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author | Boris BREZILLON <boris.brezillon@free-electrons.com> | 2015-10-13 11:22:18 +0200 |
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committer | Brian Norris <computersforpeace@gmail.com> | 2015-10-13 12:56:49 -0700 |
commit | 45aaeff947190e4b57b2d0db4d74ab5eea450825 (patch) | |
tree | 881a4d58f0b030a6dfa0892730ee173e3e17aa27 /drivers/mtd/nand/docg4.c | |
parent | 693ad87205ce6ea4c5699e3d2413f644ad903177 (diff) | |
download | op-kernel-dev-45aaeff947190e4b57b2d0db4d74ab5eea450825.zip op-kernel-dev-45aaeff947190e4b57b2d0db4d74ab5eea450825.tar.gz |
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/docg4.c')
-rw-r--r-- | drivers/mtd/nand/docg4.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/mtd/nand/docg4.c b/drivers/mtd/nand/docg4.c index 510c12d..408cf69 100644 --- a/drivers/mtd/nand/docg4.c +++ b/drivers/mtd/nand/docg4.c @@ -977,13 +977,13 @@ static int write_page(struct mtd_info *mtd, struct nand_chip *nand, } static int docg4_write_page_raw(struct mtd_info *mtd, struct nand_chip *nand, - const uint8_t *buf, int oob_required) + const uint8_t *buf, int oob_required, int page) { return write_page(mtd, nand, buf, false); } static int docg4_write_page(struct mtd_info *mtd, struct nand_chip *nand, - const uint8_t *buf, int oob_required) + const uint8_t *buf, int oob_required, int page) { return write_page(mtd, nand, buf, true); } @@ -1113,7 +1113,7 @@ static int docg4_block_markbad(struct mtd_info *mtd, loff_t ofs) /* write first page of block */ write_page_prologue(mtd, g4_addr); - docg4_write_page(mtd, nand, buf, 1); + docg4_write_page(mtd, nand, buf, 1, page); ret = pageprog(mtd); kfree(buf); |