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f306e8c3b6
linux/drivers/mtd
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pekon gupta f306e8c3b6 mtd: nand: omap: fix BCHx ecc.correct to return detected bit-flips in erased-page 
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>
Cc: <stable@vger.kernel.org> # 3.9.x+
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-20 16:32:17 -07:00
..
chips mtd: Add a retlen parameter to _get_{fact,user}_prot_info 2014-03-10 22:42:28 -07:00
devices mtd: m25p80: Revive dual read support 2014-05-12 13:16:26 -07:00
lpddr mtd: lpddr: Remove unnecessary OOM messages 2014-03-10 22:42:24 -07:00
maps mtd: Fix Elan SC520 dependencies 2014-05-12 11:55:53 -07:00
nand mtd: nand: omap: fix BCHx ecc.correct to return detected bit-flips in erased-page 2014-05-20 16:32:17 -07:00
onenand mtd: Add a retlen parameter to _get_{fact,user}_prot_info 2014-03-10 22:42:28 -07:00
spi-nor mtd: spi-nor: Enable Dual and Quad SPI read transfers for s25sl032p 2014-05-12 13:16:26 -07:00
tests mtd: mtd_oobtest: generate consistent data for verification 2014-04-17 22:22:03 -07:00
ubi MTD updates for 3.15: 2014-04-07 10:17:30 -07:00
afs.c mtd: make register_mtd_parser return void 2014-01-03 11:22:22 -08:00
ar7part.c mtd: make register_mtd_parser return void 2014-01-03 11:22:22 -08:00
bcm47xxpart.c mtd: bcm47xxpart: allow enabling on ARCH_BCM_5301X 2014-03-10 22:42:29 -07:00
bcm63xxpart.c mtd: make register_mtd_parser return void 2014-01-03 11:22:22 -08:00
cmdlinepart.c mtd: make register_mtd_parser return void 2014-01-03 11:22:22 -08:00
ftl.c mtd: do not use mtd->sync directly 2012-01-09 18:26:21 +00:00
inftlcore.c mtd: nand: add a helper to detect the nand type 2013-10-27 16:27:06 -07:00
inftlmount.c mtd: delete non-required instances of include <linux/init.h> 2014-03-10 22:42:22 -07:00
Kconfig mtd: spi-nor: add the framework for SPI NOR 2014-04-14 11:22:58 -07:00
Makefile mtd: spi-nor: shorten Kconfig naming 2014-04-14 11:23:01 -07:00
mtd_blkdevs.c mtd: mtd_blkdevs: handle REQ_FLUSH request and do explicit flush of writeback buffer 2014-04-15 23:25:37 -07:00
mtdblock_ro.c mtd: Move major number definitions to major.h 2013-11-06 23:32:59 -08:00
mtdblock.c mtd: Move major number definitions to major.h 2013-11-06 23:32:59 -08:00
mtdchar.c mtd: Fix the behavior of OTP write if there is not enough room for data 2014-03-10 22:42:31 -07:00
mtdconcat.c mtd: unify initialization of erase_info->fail_addr 2012-03-27 01:02:24 +01:00
mtdcore.c mtd: Fix the behavior of OTP write if there is not enough room for data 2014-03-10 22:42:31 -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: Add a retlen parameter to _get_{fact,user}_prot_info 2014-03-10 22:42:28 -07:00
mtdsuper.c mtd: Move major number definitions to major.h 2013-11-06 23:32:59 -08:00
mtdswap.c mtd: mtdswap: replace strict_strtoul() with kstrtoul() 2013-08-30 21:52:51 +01:00
nftlcore.c mtd: nand: add a helper to detect the nand type 2013-10-27 16:27:06 -07:00
nftlmount.c mtd: introduce mtd_block_markbad interface 2012-01-09 18:25:48 +00:00
ofpart.c mtd: make register_mtd_parser return void 2014-01-03 11:22:22 -08:00
redboot.c mtd: make register_mtd_parser return void 2014-01-03 11:22:22 -08:00
rfd_ftl.c mtd: remove some duplicative checks 2014-03-10 22:42:25 -07:00
sm_ftl.c mtd: sm_ftl: heap corruption in sm_create_sysfs_attributes() 2014-03-10 22:42:21 -07:00
sm_ftl.h
ssfdc.c mtd: nand: add a helper to detect the nand type 2013-10-27 16:27:06 -07:00