linux-kernel - [PATCH] mtdblock: tolerate corrected bit-flips

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Message-Id: <20230314165653.252673-1-libang.linuxer@gmail.com>
Date:   Wed, 15 Mar 2023 00:56:53 +0800
From:   Bang Li <libang.linuxer@...il.com>
To:     miquel.raynal@...tlin.com, richard@....at, vigneshr@...com
Cc:     linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Bang Li <libang.linuxer@...il.com>
Subject: [PATCH] mtdblock: tolerate corrected bit-flips

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@...il.com>
---
 drivers/mtd/mtdblock_ro.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/mtd/mtdblock_ro.c b/drivers/mtd/mtdblock_ro.c
index 7c51952ce55d..66ffc9f1ead2 100644
--- a/drivers/mtd/mtdblock_ro.c
+++ b/drivers/mtd/mtdblock_ro.c
@@ -16,8 +16,10 @@ static int mtdblock_readsect(struct mtd_blktrans_dev *dev,
 			      unsigned long block, char *buf)
 {
 	size_t retlen;
+	int err;
 
-	if (mtd_read(dev->mtd, (block * 512), 512, &retlen, buf))
+	err = mtd_read(dev->mtd, (block * 512), 512, &retlen, buf);
+	if (err && !mtd_is_bitflip(err))
 		return 1;
 	return 0;
 }
-- 
2.25.1