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linux-next/drivers/mtd
Artem Bityutskiy 7ac760c2f7 UBI: fix corrupted PEB detection for NOR flash
My new shiny code for corrupted PEB detection has NOR specific bug.
We tread PEB as corrupted and preserve it, if

1. EC header is OK.
2. VID header is corrupted.
3. data area is not "all 0xFFs"

In case of NOR we have 'nor_erase_prepare()' quirk, which invalidates
the headers before erasing the PEB. And we invalidate first the VID
header, and then the EC header. So if a power cut happens after we have
invalidated the VID header, but before we have invalidated the EC
header, we end up with a PEB which satisfies the above 3 conditions,
and the scanning code will treat it as corrupted, and will print
scary warnings, wrongly.

This patch fixes the issue by firt invalidating the EC header, then
invalidating the VID header. In case of power cut inbetween, we still
just lose the EC header, and UBI can deal with this situation gracefully.

Thanks to Anatolij Gustschin <agust@denx.de> for tracking this down.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Reported-by: Anatolij Gustschin <agust@denx.de>
Tested-by: Anatolij Gustschin <agust@denx.de>
2010-12-03 15:49:21 +02:00
..
chips Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git 2010-10-30 12:35:11 +01:00
devices mtd: fix build error in m25p80.c 2010-10-30 12:46:08 +01:00
lpddr mtd: change struct flchip_shared spinlock locking into mutex 2010-08-06 09:22:16 +01:00
maps Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git 2010-10-30 12:35:11 +01:00
nand Merge git://git.infradead.org/mtd-2.6 2010-10-30 08:31:35 -07:00
onenand mtd: OneNAND: S5PC110: Fix double call suspend & resume function 2010-10-25 01:36:14 +01:00
tests mtd: tests: return -1 if verify failed 2010-08-02 09:06:20 +01:00
ubi UBI: fix corrupted PEB detection for NOR flash 2010-12-03 15:49:21 +02:00
afs.c mtd: Update copyright notices 2010-08-08 20:58:20 +01:00
ar7part.c [MTD] mtdpart: Make all partition parsers return allocated array 2009-03-20 18:55:17 +00:00
cmdlinepart.c mtd: Update copyright notices 2010-08-08 20:58:20 +01:00
ftl.c Update broken web addresses in the kernel. 2010-10-18 11:03:14 +02:00
inftlcore.c mtd: Update copyright notices 2010-08-08 20:58:20 +01:00
inftlmount.c mtd: Remove obsolete <mtd/compatmac.h> include 2010-08-08 21:19:42 +01:00
Kconfig mtd: update description on sm_ftl 2010-08-06 09:21:40 +01:00
Makefile Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 2010-05-10 14:32:46 +01:00
mtd_blkdevs.c mtd: Remove redundant mutex from mtd_blkdevs.c 2010-10-30 12:39:21 +01:00
mtdblock_ro.c mtd: Update copyright notices 2010-08-08 20:58:20 +01:00
mtdblock.c mtd: Update copyright notices 2010-08-08 20:58:20 +01:00
mtdchar.c Merge git://git.infradead.org/mtd-2.6 2010-10-30 08:31:35 -07:00
mtdconcat.c mtd: Update copyright notices 2010-08-08 20:58:20 +01:00
mtdcore.c mtd: Remove obsolete <mtd/compatmac.h> include 2010-08-08 21:19:42 +01:00
mtdcore.h mtd: Replace static array of devices with an idr structure 2010-02-25 11:55:14 +00:00
mtdoops.c mtd: Update copyright notices 2010-08-08 20:58:20 +01:00
mtdpart.c mtd: prepare partition add and del functions for ioctl requests 2010-10-25 00:47:37 +01:00
mtdsuper.c convert get_sb_mtd() users to ->mount() 2010-10-29 04:16:26 -04:00
nftlcore.c mtd: Update copyright notices 2010-08-08 20:58:20 +01:00
nftlmount.c mtd: Update copyright notices 2010-08-08 20:58:20 +01:00
ofpart.c mtd: Fix endianness issues from device tree 2010-10-25 00:55:56 +01:00
redboot.c mtd: Update copyright notices 2010-08-08 20:58:20 +01:00
rfd_ftl.c mtd: Update copyright notices 2010-08-08 20:58:20 +01:00
sm_ftl.c bitops: rename for_each_bit() to for_each_set_bit(): mtd 2010-04-08 09:42:41 +01:00
sm_ftl.h mtd: sm_ftl: cosmetic, use bool when possible 2010-10-25 01:33:08 +01:00
ssfdc.c mtd: Update copyright notices 2010-08-08 20:58:20 +01:00