6.4-stable review patch. If anyone has any objections, please let me know.
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From: William Zhang william.zhang@broadcom.com
[ Upstream commit 60177390fa061c62d156f4a546e3efd90df3c183 ]
brcmnand controller can only access the flash spare area up to certain bytes based on the ECC level. It can be less than the actual flash spare area size. For example, for many NAND chip supporting ECC BCH-8, it has 226 bytes spare area. But controller can only uses 218 bytes. So brcmand driver overrides the mtd oobsize with the controller's accessible spare area size. When the nand base driver utilizes the nand_device object, it resets the oobsize back to the actual flash spare aprea size from nand_memory_organization structure and controller may not able to access all the oob area as mtd advises.
This change fixes the issue by overriding the oobsize in the nand_memory_organization structure to the controller's accessible spare area size.
Fixes: a7ab085d7c16 ("mtd: rawnand: Initialize the nand_device object") Signed-off-by: William Zhang william.zhang@broadcom.com Signed-off-by: Miquel Raynal miquel.raynal@bootlin.com Link: https://lore.kernel.org/linux-mtd/20230706182909.79151-6-william.zhang@broad... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/mtd/nand/raw/brcmnand/brcmnand.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c b/drivers/mtd/nand/raw/brcmnand/brcmnand.c index 2e9c2e2d9c9f7..d8418d7fcc372 100644 --- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c +++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c @@ -2612,6 +2612,8 @@ static int brcmnand_setup_dev(struct brcmnand_host *host) struct nand_chip *chip = &host->chip; const struct nand_ecc_props *requirements = nanddev_get_ecc_requirements(&chip->base); + struct nand_memory_organization *memorg = + nanddev_get_memorg(&chip->base); struct brcmnand_controller *ctrl = host->ctrl; struct brcmnand_cfg *cfg = &host->hwcfg; char msg[128]; @@ -2633,10 +2635,11 @@ static int brcmnand_setup_dev(struct brcmnand_host *host) if (cfg->spare_area_size > ctrl->max_oob) cfg->spare_area_size = ctrl->max_oob; /* - * Set oobsize to be consistent with controller's spare_area_size, as - * the rest is inaccessible. + * Set mtd and memorg oobsize to be consistent with controller's + * spare_area_size, as the rest is inaccessible. */ mtd->oobsize = cfg->spare_area_size * (mtd->writesize >> FC_SHIFT); + memorg->oobsize = mtd->oobsize;
cfg->device_size = mtd->size; cfg->block_size = mtd->erasesize;