6.6-stable review patch. If anyone has any objections, please let me know.
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From: Miquel Raynal miquel.raynal@bootlin.com
commit 3a1b777eb9fb75d09c45ae5dd1d007eddcbebf1f upstream.
Until recently the "upper layer" was MTD. But following incremental reworks to bring spi-nand support and more recently generic ECC support, there is now an intermediate "generic NAND" layer that also needs to get access to some values. When using "converted" ECC engines, like the software ones, these values are already propagated correctly. But otherwise when using good old raw NAND controller drivers, we need to manually set these values ourselves at the end of the "scan" operation, once these values have been negotiated.
Without this propagation, later (generic) checks like the one warning users that the ECC strength is not high enough might simply no longer work.
Fixes: 8c126720fe10 ("mtd: rawnand: Use the ECC framework nand_ecc_is_strong_enough() helper") Cc: stable@vger.kernel.org Reported-by: Sascha Hauer s.hauer@pengutronix.de Closes: https://lore.kernel.org/all/Zhe2JtvvN1M4Ompw@pengutronix.de/ Signed-off-by: Miquel Raynal miquel.raynal@bootlin.com Tested-by: Sascha Hauer s.hauer@pengutronix.de Link: https://lore.kernel.org/linux-mtd/20240507085842.108844-1-miquel.raynal@boot... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/mtd/nand/raw/nand_base.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)
--- a/drivers/mtd/nand/raw/nand_base.c +++ b/drivers/mtd/nand/raw/nand_base.c @@ -6282,6 +6282,7 @@ static const struct nand_ops rawnand_ops static int nand_scan_tail(struct nand_chip *chip) { struct mtd_info *mtd = nand_to_mtd(chip); + struct nand_device *base = &chip->base; struct nand_ecc_ctrl *ecc = &chip->ecc; int ret, i;
@@ -6426,9 +6427,13 @@ static int nand_scan_tail(struct nand_ch if (!ecc->write_oob_raw) ecc->write_oob_raw = ecc->write_oob;
- /* propagate ecc info to mtd_info */ + /* Propagate ECC info to the generic NAND and MTD layers */ mtd->ecc_strength = ecc->strength; + if (!base->ecc.ctx.conf.strength) + base->ecc.ctx.conf.strength = ecc->strength; mtd->ecc_step_size = ecc->size; + if (!base->ecc.ctx.conf.step_size) + base->ecc.ctx.conf.step_size = ecc->size;
/* * Set the number of read / write steps for one page depending on ECC @@ -6436,6 +6441,8 @@ static int nand_scan_tail(struct nand_ch */ if (!ecc->steps) ecc->steps = mtd->writesize / ecc->size; + if (!base->ecc.ctx.nsteps) + base->ecc.ctx.nsteps = ecc->steps; if (ecc->steps * ecc->size != mtd->writesize) { WARN(1, "Invalid ECC parameters\n"); ret = -EINVAL;