pekon gupta 9bdc502feb mtd: nand: omap: fix BCHx ecc.correct to return detected bit-flips in erased-page ...

commit f306e8c3b6 upstream.

fixes: commit 62116e5171
       mtd: nand: omap2: Support for hardware BCH error correction.

In omap_elm_correct_data(), if bitflip_count in an erased-page is within the
correctable limit (< ecc.strength), then it is not indicated back to the caller
ecc->read_page().

This mis-guides upper layers like MTD and UBIFS layer to assume erased-page as
perfectly clean and use it for writing even if actual bitflip_count was
dangerously high (bitflip_count > mtd->bitflip_threshold).

This patch fixes this above issue, by returning 'stats' to caller
ecc->read_page() under all scenarios.

Reported-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Pekon Gupta <pekon@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2014-07-09 11:14:00 -07:00

..

chips

Merge tag 'for-linus-20130509' of git://git.infradead.org/linux-mtd

2013-05-09 10:15:46 -07:00

devices

mtd: dataflash: Use of_match_ptr() macro

2013-04-05 13:19:51 +01:00

lpddr

…

maps

Merge tag 'for-linus-20130509' of git://git.infradead.org/linux-mtd

2013-05-09 10:15:46 -07:00

nand

mtd: nand: omap: fix BCHx ecc.correct to return detected bit-flips in erased-page

2014-07-09 11:14:00 -07:00

onenand

Merge tag 'for-linus-20130509' of git://git.infradead.org/linux-mtd

2013-05-09 10:15:46 -07:00

tests

Merge tag 'for-linus-20130301' of git://git.infradead.org/linux-mtd

2013-03-02 16:33:54 -08:00

ubi

UBI: Fix PEB leak in wear_leveling_worker()

2013-09-26 17:18:01 -07:00

afs.c

…

ar7part.c

mtd: Allow removal of partitioning modules

2013-02-04 09:27:33 +02:00

bcm47xxpart.c

mtd: bcm47xxpart: look for NVRAM at the end of device

2013-03-08 11:36:00 +00:00

bcm63xxpart.c

mtd: bcm63xxpart: use correct printk format for partitions

2012-11-21 17:15:06 +02:00

cmdlinepart.c

mtd: Allow removal of partitioning modules

2013-02-04 09:27:33 +02:00

ftl.c

…

inftlcore.c

…

inftlmount.c

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Kconfig

mtd: merge mtdchar module with mtdcore

2013-04-05 13:16:54 +01:00

Makefile

mtd: merge mtdchar module with mtdcore

2013-04-05 13:16:54 +01:00

mtd_blkdevs.c

block_device_operations->release() should return void

2013-05-07 02:16:21 -04:00

mtdblock_ro.c

…

mtdblock.c

mtd_blktrans_ops->release() should return void

2013-05-05 21:31:22 -04:00

mtdchar.c

Merge tag 'for-linus-20130509' of git://git.infradead.org/linux-mtd

2013-05-09 10:15:46 -07:00

mtdconcat.c

…

mtdcore.c

Merge tag 'for-linus-20130509' of git://git.infradead.org/linux-mtd

2013-05-09 10:15:46 -07:00

mtdcore.h

mtd: merge mtdchar module with mtdcore

2013-04-05 13:16:54 +01:00

mtdoops.c

mtdoops: don't erase flash at each boot

2012-11-15 15:37:51 +02:00

mtdpart.c

mtd: mtdcore: use const qualifier

2013-04-05 13:04:27 +01:00

mtdsuper.c

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mtdswap.c

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nftlcore.c

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nftlmount.c

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ofpart.c

mtd: ofpart: support partitions of 4 GiB and larger

2013-04-05 12:05:53 +01:00

redboot.c

…

rfd_ftl.c

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sm_ftl.c

mtd: sm_ftl: heap corruption in sm_create_sysfs_attributes()

2014-05-13 13:59:45 +02:00

sm_ftl.h

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ssfdc.c

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