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Date:   Mon, 20 Nov 2017 11:26:26 +0800
From:   Albert Hsieh <>
        Albert Hsieh <>
Subject: [PATCH 1/1] mtd: nand: brcmnand: Zero bitflip is not an error

A negative return value of brcmstb_nand_verify_erased_page() indicates a
real bitflip error of an erased page, and other return values (>= 0) show
the corrected bitflip number. Zero return value means no bitflip, but the
current driver code treats it as an error, and eventually leads to
falsely reported ECC error.

Fixes: 02b88eea9f9c ("mtd: brcmnand: Add check for erased page bitflip")
Signed-off-by: Albert Hsieh <>
 drivers/mtd/nand/brcmnand/brcmnand.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mtd/nand/brcmnand/brcmnand.c b/drivers/mtd/nand/brcmnand/brcmnand.c
index e0eb51d..dd56a67 100644
--- a/drivers/mtd/nand/brcmnand/brcmnand.c
+++ b/drivers/mtd/nand/brcmnand/brcmnand.c
@@ -1763,7 +1763,7 @@ static int brcmnand_read(struct mtd_info *mtd, struct nand_chip *chip,
 			err = brcmstb_nand_verify_erased_page(mtd, chip, buf,
 			/* erased page bitflips corrected */
-			if (err > 0)
+			if (err >= 0)
 				return err;

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