diff options
| author | Brian Norris <computersforpeace@gmail.com> | 2012-05-02 21:14:55 +0400 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2012-05-14 08:20:00 +0400 |
| commit | 1fbb938dff5b6bb4514a4e7600276b03c7f08e25 (patch) | |
| tree | 49ab8089580041bcbd767ff7a57aa7188ee6b6c0 /drivers/mtd/nand/bcm_umi_nand.c | |
| parent | b4f7aa84d6ff44327ab91a2973ebf0c2a7797d24 (diff) | |
| download | linux-1fbb938dff5b6bb4514a4e7600276b03c7f08e25.tar.xz | |
mtd: nand: add 'oob_required' argument to NAND {read,write}_page interfaces
New NAND controllers can perform read/write via HW engines which don't expose
OOB data in their DMA mode. To reflect this, we should rework the nand_chip /
nand_ecc_ctrl interfaces that assume that drivers will always read/write OOB
data in the nand_chip.oob_poi buffer. A better interface includes a boolean
argument that explicitly tells the callee when OOB data is requested by the
calling layer (for reading/writing to/from nand_chip.oob_poi).
This patch adds the 'oob_required' parameter to each relevant {read,write}_page
interface; all 'oob_required' parameters are left unused for now. The next
patch will set the parameter properly in the nand_base.c callers, and follow-up
patches will make use of 'oob_required' in some of the callee functions.
Note that currently, there is no harm in ignoring the 'oob_required' parameter
and *always* utilizing nand_chip.oob_poi, but there can be
performance/complexity/design benefits from avoiding filling oob_poi in the
common case. I will try to implement this for some drivers which can be ported
easily.
Note: I couldn't compile-test all of these easily, as some had ARCH
dependencies.
[dwmw2: Merge later 1/0 vs. true/false cleanup]
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Shmulik Ladkani <shmulik.ladkani@gmail.com>
Acked-by: Jiandong Zheng <jdzheng@broadcom.com>
Acked-by: Mike Dunn <mikedunn@newsguy.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/mtd/nand/bcm_umi_nand.c')
| -rw-r--r-- | drivers/mtd/nand/bcm_umi_nand.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/mtd/nand/bcm_umi_nand.c b/drivers/mtd/nand/bcm_umi_nand.c index 7134adfa1089..c855e7cd337b 100644 --- a/drivers/mtd/nand/bcm_umi_nand.c +++ b/drivers/mtd/nand/bcm_umi_nand.c @@ -341,7 +341,7 @@ static int bcm_umi_nand_verify_buf(struct mtd_info *mtd, const u_char * buf, * for MLC parts which may have permanently stuck bits. */ struct nand_chip *chip = mtd->priv; - int ret = chip->ecc.read_page(mtd, chip, readbackbuf, 0); + int ret = chip->ecc.read_page(mtd, chip, readbackbuf, 0, 0); if (ret < 0) return -EFAULT; else { |