5.15-stable review patch. If anyone has any objections, please let me know.
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From: Miquel Raynal miquel.raynal@bootlin.com
commit 3a4a893dbb19e229db3b753f0462520b561dee98 upstream.
The NAND core complies with the ONFI specification, which itself mentions that after any program or erase operation, a status check should be performed to see whether the operation was finished *and* successful.
The NAND core offers helpers to finish a page write (sending the "PAGE PROG" command, waiting for the NAND chip to be ready again, and checking the operation status). But in some cases, advanced controller drivers might want to optimize this and craft their own page write helper to leverage additional hardware capabilities, thus not always using the core facilities.
Some drivers, like this one, do not use the core helper to finish a page write because the final cycles are automatically managed by the hardware. In this case, the additional care must be taken to manually perform the final status check.
Let's read the NAND chip status at the end of the page write helper and return -EIO upon error.
Cc: Michal Simek michal.simek@amd.com Cc: stable@vger.kernel.org Fixes: 88ffef1b65cf ("mtd: rawnand: arasan: Support the hardware BCH ECC engine") Signed-off-by: Miquel Raynal miquel.raynal@bootlin.com Acked-by: Michal Simek michal.simek@amd.com Link: https://lore.kernel.org/linux-mtd/20230717194221.229778-2-miquel.raynal@boot... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/mtd/nand/raw/arasan-nand-controller.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-)
--- a/drivers/mtd/nand/raw/arasan-nand-controller.c +++ b/drivers/mtd/nand/raw/arasan-nand-controller.c @@ -515,6 +515,7 @@ static int anfc_write_page_hw_ecc(struct struct mtd_info *mtd = nand_to_mtd(chip); unsigned int len = mtd->writesize + (oob_required ? mtd->oobsize : 0); dma_addr_t dma_addr; + u8 status; int ret; struct anfc_op nfc_op = { .pkt_reg = @@ -561,10 +562,21 @@ static int anfc_write_page_hw_ecc(struct }
/* Spare data is not protected */ - if (oob_required) + if (oob_required) { ret = nand_write_oob_std(chip, page); + if (ret) + return ret; + } + + /* Check write status on the chip side */ + ret = nand_status_op(chip, &status); + if (ret) + return ret; + + if (status & NAND_STATUS_FAIL) + return -EIO;
- return ret; + return 0; }
static int anfc_sel_write_page_hw_ecc(struct nand_chip *chip, const u8 *buf,