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Date: Mon, 18 Feb 2019 10:42:46 +0000 From: Schrempf Frieder <frieder.schrempf@...tron.de> To: "bbrezillon@...nel.org" <bbrezillon@...nel.org>, "miquel.raynal@...tlin.com" <miquel.raynal@...tlin.com>, "richard@....at" <richard@....at>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> CC: "linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>, "Schrempf Frieder" <frieder.schrempf@...tron.de>, David Woodhouse <dwmw2@...radead.org>, Brian Norris <computersforpeace@...il.com>, Marek Vasut <marek.vasut@...il.com> Subject: [PATCH v4 7/7] mtd: rawnand: AMD: Also use the last page for bad block markers From: Frieder Schrempf <frieder.schrempf@...tron.de> According to the datasheet of some Cypress SLC NANDs, the bad block markers can be in the first, second or last page of a block. So let's check all three locations. Signed-off-by: Frieder Schrempf <frieder.schrempf@...tron.de> Reviewed-by: Boris Brezillon <bbrezillon@...nel.org> --- drivers/mtd/nand/raw/nand_amd.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/mtd/nand/raw/nand_amd.c b/drivers/mtd/nand/raw/nand_amd.c index 6202cbf7ee8d..2ffcddff3e27 100644 --- a/drivers/mtd/nand/raw/nand_amd.c +++ b/drivers/mtd/nand/raw/nand_amd.c @@ -40,7 +40,13 @@ static void amd_nand_decode_id(struct nand_chip *chip) static int amd_nand_init(struct nand_chip *chip) { if (nand_is_slc(chip)) - chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE; + /* + * According to the datasheet of some Cypress SLC NANDs, + * the bad block markers can be in the first, second or last + * page of a block. So let's check all three locations. + */ + chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE | + NAND_BBM_LASTPAGE; return 0; } -- 2.17.1
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