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authorBrian Norris <computersforpeace@gmail.com>2011-08-31 05:45:38 +0400
committerArtem Bityutskiy <artem.bityutskiy@intel.com>2011-09-11 16:13:38 +0400
commitc46f6483d21e93400e4a110de7902830173d53b0 (patch)
treebac45575c58963f4bc35d13b188c8ff5a32c9823 /include/mtd
parente9195edc59f33e9cabdd32a2959e927806670f45 (diff)
downloadlinux-c46f6483d21e93400e4a110de7902830173d53b0.tar.xz
mtd: support reading OOB without ECC
This fixes issues with `nanddump -n' and the MEMREADOOB[64] ioctls on hardware that performs error correction when reading only OOB data. A driver for such hardware needs to know when we're doing a RAW vs. a normal write, but mtd_do_read_oob does not pass such information to the lower layers (e.g., NAND). We should pass MTD_OOB_RAW or MTD_OOB_PLACE based on the MTD file mode. For now, most drivers can get away with just setting: chip->ecc.read_oob_raw = chip->ecc.read_oob This is done by default; but for systems that behave as described above, you must supply your own replacement function. This was tested with nandsim as well as on actual SLC NAND. Signed-off-by: Brian Norris <computersforpeace@gmail.com> Cc: Jim Quinlan <jim2101024@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@intel.com>
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