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Message-ID: <20171206101645.0576dff9@bbrezillon> Date: Wed, 6 Dec 2017 10:16:45 +0100 From: Boris Brezillon <boris.brezillon@...e-electrons.com> To: Albert Hsieh <wen.hsieh@...adcom.com>, richard@....at Cc: computersforpeace@...il.com, hsiehwt@...il.com, kdasu.kdev@...il.com, linux-kernel@...r.kernel.org, marek.vasut@...il.com, linux-mtd@...ts.infradead.org, cyrille.pitchen@...ev4u.fr, bcm-kernel-feedback-list@...adcom.com, dwmw2@...radead.org Subject: Re: [PATCH 1/1] mtd: nand: brcmnand: Zero bitflip is not an error On Mon, 20 Nov 2017 11:26:26 +0800 Albert Hsieh <wen.hsieh@...adcom.com> wrote: > 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 <wen.hsieh@...adcom.com> Acked-by: Boris Brezillon <boris.brezillon@...e-electrons.com> Cc: <stable@...r.kernel.org> Richard, can you queue this patch to the mtd/master branch? Thanks, Boris > --- > 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, > addr); > /* erased page bitflips corrected */ > - if (err > 0) > + if (err >= 0) > return err; > } >
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