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author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-10 10:51:35 +0900 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-10 10:51:35 +0900 |
commit | 10f39f04b2cb7a06ba5d4ea0f20bd156d0367bee (patch) | |
tree | 758f9736bcf0303da4edd5f52afd8ed10e8ea642 /drivers/mtd/mtdcore.c | |
parent | 72055425e53540d9d0e59a57ac8c9b8ce77b62d5 (diff) | |
parent | f5cf8f07423b2677cebebcebc863af77223a4972 (diff) | |
download | blackbird-op-linux-10f39f04b2cb7a06ba5d4ea0f20bd156d0367bee.tar.gz blackbird-op-linux-10f39f04b2cb7a06ba5d4ea0f20bd156d0367bee.zip |
Merge tag 'for-linus-20121009' of git://git.infradead.org/mtd-2.6
Pull MTD updates from David Woodhouse:
- Disable broken mtdchar mmap() on MMU systems
- Additional ECC tests for NAND flash, and some test cleanups
- New NAND and SPI chip support
- Fixes/cleanup for SH FLCTL NAND controller driver
- Improved hardware support for GPMI NAND controller
- Conversions to device-tree support for various drivers
- Removal of obsolete drivers (sbc8xxx, bcmring, etc.)
- New LPC32xx drivers for MLC and SLC NAND
- Further cleanup of NAND OOB/ECC handling
- UAPI cleanup merge from David Howells (just moving files, since MTD
headers were sorted out long ago to separate user-visible from kernel
bits)
* tag 'for-linus-20121009' of git://git.infradead.org/mtd-2.6: (168 commits)
mtd: Disable mtdchar mmap on MMU systems
UAPI: (Scripted) Disintegrate include/mtd
mtd: nand: detect Samsung K9GBG08U0A, K9GAG08U0F ID
mtd: nand: decode Hynix MLC, 6-byte ID length
mtd: nand: increase max OOB size to 640
mtd: nand: add generic READ ID length calculation functions
mtd: nand: split simple ID decode into its own function
mtd: nand: split extended ID decoding into its own function
mtd: nand: split BB marker options decoding into its own function
mtd: nand: remove redundant ID read
mtd: nand: remove unnecessary variable
mtd: docg4: add missing HAS_IOMEM dependency
mtd: gpmi: initialize the timing registers only one time
mtd: gpmi: add EDO feature for imx6q
mtd: gpmi: do not set the default values for the extra clocks
mtd: gpmi: simplify the DLL setting code
mtd: gpmi: add a new field for HW_GPMI_CTRL1
mtd: gpmi: do not get the clock frequency in gpmi_begin()
mtd: gpmi: add a new field for HW_GPMI_TIMING1
mtd: add helpers to get the supportted ONFI timing mode
...
Diffstat (limited to 'drivers/mtd/mtdcore.c')
-rw-r--r-- | drivers/mtd/mtdcore.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c index b9adff543f5f..374c46dff7dd 100644 --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c @@ -858,6 +858,27 @@ int mtd_panic_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, } EXPORT_SYMBOL_GPL(mtd_panic_write); +int mtd_read_oob(struct mtd_info *mtd, loff_t from, struct mtd_oob_ops *ops) +{ + int ret_code; + ops->retlen = ops->oobretlen = 0; + if (!mtd->_read_oob) + return -EOPNOTSUPP; + /* + * In cases where ops->datbuf != NULL, mtd->_read_oob() has semantics + * similar to mtd->_read(), returning a non-negative integer + * representing max bitflips. In other cases, mtd->_read_oob() may + * return -EUCLEAN. In all cases, perform similar logic to mtd_read(). + */ + ret_code = mtd->_read_oob(mtd, from, ops); + if (unlikely(ret_code < 0)) + return ret_code; + if (mtd->ecc_strength == 0) + return 0; /* device lacks ecc */ + return ret_code >= mtd->bitflip_threshold ? -EUCLEAN : 0; +} +EXPORT_SYMBOL_GPL(mtd_read_oob); + /* * Method to access the protection register area, present in some flash * devices. The user data is one time programmable but the factory data is read |