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| author | Boris BREZILLON <boris.brezillon@free-electrons.com> | 2015-10-13 11:22:18 +0200 |
|---|---|---|
| committer | Brian Norris <computersforpeace@gmail.com> | 2015-10-13 21:56:49 +0200 |
| commit | 45aaeff947190e4b57b2d0db4d74ab5eea450825 (patch) | |
| tree | 881a4d58f0b030a6dfa0892730ee173e3e17aa27 /drivers/mtd/nand/atmel_nand.c | |
| parent | mtd: nand: txx9ndfmc: show parent device in sysfs (diff) | |
| download | linux-45aaeff947190e4b57b2d0db4d74ab5eea450825.tar.xz linux-45aaeff947190e4b57b2d0db4d74ab5eea450825.zip | |
mtd: nand: pass page number to ecc->write_xxx() methods
The ->read_xxx() methods are all passed the page number the NAND controller
is supposed to read, but ->write_xxx() do not have such a parameter.
This is a problem if we want to properly implement data
scrambling/randomization in order to mitigate MLC sensibility to repeated
pattern: to prevent bitflips in adjacent pages in the same block we need
to avoid repeating the same pattern at the same offset in those pages,
hence the randomizer/scrambler engine need to be passed the page value
in order to adapt its seed accordingly.
Moreover, adding the page parameter to the ->write_xxx() methods add some
consistency to the current API.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
CC: Josh Wu <josh.wu@atmel.com>
CC: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
CC: Maxime Ripard <maxime.ripard@free-electrons.com>
CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
CC: Huang Shijie <shijie.huang@arm.com>
CC: Stefan Agner <stefan@agner.ch>
CC: devel@driverdev.osuosl.org
CC: linux-arm-kernel@lists.infradead.org
CC: linux-kernel@vger.kernel.org
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Diffstat (limited to 'drivers/mtd/nand/atmel_nand.c')
| -rw-r--r-- | drivers/mtd/nand/atmel_nand.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c index 898947378713..583cdd9bb971 100644 --- a/drivers/mtd/nand/atmel_nand.c +++ b/drivers/mtd/nand/atmel_nand.c @@ -954,7 +954,8 @@ static int atmel_nand_pmecc_read_page(struct mtd_info *mtd, } static int atmel_nand_pmecc_write_page(struct mtd_info *mtd, - struct nand_chip *chip, const uint8_t *buf, int oob_required) + struct nand_chip *chip, const uint8_t *buf, int oob_required, + int page) { struct atmel_nand_host *host = chip->priv; uint32_t *eccpos = chip->ecc.layout->eccpos; @@ -2005,7 +2006,8 @@ static int nfc_sram_write_page(struct mtd_info *mtd, struct nand_chip *chip, if (likely(!raw)) /* Need to write ecc into oob */ - status = chip->ecc.write_page(mtd, chip, buf, oob_required); + status = chip->ecc.write_page(mtd, chip, buf, oob_required, + page); if (status < 0) return status; |