From: Bang Li libang.linuxer@gmail.com
commit 0c3089601f064d80b3838eceb711fcac04bceaad upstream.
mtd_read() may return -EUCLEAN in case of corrected bit-flips.This particular condition should not be treated like an error.
Signed-off-by: Bang Li libang.linuxer@gmail.com Fixes: e47f68587b82 ("mtd: check for max_bitflips in mtd_read_oob()") Cc: stable@vger.kernel.org # v3.7 Acked-by: Richard Weinberger richard@nod.at Signed-off-by: Miquel Raynal miquel.raynal@bootlin.com Link: https://lore.kernel.org/linux-mtd/20230328163012.4264-1-libang.linuxer@gmail... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/mtd/mtdblock.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-)
--- a/drivers/mtd/mtdblock.c +++ b/drivers/mtd/mtdblock.c @@ -164,7 +164,7 @@ static int do_cached_write (struct mtdbl mtdblk->cache_state = STATE_EMPTY; ret = mtd_read(mtd, sect_start, sect_size, &retlen, mtdblk->cache_data); - if (ret) + if (ret && !mtd_is_bitflip(ret)) return ret; if (retlen != sect_size) return -EIO; @@ -199,8 +199,12 @@ static int do_cached_read (struct mtdblk pr_debug("mtdblock: read on "%s" at 0x%lx, size 0x%x\n", mtd->name, pos, len);
- if (!sect_size) - return mtd_read(mtd, pos, len, &retlen, buf); + if (!sect_size) { + ret = mtd_read(mtd, pos, len, &retlen, buf); + if (ret && !mtd_is_bitflip(ret)) + return ret; + return 0; + }
while (len > 0) { unsigned long sect_start = (pos/sect_size)*sect_size; @@ -220,7 +224,7 @@ static int do_cached_read (struct mtdblk memcpy (buf, mtdblk->cache_data + offset, size); } else { ret = mtd_read(mtd, pos, size, &retlen, buf); - if (ret) + if (ret && !mtd_is_bitflip(ret)) return ret; if (retlen != size) return -EIO;