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linux/drivers
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Rafael J. Wysocki 32bdfac546 PM: Do not hold dpm_list_mtx while disabling/enabling nonboot CPUs 
We shouldn't hold dpm_list_mtx while executing
[disable|enable]_nonboot_cpus(), because theoretically this may lead
to a deadlock as shown by the following example (provided by Johannes
Berg):

CPU 3       CPU 2                     CPU 1
                                      suspend/hibernate
            something:
            rtnl_lock()               device_pm_lock()
                                       -> mutex_lock(&dpm_list_mtx)

            mutex_lock(&dpm_list_mtx)

linkwatch_work
 -> rtnl_lock()
                                      disable_nonboot_cpus()
                                       -> flush CPU 3 workqueue

Fortunately, device drivers are supposed to stop any activities that
might lead to the registration of new device objects way before
disable_nonboot_cpus() is called, so it shouldn't be necessary to
hold dpm_list_mtx over the entire late part of device suspend and
early part of device resume.

Thus, during the late suspend and the early resume of devices acquire
dpm_list_mtx only when dpm_list is going to be traversed and release
it right after that.

This patch is reported to fix the regressions tracked as
http://bugzilla.kernel.org/show_bug.cgi?id=13245.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Reported-by: Miles Lane <miles.lane@gmail.com>
Tested-by: Ming Lei <tom.leiming@gmail.com>
2009-05-24 21:15:07 +02:00
..
accessibility
acpi Merge branches 'release', 'bugzilla-13032', 'bugzilla-13041+', 'bugzilla-13121', 'bugzilla-13165', 'bugzilla-13243', 'bugzilla-13259', 'resume-sci-en-regression', 'thermal-regression', 'tsc-regression' and 'asus-2.6.30' into release 2009-05-16 01:55:59 -04:00
amba
ata libata: Media rotation rate and form factor heuristics 2009-05-15 14:14:56 -04:00
atm Replace all DMA_nBIT_MASK macro with DMA_BIT_MASK(n) 2009-04-13 15:04:33 -07:00
auxdisplay
base PM: Do not hold dpm_list_mtx while disabling/enabling nonboot CPUs 2009-05-24 21:15:07 +02:00
block xen/blkfront: fix warning when deleting gendisk on unplug/shutdown 2009-05-19 08:27:42 +02:00
bluetooth
cdrom cdrom: beyond ARRAY_SIZE of viocd_diskinfo 2009-05-20 08:42:06 +02:00
char ipmi: fix ipmi_si modprobe hang 2009-05-22 07:30:41 -07:00
clocksource clocksource: pass clocksource to read() callback 2009-04-21 13:41:47 -07:00
connector
cpufreq
cpuidle
crypto Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2009-05-17 15:48:05 -07:00
dca
dio
dma dma: fix ipu_idmac.c to not discard the last queued buffer 2009-05-12 14:41:48 -07:00
edac edac: ppc mpc85xx fix mc err detect 2009-04-21 13:41:51 -07:00
eisa
firewire
firmware ibft: fix the display of a few fields in the NIC attribute structure in sysfs 2009-05-02 15:36:10 -07:00
gpio Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2009-04-03 15:24:35 -07:00
gpu drm: Copy back ioctl data to userspace regardless of return code. 2009-05-20 11:41:41 -07:00
hid HID: add NOGET quirk for devices from CH Products 2009-05-11 17:09:21 +02:00
hwmon hwmon: (w83781d) Fix W83782D support (NULL pointer dereference) 2009-05-08 20:27:28 +02:00
i2c Merge branch 'i2c-for-2630-rc5' of git://aeryn.fluff.org.uk/bjdooks/linux 2009-05-12 11:21:51 -07:00
ide via82cxxx: Add VIA VX855 PCI Device ID 2009-05-22 16:23:39 +02:00
idle dma-mapping: replace all DMA_64BIT_MASK macro with DMA_BIT_MASK(64) 2009-04-07 08:31:10 -07:00
ieee1394 dma-mapping: replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32) 2009-04-07 08:31:11 -07:00
infiniband Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband 2009-05-13 16:31:12 -07:00
