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| author | RogerCC Lin <rogercc.lin@mediatek.com> | 2016-09-19 10:53:26 +0800 |
|---|---|---|
| committer | Boris Brezillon <boris.brezillon@free-electrons.com> | 2016-09-19 11:57:04 +0200 |
| commit | 559e58e7ed2dadc310f174e609ead8a3e8acfc4e (patch) | |
| tree | 9c0ac8720cf9981916b58c53fecf687798f986a7 /drivers/mtd | |
| parent | 7a353289925f01cb188ebc6fc4f4a33456b7de44 (diff) | |
| download | linux-559e58e7ed2dadc310f174e609ead8a3e8acfc4e.tar.gz linux-559e58e7ed2dadc310f174e609ead8a3e8acfc4e.tar.bz2 linux-559e58e7ed2dadc310f174e609ead8a3e8acfc4e.zip | |
mtd: nand: fix chances to create incomplete ECC data when writing
When mtk_nfc_do_write_page() comparing the sector number,because the
sector number field is at the 12th-bit position of NFI_BYTELEN
register,the masked register should be shifted 12 bits before being
compared.The result of this bug may cause the second subpage has
incomplete ECC parity bytes.
Signed-off-by: RogerCC Lin <rogercc.lin@mediatek.com>
Fixes: 1d6b1e464950 ("mtd: mediatek: driver for MTK Smart Device")
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/nand/mtk_nand.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/mtd/nand/mtk_nand.c b/drivers/mtd/nand/mtk_nand.c index ddaa2acb9dd7..5223a2182ee4 100644 --- a/drivers/mtd/nand/mtk_nand.c +++ b/drivers/mtd/nand/mtk_nand.c @@ -93,6 +93,9 @@ #define NFI_FSM_MASK (0xf << 16) #define NFI_ADDRCNTR (0x70) #define CNTR_MASK GENMASK(16, 12) +#define ADDRCNTR_SEC_SHIFT (12) +#define ADDRCNTR_SEC(val) \ + (((val) & CNTR_MASK) >> ADDRCNTR_SEC_SHIFT) #define NFI_STRADDR (0x80) #define NFI_BYTELEN (0x84) #define NFI_CSEL (0x90) @@ -699,7 +702,7 @@ static int mtk_nfc_do_write_page(struct mtd_info *mtd, struct nand_chip *chip, } ret = readl_poll_timeout_atomic(nfc->regs + NFI_ADDRCNTR, reg, - (reg & CNTR_MASK) >= chip->ecc.steps, + ADDRCNTR_SEC(reg) >= chip->ecc.steps, 10, MTK_TIMEOUT); if (ret) dev_err(dev, "hwecc write timeout\n"); @@ -902,7 +905,7 @@ static int mtk_nfc_read_subpage(struct mtd_info *mtd, struct nand_chip *chip, dev_warn(nfc->dev, "read ahb/dma done timeout\n"); rc = readl_poll_timeout_atomic(nfc->regs + NFI_BYTELEN, reg, - (reg & CNTR_MASK) >= sectors, 10, + ADDRCNTR_SEC(reg) >= sectors, 10, MTK_TIMEOUT); if (rc < 0) { dev_err(nfc->dev, "subpage done timeout\n"); |