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NeilBrown 9eb07c2592 md: fix 'degraded' calculation when starting a reshape. 
This code was written long ago when it was not possible to
reshape a degraded array.  Now it is so the current level of
degraded-ness needs to be taken in to account.  Also newly addded
devices should only reduce degradedness if they are deemed to be
in-sync.

In particular, if you convert a RAID5 to a RAID6, and increase the
number of devices at the same time, then the 5->6 conversion will
make the array degraded so the current code will produce a wrong
value for 'degraded' - "-1" to be precise.

If the reshape runs to completion end_reshape will calculate a correct
new value for 'degraded', but if a device fails during the reshape an
incorrect decision might be made based on the incorrect value of
"degraded".

This patch is suitable for 2.6.32-stable and if they are still open,
2.6.31-stable and 2.6.30-stable as well.

Cc: stable@kernel.org
Reported-by: Michael Evans <mjevans1983@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>
2010-02-09 16:34:29 +11:00
..
accessibility
acpi Merge branch 'bugzilla-14954' into release 2010-01-20 01:26:22 -05:00
amba
ata [libata] Call flush_dcache_page after PIO data transfers in libata-sff.c 2010-02-04 01:04:50 -05:00
atm
auxdisplay
base Revert "sysdev: fix prototype for memory_sysdev_class show/store functions" 2010-01-20 15:02:13 -08:00
block pktcdvd: removing device does not remove its sysfs dir 2010-02-02 18:11:23 -08:00
bluetooth Bluetooth: Add DFU driver for Atheros Bluetooth chipset AR3011 2010-01-30 05:57:34 -08:00
cdrom
char Fix race in tty_fasync() properly 2010-02-07 10:26:01 -08:00
clocksource
connector connector: Delete buggy notification code. 2010-02-02 15:58:48 -08:00
cpufreq
cpuidle drivers/cpuidle/governors/menu.c: fix undefined reference to `__udivdi3' 2010-01-11 09:34:07 -08:00
crypto crypto: padlock-sha - Add import/export support 2010-02-02 06:50:25 +11:00
dca
dio
dma
edac edac: i5000_edac critical fix panic out of bounds 2010-01-16 12:15:38 -08:00
eisa
firewire firewire: ohci: fix crashes with TSB43AB23 on 64bit systems 2010-01-27 18:24:53 +01:00
firmware
gpio gpio: adp5588-gpio: new driver for ADP5588 GPIO expanders 2010-01-11 09:34:07 -08:00
gpu Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/anholt/drm-intel 2010-02-06 13:01:39 -08:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2010-01-13 16:10:13 -08:00
hwmon hwmon: (w83781d) Request I/O ports individually for probing 2010-02-05 19:58:36 +01:00
i2c i2c: imx: call ioremap only after request_mem_region 2010-01-24 15:25:57 +00:00
ide
idle
ieee1394
ieee802154
infiniband Fix failure exit in ipathfs 2010-01-26 22:22:27 -05:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2010-01-29 11:15:32 -08:00
isdn Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2010-01-12 20:53:29 -08:00
leds
lguest
macintosh powerpc/macintosh: Make Open Firmware device id constant 2010-01-15 13:26:04 +11:00
mca
md md: fix 'degraded' calculation when starting a reshape. 2010-02-09 16:34:29 +11:00
media saa7146: stop DMA before de-allocating DMA scatter/gather page buffers 2010-02-01 22:02:03 -02:00
memstick
message [SCSI] mptsas: Fix issue with chain pools allocation on katmai 2010-01-17 12:16:17 -06:00
mfd mfd: Fix asic3 build 2010-01-29 21:03:09 +01:00
misc
mmc mfd: tmio_mmc hardware abstraction for CNF area 2010-01-18 12:30:27 +01:00
mtd Merge branch 'for-linus' of git://git.infradead.org/ubi-2.6 2010-01-28 12:57:50 -08:00
net be2net: use eq-id to calculate cev-isr reg offset 2010-02-02 07:48:40 -08:00
nubus
of
oprofile
parisc
parport
pci CS5536: apply pci quirk for BIOS SMBUS bug 2010-02-05 07:36:50 -08:00
pcmcia
platform Merge branch 'misc' into release 2010-01-20 01:23:27 -05:00
pnp
power
pps
ps3
rapidio
regulator regulator: Specify REGULATOR_CHANGE_STATUS for WM835x LED constraints 2010-02-01 13:52:44 +00:00
rtc rtc-fm3130: add missing braces 2010-02-02 18:11:21 -08:00
s390 Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6 2010-01-27 09:54:08 -08:00
sbus bbc_envctrl: Clean up properly if kthread_run() fails. 2010-01-04 15:31:10 -08:00
scsi [SCSI] aic79xx: check for non-NULL scb in ahd_handle_nonpkt_busfree 2010-01-17 12:48:12 -06:00
serial uartlite: fix crash when using as console 2010-02-02 18:11:22 -08:00
sfi
sh
sn
spi spi: spi_sh_msiof: Fixed data sampling on the correct edge 2010-02-02 11:29:15 +09:00
ssb
staging Merge branch 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 2010-02-01 10:46:49 -08:00
tc
telephony
thermal
uio
usb usb: r8a66597-hdc disable interrupts fix 2010-02-02 11:30:45 +09:00
uwb
video imxfb: correct location of callbacks in suspend and resume 2010-02-02 18:11:22 -08:00
virtio virtio: fix section mismatch warnings 2010-01-16 12:15:39 -08:00
vlynq
w1
watchdog [WATCHDOG] sbc_fitpc2_wdt: fix I/O space access technique. 2010-01-25 19:48:49 +00:00
xen xen: fix hang on suspend. 2010-01-13 10:01:35 +00:00
zorro
Kconfig
Makefile