input [ARM] 5519/1: amba probe: pass "struct amba_id *" instead of void * 2009-05-20 23:26:51 +01:00
isdn Fix the race between capifs remount and node creation 2009-05-09 10:51:34 -04:00
leds leds: just ignore invalid GPIOs in leds-gpio 2009-04-08 14:13:48 +01:00
lguest lguest: fix guest crash on non-linear addresses in gdt pvops 2009-04-19 23:14:01 +09:30
macintosh Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6 2009-04-24 08:16:05 -07:00
mca
md md: remove rd%d links immediately after stopping an array. 2009-05-07 12:51:06 +10:00
media V4L/DVB (11680): cafe_ccic: use = instead of == for setting a value at a var 2009-05-09 18:54:32 -03:00
memstick dma-mapping: replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32) 2009-04-07 08:31:11 -07:00
message scsi: mpt: suppress debugobjects warning 2009-04-21 13:41:50 -07:00
mfd mfd: pcf50633: fix unsafe disable_irq() 2009-05-19 22:22:28 +02:00
misc [SCSI] ses: fix problems caused by empty SES provided name 2009-05-15 12:20:57 -04:00
mmc [ARM] 5519/1: amba probe: pass "struct amba_id *" instead of void * 2009-05-20 23:26:51 +01:00
mtd mtd_dataflash: unbreak erase support 2009-05-18 08:36:21 -07:00
net be2net: add two new pci device ids to pci device table 2009-05-18 15:38:55 -07:00
nubus
of
oprofile Merge branch 'tracing-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-04-05 11:04:19 -07:00
parisc parport: Fix various uses of parport_pc 2009-04-14 08:48:50 -07:00
parport parport: Use the PCI IRQ if offered 2009-04-07 08:44:06 -07:00
pci PCI PM: Fix initialization and kexec breakage for some devices 2009-05-19 15:26:07 -07:00
pcmcia [ARM] 5458/1: pcmcia: pxa2xx-sharpsl: check if we do have Scoop config 2009-04-23 23:25:40 +01:00
platform eeepc-laptop: unregister_rfkill_notifier on failure 2009-05-14 11:28:27 -04:00
pnp ACPI: suspend: don't let device _PS3 failure prevent suspend 2009-05-08 00:22:29 -04:00
power Merge git://git.infradead.org/battery-2.6 2009-04-08 17:45:02 -07:00
ps3
rapidio dma-mapping: replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32) 2009-04-07 08:31:11 -07:00
regulator regulator: da903x: add missing __devexit_p() 2009-05-18 11:21:10 +01:00
rtc [ARM] 5519/1: amba probe: pass "struct amba_id *" instead of void * 2009-05-20 23:26:51 +01:00
s390 [SCSI] zfcp: Fix oops when port disappears 2009-04-27 10:07:37 -05:00
sbus sbus: changed ioctls to unlocked 2009-04-14 19:46:19 -07:00
scsi [SCSI] mpt2sas: fix driver version inconsistency 2009-05-18 14:17:17 -05:00
serial icom: fix rmmod crash 2009-05-22 21:47:52 -07:00
sh sh: intc: Added resume from hibernation support to the intc 2009-04-06 08:55:19 -07:00
sn dma-mapping: replace all DMA_64BIT_MASK macro with DMA_BIT_MASK(64) 2009-04-07 08:31:10 -07:00
spi pxa2xx_spi: prevent panic case setup() fails 2009-05-12 14:11:34 -07:00
ssb
staging Staging: comedi: David doesn't want to get comedi patches 2009-05-08 19:39:28 -07:00
tc
telephony
thermal thermal: fix off-by-1 error in trip point trigger condition 2009-05-14 13:40:53 -04:00
uio UIO: fix specific device driver missing statement for depmod 2009-04-16 16:17:11 -07:00
usb Fix oops on close of hot-unplugged FTDI serial converter 2009-05-18 08:37:15 -07:00
uwb dma-mapping: replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32) 2009-04-07 08:31:11 -07:00
video video: stop sh_mobile_lcdcfb only if started 2009-05-22 13:19:15 +09:00
virtio virtio: fix suspend when using virtio_balloon 2009-04-19 23:14:01 +09:30
w1 mfd: remove DS1WM clock handling 2009-04-05 00:32:22 +02:00
watchdog [ARM] 5460/1: Orion: reduce namespace pollution 2009-04-23 23:25:41 +01:00
xen [IA64] xen_domu_defconfig: fix build issues/warnings 2009-05-05 11:43:13 -07:00
zorro
Kconfig
Makefile V4L/DVB (11561a): move media after i2c 2009-04-29 15:41:13 -03:00