From: Bang Li <libang.linuxer@gmail.com>
To: miquel.raynal@bootlin.com, richard@nod.at, vigneshr@ti.com
Cc: linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org,
Bang Li <libang.linuxer@gmail.com>,
stable@vger.kernel.org
Subject: [PATCH v2] mtdblock: tolerate corrected bit-flips
Date: Wed, 29 Mar 2023 00:30:12 +0800 [thread overview]
Message-ID: <20230328163012.4264-1-libang.linuxer@gmail.com> (raw)
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
---
Changes since v1:
- Resend this patch with Cc and Fixes tags
---
drivers/mtd/mtdblock.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/drivers/mtd/mtdblock.c b/drivers/mtd/mtdblock.c
index 1e94e7d10b8b..a0a1194dc1d9 100644
--- a/drivers/mtd/mtdblock.c
+++ b/drivers/mtd/mtdblock.c
@@ -153,7 +153,7 @@ static int do_cached_write (struct mtdblk_dev *mtdblk, unsigned long pos,
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;
@@ -188,8 +188,12 @@ static int do_cached_read (struct mtdblk_dev *mtdblk, unsigned long pos,
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;
@@ -209,7 +213,7 @@ static int do_cached_read (struct mtdblk_dev *mtdblk, unsigned long pos,
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;
--
2.25.1
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next reply other threads:[~2023-03-28 16:30 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-28 16:30 Bang Li [this message]
2023-03-28 16:51 ` [PATCH v2] mtdblock: tolerate corrected bit-flips Richard Weinberger
2023-04-03 15:59 ` Miquel Raynal
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