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NeilBrown 0ca69886a8 md: Ensure no IO request to get md device before it is properly initialised. 
When an md device is in the process of coming on line it is possible
for an IO request (typically a partition table probe) to get through
before the array is fully initialised, which can cause unexpected
behaviour (e.g. a crash).

So explicitly record when the array is ready for IO and don't allow IO
through until then.

There is no possibility for a similar problem when the array is going
off-line as there must only be one 'open' at that time, and it is busy
off-lining the array and so cannot send IO requests.  So no memory
barrier is needed in md_stop()

This has been a bug since commit 409c57f380 in 2.6.30 which
introduced md_make_request.  Before then, each personality would
register its own make_request_fn when it was ready.
This is suitable for any stable kernel from 2.6.30.y onwards.

Cc: <stable@kernel.org>
Signed-off-by: NeilBrown <neilb@suse.de>
Reported-by:  "Hawrylewicz Czarnowski, Przemyslaw" <przemyslaw.hawrylewicz.czarnowski@intel.com>
2011-01-14 09:14:33 +11:00
..
accessibility
acpi Merge branches 'bugzilla-25412' and 'bugzilla-25302' into release 2010-12-26 17:05:07 -05:00
amba
ata pata_cs5536: avoid implicit MSR API inclusion on x86-64 2010-12-26 19:42:15 -05:00
atm drivers/atm/atmtcp.c: add missing atm_dev_put 2010-12-31 12:52:05 -08:00
auxdisplay
base PM: Allow devices to be removed during late suspend and early resume 2010-11-11 01:50:53 +01:00
block Fix build error in drivers/block/cciss.c 2010-12-20 21:21:49 -08:00
bluetooth Bluetooth: add NULL pointer check in HCI 2010-12-08 13:22:22 -02:00
cdrom
char RAMOOPS: Don't overflow over non-allocated regions 2010-12-28 11:12:32 -08:00
clocksource clocksource: sh_cmt: Remove nested spinlock fix 2010-12-17 19:38:33 +09:00
connector connector: add module alias 2010-12-10 12:27:49 -08:00
cpufreq
cpuidle
crypto Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2010-11-13 09:55:56 -08:00
dca
dio
dma Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx 2011-01-03 11:48:54 -08:00
edac amd64_edac: Fix interleaving check 2010-12-08 19:52:54 +01:00
eisa
firewire firewire: ohci: fix regression with Agere FW643 rev 06, disable MSI 2010-12-12 15:47:02 +01:00
firmware
gpio cs5535-gpio: handle GPIO regs where higher (clear) bits are set 2010-12-23 15:31:48 -08:00
gpu drm/i915/dvo: Report LVDS attached to ch701x as connected 2010-12-30 13:50:43 +00:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2010-12-02 17:40:04 -08:00
hwmon hwmon: (s3c-hwmon) Fix compilation 2011-01-02 15:31:11 -08:00
i2c i2c_intel_mid: Fix slash in sysfs name 2010-12-14 18:46:01 -08:00
ide
idle intel_idle: recognize ARAT on WSM-EX 2010-12-02 01:19:32 -05:00
ieee802154
infiniband IB/uverbs: Handle large number of entries in poll CQ 2010-12-08 15:23:49 -08:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2010-12-16 08:33:44 -08:00
isdn ISDN, Gigaset: Fix memory leak in do_disconnect_req() 2010-12-31 11:17:10 -08:00
leds led_class: fix typo in blink API 2010-12-22 19:43:34 -08:00
lguest
macintosh leds: fix up dependencies 2010-12-02 14:51:15 -08:00
mca
md md: Ensure no IO request to get md device before it is properly initialised. 2011-01-14 09:14:33 +11:00
media [media] em28xx: radio_fops should also use unlocked_ioctl 2011-01-03 09:52:25 -02:00
memstick
message SCSI host lock push-down 2010-11-16 13:33:23 -08:00
mfd mfd: Support additional parent IDs for wm831x 2010-12-22 12:05:22 +01:00
misc drivers/misc/isl29020.c: remove incorrect kfree in isl29020_remove() 2010-11-25 06:50:47 +09:00
mmc mmc: Fix re-probing with PM_POST_RESTORE notification 2010-12-21 11:46:49 -08:00
mtd Merge branch 'omap-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6 2010-12-14 17:36:35 -08:00
net atl1: fix oops when changing tx/rx ring params 2011-01-03 11:04:49 -08:00
nubus
of of/i2c: Fix request module by alias 2010-12-24 01:28:54 -07:00
oprofile
parisc parisc: KittyHawk LCD fix 2010-12-04 11:18:25 -05:00
parport
pci PCI hotplug: Fix unexpected driver unregister in pciehp_acpi.c 2010-12-23 12:51:49 -08:00
pcmcia ARM: 6456/1: Fix for building DEBUG with sa11xx_base.c as a module. 2010-12-04 12:47:48 +00:00
platform drm/i915, intel_ips: When i915 loads after IPS, make IPS relink to i915. 2010-12-23 09:51:36 +00:00
pnp ACPI/PNP: avoid section mismatch warning 2010-12-11 02:01:47 -05:00
power
pps
ps3
rapidio rapidio: use resource_size() 2010-11-12 07:55:30 -08:00
regulator regulator: tps6586x: correct register table 2010-12-09 09:23:43 +00:00
rtc rtc: rs5c372: fix buffer size 2010-12-22 19:43:34 -08:00
s390 [SCSI] zfcp: Issue FCP command without holding SCSI host_lock 2010-12-09 09:41:23 -06:00
sbus
scsi Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6 2010-12-24 12:58:43 -08:00
serial Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb 2010-12-14 14:35:04 -08:00
sfi
sh sh: intc: Initialize radix tree gfp mask explicitly. 2010-12-24 19:38:37 +09:00
sn
spi spi/m68knommu: Coldfire QSPI platform support 2010-12-29 23:28:25 -07:00
ssb ssb: b43-pci-bridge: Add new vendor for BCM4318 2010-11-22 15:19:31 -05:00
staging Revert "Staging: zram: work around oops due to startup ordering snafu" 2010-12-30 12:07:22 -08:00
tc
telephony
thermal
tty n_gsm: gsm_data_alloc buffer allocation could fail and it is not being checked 2010-12-16 13:03:13 -08:00
uio uio: Change mail address of Hans J. Koch 2010-11-10 16:57:11 -08:00
usb ueagle-atm: fix PHY signal initialization race 2010-12-28 13:41:41 -08:00
uwb UWB: Return UWB_RSV_ALLOC_NOT_FOUND rather than crashing on NULL dereference if kzalloc fails 2010-11-11 07:14:07 -08:00
vhost vhost: correctly set bits of dirty pages 2010-11-29 10:26:55 +02:00
video Merge branch 'fbdev-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/fbdev-2.6 2010-12-27 10:33:30 -08:00
virtio virtio: fix format of sysfs driver/vendor files 2010-11-24 15:21:12 +10:30
vlynq
w1
watchdog watchdog: Fix null pointer dereference while accessing rdc321x platform_data 2010-12-22 12:05:21 +01:00
xen Merge branch '2.6.37-rc4-pvhvm-fixes' of git://xenbits.xen.org/people/sstabellini/linux-pvhvm 2010-12-03 11:30:57 -08:00
zorro BKL: remove extraneous #include <smp_lock.h> 2010-11-17 08:59:32 -08:00
Kconfig
Makefile TTY: create drivers/tty and move the tty core files there 2010-11-05 08:10:33 -07:00