_nand_info *info = host->info_data;
  22 +       int max_bitflips = 0;
  23
  24         chip->read_buf(mtd, buf, mtd->writesize);
  25         chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
  26 @@ -758,6 +759,7 @@ static int pxa3xx_nand_read_page_hwecc(s
  27         if (info->retcode == ERR_SBERR) {
  28                 switch (info->use_ecc) {
  29                 case 1:
  30 +                       max_bitflips = 1;
  31                         mtd->ecc_stats.corrected++;
  32                         break;
  33                 case 0:
  34 @@ -776,7 +778,7 @@ static int pxa3xx_nand_read_page_hwecc(s
  35                         mtd->ecc_stats.failed++;
  36         }
  37
  38 -       return 0;
  39 +       return max_bitflips;
  40  }
  41
  42  static uint8_t pxa3xx_nand_read_byte(struct mtd_info *mtd)