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50ec5babd3
linux/drivers
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Santosh Nayak 50ec5babd3 [SCSI] pm8001: Fix possible racing condition. 
There is a possble racing scenario.

'process_oq' is called by two routines, as shown below.

pm8001_8001_dispatch = {
         .......

        .isr             = pm8001_chip_isr --> process_oq,// A
        .isr_process_oq  = process_oq,                   //  B
        .....
}

process_oq() --> process_one_iomb() --> mpi_sata_completion()

In 'mpi_sata_completion', "pm8001_ha->lock" is first released.
It means lock is taken before,  which is true for
the context A, as 'pm8001_ha->lock' is taken in 'pm8001_chip_isr()'

But for context B there is no lock taken before and pm8001_ha->lock
is unlocked in 'mpi_sata_completion()'. This may unlock the lock
taken in context A. Possible racing ??

If 'pm8001_ha->lock' is taken in 'process_oq()' instead of
'pm8001_chip_isr' then the above issue can be avoided.

Signed-off-by: Santosh Nayak <santoshprasadnayak@gmail.com>
Acked-by: Jack Wang <jack_wang@usish.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-29 16:52:59 -06:00
..
accessibility module_param: make bool parameters really bool (drivers & misc) 2012-01-13 09:32:20 +10:30
acpi ACPI: remove duplicated lines of merging problems with acpi_processor_add 2012-02-08 15:07:03 -08:00
amba
ata [SCSI] libsas: async ata scanning 2012-02-29 15:35:41 -06:00
atm module_param: make bool parameters really bool (drivers & misc) 2012-01-13 09:32:20 +10:30
auxdisplay
base driver-core: cpu: fix kobject warning when hotplugging a cpu 2012-02-08 15:11:17 -08:00
bcma bcma: don't fail for bad SPROM CRC 2012-02-06 14:37:52 -05:00
block Merge branch 'for-linus' of git://git.kernel.dk/linux-block 2012-02-11 10:07:11 -08:00
bluetooth module_param: make bool parameters really bool (drivers & misc) 2012-01-13 09:32:20 +10:30
cdrom cdrom: move shared static to cdrom_device_info 2012-02-08 20:03:14 +01:00
char agp: fix scratch page cleanup 2012-01-26 18:36:48 +00:00
clk
clocksource
connector
cpufreq Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq 2012-01-11 18:53:33 -08:00
cpuidle
crypto Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2012-01-10 22:01:27 -08:00
dca
devfreq
dio
dma i.MX SDMA: Fix burstsize settings 2012-02-02 14:00:43 +05:30
edac module_param: make bool parameters really bool (drivers & misc) 2012-01-13 09:32:20 +10:30
eisa
firewire firewire: ohci: disable MSI on Ricoh controllers 2012-01-30 21:33:34 +01:00
firmware Merge commit '070680218379e15c1901f4bf21b98e3cbf12b527' into stable/for-linus-fixes-3.3 2012-01-12 11:53:55 -05:00
gpio gpio: Add missing spin_lock_init in gpio-ml-ioh driver 2012-02-01 21:59:37 -07:00
gpu Merge branch 'drm-intel-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/keithp/linux into drm-fixes 2012-02-10 08:35:19 +00:00
hid HID: wiimote: fix invalid power_supply_powers call 2012-02-07 13:40:56 +01:00
hv Merge branch 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb 2012-01-09 12:09:47 -08:00
hwmon hwmon: (f75375s) Let f75375_update_device treat pwmX as a measured value 2012-02-09 11:21:49 -08:00
hwspinlock
i2c i2c: OMAP: Fix OMAP1 build error 2012-01-20 08:24:22 -08:00
ide block: add and use scsi_blk_cmd_ioctl 2012-01-14 15:07:24 -08:00
idle ACPI processor hotplug: Delay acpi_processor_start() call for hotplugged cores 2012-01-19 21:26:32 -05:00
ieee802154
infiniband Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-02-10 14:18:46 -08:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2012-02-04 10:57:42 -08:00
