From: Álvaro Fernández Rojas noltari@gmail.com
The current code checks that the whole OOB area is erased. This is a problem when JFFS2 cleanmarkers are added to the OOB, since it will fail due to the usable OOB bytes not being 0xff. Correct this by only checking that data and ECC bytes aren't 0xff.
Fixes: 02b88eea9f9c ("mtd: brcmnand: Add check for erased page bitflips") Signed-off-by: Álvaro Fernández Rojas noltari@gmail.com Signed-off-by: Miquel Raynal miquel.raynal@bootlin.com Link: https://lore.kernel.org/linux-mtd/20200512082451.771212-1-noltari@gmail.com [Ported to U-Boot from the Linux kernel] Signed-off-by: Linus Walleij linus.walleij@linaro.org --- drivers/mtd/nand/raw/brcmnand/brcmnand.c | 19 +++++++++++-------- 1 file changed, 11 insertions(+), 8 deletions(-)
diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c b/drivers/mtd/nand/raw/brcmnand/brcmnand.c index d082801b8306..b87e3e0656df 100644 --- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c +++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c @@ -1829,11 +1829,12 @@ static int brcmnand_read_by_pio(struct mtd_info *mtd, struct nand_chip *chip, static int brcmstb_nand_verify_erased_page(struct mtd_info *mtd, struct nand_chip *chip, void *buf, u64 addr) { - int i, sas; - void *oob = chip->oob_poi; + struct mtd_oob_region ecc; + int i; int bitflips = 0; int page = addr >> chip->page_shift; int ret; + void *ecc_bytes; void *ecc_chunk;
if (!buf) { @@ -1846,18 +1847,20 @@ static int brcmstb_nand_verify_erased_page(struct mtd_info *mtd, chip->pagebuf = -1; }
- sas = mtd->oobsize / chip->ecc.steps; - /* read without ecc for verification */ ret = chip->ecc.read_page_raw(mtd, chip, buf, true, page); if (ret) return ret;
- for (i = 0; i < chip->ecc.steps; i++, oob += sas) { + for (i = 0; i < chip->ecc.steps; i++) { ecc_chunk = buf + chip->ecc.size * i; - ret = nand_check_erased_ecc_chunk(ecc_chunk, - chip->ecc.size, - oob, sas, NULL, 0, + + mtd_ooblayout_ecc(mtd, i, &ecc); + ecc_bytes = chip->oob_poi + ecc.offset; + + ret = nand_check_erased_ecc_chunk(ecc_chunk, chip->ecc.size, + ecc_bytes, ecc.length, + NULL, 0, chip->ecc.strength); if (ret < 0) return ret;