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linux-sg2042/drivers/mtd/nand
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Brian Norris 6d77b9d0af mtd: nand: invalidate cache on unaligned reads 
In rare cases, we are given an unaligned parameter `from' in
`nand_do_read_ops()'. In such cases, we use the page cache
(chip->buffers->databuf) as an intermediate buffer before dumping to the
client buffer. However, there are also cases where this buffer is not
cleanly reusable. In those cases, we need to make sure that we
explicitly invalidate the cache.

This patch prevents accidental reusage of the page cache, and for me,
this solves some problems I come across when reading a corrupted BBT
from flash (NAND_BBT_USE_FLASH and NAND_BBT_NO_OOB).

Note: the rare "unaligned" case is a result of the extra BBT pattern +
version located in the data area instead of OOB.

Also, this patch disables caching on raw reads, since we are reading
without error correction. This is, obviously, prone to errors and should
not be cached.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@intel.com>
 		2011-09-21 09:19:08 +03:00
..
gpmi-nand mtd: rename MTD_OOB_* to MTD_OPS_* 2011-09-11 15:28:59 +03:00
Kconfig mtd: add GPMI-NAND driver in the config and Makefile 2011-09-11 15:02:18 +03:00
Makefile mtd: add GPMI-NAND driver in the config and Makefile 2011-09-11 15:02:18 +03:00
alauda.c mtd: convert remaining users to mtd_device_register() 2011-05-25 02:25:00 +01:00
ams-delta.c mtd: convert remaining users to mtd_device_register() 2011-05-25 02:25:00 +01:00
atmel_nand.c mtd: atmel_nand: optimize read/write buffer functions 2011-09-11 15:02:15 +03:00
atmel_nand_ecc.h [ARM] 5265/3: [AT91] Add copyright info 2008-09-21 23:01:18 +01:00
au1550nd.c mtd: spelling, capitalization, uniformity 2011-09-11 15:02:13 +03:00
autcpu12.c mtd: nand: rename NAND_USE_FLASH_BBT 2011-09-11 15:01:56 +03:00
bcm_umi_bch.c mtd: add bcmring nand driver 2009-10-20 10:07:23 +09:00
bcm_umi_nand.c mtd: bcm_umi_nand: clean up error handling code 2011-09-11 15:02:17 +03:00
bf5xx_nand.c mtd: bf5xx_nand: convert to mtd_device_register() 2011-05-25 02:23:15 +01:00
cafe_nand.c mtd: spelling, capitalization, uniformity 2011-09-11 15:02:13 +03:00
cmx270_nand.c mtd: cmx270_nand.c: use mtd_device_parse_register 2011-09-11 15:02:08 +03:00
cs553x_nand.c mtd: cs553x_nand.c: use mtd_device_parse_register 2011-09-11 15:02:08 +03:00
davinci_nand.c mtd: davinci_nand.c: use mtd_device_parse_register 2011-09-11 15:02:08 +03:00
denali.c mtd: denali: detect the number of banks before resetting NAND 2011-09-11 15:02:04 +03:00
denali.h mtd: denali: detect the number of banks 2011-05-25 02:02:12 +01:00
diskonchip.c mtd: utilize `mtd_is_*()' functions 2011-09-21 09:19:06 +03:00
fsl_elbc_nand.c mtd: eLBC NAND: update ecc_stats.corrected when lteccr available 2011-09-11 15:02:17 +03:00
fsl_upm.c mtd: fsl_upm: fix a memory leak in fun_chip_init error path 2011-09-11 15:02:14 +03:00