iommu iommu/msm: Fix error handling in msm_iommu_unmap() 2012-01-30 12:53:14 +01:00
isdn isdn: type bug in isdn_net_header() 2012-02-09 15:41:29 -05:00
leds drivers/leds/leds-lm3530.c: fix setting pltfm->als_vmax 2012-02-08 19:03:51 -08:00
lguest lguest: Make sure interrupt is allocated ok by lguest_setup_irq 2012-01-12 15:44:47 +10:30
macintosh module_param: make bool parameters really bool (drivers & misc) 2012-01-13 09:32:20 +10:30
mca
md Some simple md-related fixes. 2012-02-08 19:06:30 -08:00
media Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media 2012-01-26 17:04:47 -08:00
memstick module_param: make bool parameters really bool (drivers & misc) 2012-01-13 09:32:20 +10:30
message SCSI updates for post 3.2 merge window 2012-01-10 10:36:08 -08:00
mfd mfd: Avoid twl6040-codec PLL reconfiguration when not needed 2012-02-03 19:03:50 +01:00
misc Minor char-misc fixes for 3.3-rc3 2012-02-09 13:51:13 -08:00
mmc drivers: misc: Remove MISC_DEVICES config option 2012-01-24 16:24:02 -08:00
mtd - Fix a regression in 16-bit Atmel NAND flash which was introduced in 3.1 2012-02-04 07:17:47 -08:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-02-10 14:18:46 -08:00
nfc
nubus
of 2nd set of device tree changes for v3.3 2012-01-14 13:25:55 -08:00
oprofile
parisc Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci 2012-01-11 18:50:26 -08:00
parport Autogenerated GPG tag for Rusty D1ADB8F1: 15EE 8D6C AB0E 7F0C F999 BFCB D920 0E6C D1AD B8F1 2012-01-14 12:32:16 -08:00
pci kernel-doc: fix new warnings in pci 2012-01-23 08:44:53 -08:00
pcmcia pcmcia: fix socket refcount decrementing on each resume 2012-02-08 19:03:51 -08:00
pinctrl pinctrl: add checks for empty function names 2012-01-26 14:13:11 +01:00
platform module_param: make bool parameters really bool (drivers & misc) 2012-01-13 09:32:20 +10:30
pnp
power module_param: make bool parameters really bool (drivers & misc) 2012-01-13 09:32:20 +10:30
pps
ps3
ptp
rapidio
regulator This fixes an integration issue with the regulator device tree bindings 2012-01-30 10:16:25 -08:00
rtc Revert "RTC: sa1100: remove redundant code of setting alarm" 2012-01-19 17:26:26 +00:00
s390 [S390] dasd: revalidate server for new pathgroup 2012-01-18 18:03:42 +01:00
sbus
scsi [SCSI] pm8001: Fix possible racing condition. 2012-02-29 16:52:59 -06:00
sfi
sh SH/R-Mobile updates for 3.3 merge window. 2012-01-11 23:29:20 -08:00
sn
spi spi-topcliff-pch: rename pch_spi_pcidev to pch_spi_pcidev_driver 2012-02-05 23:24:17 -07:00
ssb ssb: fix cardbus slot in hostmode 2012-02-01 15:26:00 -05:00
staging staging: pohmelfs: remove drivers/staging/pohmelfs 2012-02-08 16:19:06 -08:00
target target: Fix unsupported WRITE_SAME sense payload 2012-02-07 06:48:58 +00:00
tc
telephony
thermal thermal: Rename generate_netlink_event 2012-01-23 03:15:25 -05:00
tty tty: serial: omap-serial: wakeup latency constraint is in microseconds, not milliseconds 2012-02-09 10:48:36 -08:00
uio Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci 2012-01-11 18:50:26 -08:00
usb USB: usbserial: add new PID number (0xa951) to the ftdi driver 2012-02-03 11:22:44 -08:00
uwb Merge branch 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb 2012-01-09 12:09:47 -08:00
vhost vhost-net: add module alias (v2.1) 2012-01-13 10:12:23 -08:00
video fbdev fixes for 3.3 2012-02-07 15:54:02 -08:00
virt
virtio virtio: correct the memory barrier in virtqueue_kick_prepare() 2012-01-28 08:10:23 +10:30
vlynq
w1
watchdog watchdog: iTCO_wdt: add Intel Lynx Point DeviceIDs 2012-01-27 10:01:16 +01:00
xen xen/granttable: Disable grant v2 for HVM domains. 2012-01-27 11:14:16 -05:00
zorro
Kconfig
Makefile mmc: sdhci-pci: add platform data 2012-01-11 23:58:47 -05:00