fsmc_nand.c mtd: fsmc_nand.c: use mtd_device_parse_register 2011-09-11 15:02:08 +03:00
gpio.c mtd: convert remaining users to mtd_device_register() 2011-05-25 02:25:00 +01:00
h1910.c mtd: h1910.c: use mtd_device_parse_register 2011-09-11 15:02:08 +03:00
jz4740_nand.c mtd: jz4740_nand.c: use mtd_device_parse_register 2011-09-11 15:02:08 +03:00
mpc5121_nfc.c mtd: mpc5121_nfc.c: use mtd_device_parse_register 2011-09-11 15:02:12 +03:00
mxc_nand.c mtd: mxc_nand: add mx53 NFC driver support 2011-09-11 15:02:17 +03:00
nand_base.c mtd: nand: invalidate cache on unaligned reads 2011-09-21 09:19:08 +03:00
nand_bbt.c mtd: nand: do not scan bad blocks with NAND_BBT_NO_OOB set 2011-09-21 09:19:08 +03:00
nand_bch.c mtd: cleanup style on pr_debug messages 2011-09-11 15:02:16 +03:00
nand_bcm_umi.c mtd: add bcmring nand driver 2009-10-20 10:07:23 +09:00
nand_bcm_umi.h mtd: nand_bcm: fix hot spin and code duplication 2010-02-26 16:56:35 +00:00
nand_ecc.c mtd: spelling, capitalization, uniformity 2011-09-11 15:02:13 +03:00
nand_ids.c mtd: nand: support new Toshiba SLC 2010-10-24 23:38:30 +01:00
nandsim.c mtd: nand: rename NAND_USE_FLASH_BBT 2011-09-11 15:01:56 +03:00
ndfc.c mtd: ndfc.c: use mtd_device_parse_register 2011-09-11 15:02:12 +03:00
nomadik_nand.c mtd: nomadik_nand: add missing nand_release in nomadik_nand_remove 2011-09-11 15:01:59 +03:00
nuc900_nand.c mtd: nuc900_nand: add missing nand_release in nuc900_nand_remove 2011-09-11 15:01:58 +03:00
omap2.c mtd: cleanup style on pr_debug messages 2011-09-11 15:02:16 +03:00
orion_nand.c mtd: orion_nand.c: use mtd_device_parse_register 2011-09-11 15:02:09 +03:00
pasemi_nand.c mtd: nand: rename NAND_USE_FLASH_BBT 2011-09-11 15:01:56 +03:00
plat_nand.c mtd: plat_nand.c: use mtd_device_parse_register 2011-09-11 15:02:09 +03:00
ppchameleonevb.c mtd: ppchameleonevb.c: use mtd_device_parse_register 2011-09-11 15:02:09 +03:00
pxa3xx_nand.c mtd: pxa3xx_nand: enable multiple chip select support 2011-09-11 15:02:15 +03:00
r852.c Fix common misspellings 2011-03-31 11:26:23 -03:00
r852.h mtd: r852: remove useless pci powerup/down from suspend/resume routines 2010-10-25 01:32:21 +01:00
rtc_from4.c mtd: replace DEBUG() with pr_debug() 2011-09-11 15:02:16 +03:00
s3c2410.c mtd: s3c2410 nand: Remove uncessary null check 2011-09-11 15:02:17 +03:00
sh_flctl.c mtd: convert remaining users to mtd_device_register() 2011-05-25 02:25:00 +01:00
sharpsl.c mtd: sharpsl.c: use mtd_device_parse_register 2011-09-11 15:02:09 +03:00
sm_common.c mtd: rename MTD_OOB_* to MTD_OPS_* 2011-09-11 15:28:59 +03:00
sm_common.h mtd: sm_common: split smartmedia and xD table 2010-05-14 01:03:46 +01:00
socrates_nand.c mtd: socrates_nand.c: use mtd_device_parse_register 2011-09-11 15:02:13 +03:00
spia.c mtd: convert remaining users to mtd_device_register() 2011-05-25 02:25:00 +01:00
tmio_nand.c mtd: tmio_nand.c: use mtd_device_parse_register 2011-09-11 15:02:09 +03:00
txx9ndfmc.c mtd: txx9ndfmc.c: use mtd_device_parse_register 2011-09-11 15:02:09 +03:00