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Rafael J. Wysocki 41863fcee3 ACPI / power: Drop automaitc resume of power resource dependent devices 
The mechanism causing devices depending on a given power resource
(that is, devices that can be in D0 only if that power resource is
on) to be resumed automatically when the power resource is turned
on (and their "inferred" power state becomes D0 as a result) is
inherently racy and in fact unnecessary.

It is racy, because if the power resource is turned on and then
immediately off, the device resume triggered by the first transition
to "on" may still happen, causing the power resource to be turned
on again.  That again will trigger the "resume of dependent devices"
mechanism, but if the devices in question are not in use, they will
be suspended in the meantime causing the power resource to be turned
off.  However, the "resume of dependent devices" will next resume
them again and so on.  In some cases (USB port PM in particular) that
leads to an endless busy loop of flipping the resource on and off
continuously.

It is needless, because whoever turns a power resource on will most
likely turn it off at some point and the devices that go into "D0"
as a result of turning it on will then go back into D3cold
(generally, the state they were in before).

Moreover, turning on all power resources a device needs to go into
D0 is not sufficient for a full transition into D0 in general.
Namely, _PS0 may need to be executed in addition to that in some
cases.  This means that the whole rationale of the "resume of
dependent devices" mechanism was incorrect to begin with and it's
best to remove it entirely.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 		2013-10-16 23:05:42 +02:00
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accessibility
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acpi ACPI / power: Drop automaitc resume of power resource dependent devices 2013-10-16 23:05:42 +02:00
amba
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ata update contact information for Mikael Pettersson 2013-09-25 13:27:42 -07:00
atm atm: nicstar: fix regression made by previous patch 2013-09-15 22:18:55 -04:00
auxdisplay
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base driver core : Fix use after free of dev->parent in device_shutdown 2013-09-26 14:46:11 -07:00
bcma bcma: make bcma_core_pci_{up,down}() callable from atomic context 2013-09-26 14:02:33 -04:00
block cciss: fix info leak in cciss_ioctl32_passthru() 2013-09-24 17:00:26 -07:00
bluetooth Bluetooth: btusb: Add support for Belkin F8065bf 2013-09-23 17:44:25 -03:00
bus bus: mvebu-mbus: Fix optional pcie-mem/io-aperture properties 2013-10-01 17:04:17 +00:00
cdrom
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char These patches are designed to enable improvements to /dev/random for 2013-10-10 12:31:43 -07:00
clk The common clk framework changes for 3.12 are dominated by clock driver 2013-09-09 15:49:04 -07:00
clocksource clocksource: em_sti: Set cpu_possible_mask to fix SMP broadcast 2013-09-26 02:31:04 +02:00
connector
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cpufreq intel_pstate: fix no_turbo 2013-10-01 22:51:11 +02:00
cpuidle ACPI and power management fixes for 3.12-rc1 2013-09-12 11:22:45 -07:00
crypto Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux 2013-09-07 12:53:35 +10:00
dca
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devfreq
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dio
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dma dma: edma.c: remove edma_desc leakage 2013-10-11 07:31:47 +05:30
edac Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile 2013-09-06 11:14:33 -07:00
eisa
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extcon Driver core patches for 3.12-rc1 2013-09-03 11:37:15 -07:00
firewire firewire: ohci: Fix deadlock at bus reset 2013-08-29 22:35:05 +02:00
firmware firmware/dmi_scan: drop OOM messages 2013-09-11 15:58:51 -07:00
fmc
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gpio Fixes for the GPIO tree for v3.12: 2013-10-05 12:11:40 -07:00
gpu Revert "i915: Update VGA arbiter support for newer devices" 2013-10-11 15:19:22 +10:00
hid HID: wiimote: fix FF deadlock 2013-10-07 17:08:26 +02:00
hsi
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hv Drivers: hv: vmbus: Terminate vmbus version negotiation on timeout 2013-09-26 14:20:22 -07:00
hwmon hwmon: (applesmc) Always read until end of data 2013-10-09 09:48:55 -07:00
hwspinlock
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i2c i2c: i2c-mux-pinctrl: use deferred probe when adapter not found 2013-10-10 10:22:35 +02:00
ide ide: sgiioc4: Staticize ioc4_ide_attach_one() 2013-09-05 15:21:30 -04:00
idle
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iio iio:magnetometer: Bugfix magnetometer default output registers 2013-09-30 21:46:11 +01:00
infiniband ib_srpt: always set response for task management 2013-10-03 04:23:17 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2013-09-15 07:13:39 -04:00
iommu x86, build, pci: Fix PCI_MSI build on !SMP 2013-10-04 10:43:34 -07:00
ipack
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irqchip ARM: SoC late changes for v3.12 2013-09-09 16:35:29 -07:00
isdn isdn: hfcpci_softirq: get func return to suppress compiler warning 2013-09-15 22:27:04 -04:00
leds Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2013-09-12 11:35:33 -07:00
lguest lguest: fix guest kernel stack overflow when TF bit set. 2013-09-06 08:09:27 +09:30
macintosh
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mailbox mailbox: remove unnecessary platform_set_drvdata() 2013-09-18 12:02:00 -07:00
md bcache: Fix a null ptr deref regression 2013-10-10 18:17:39 -07:00
media Remove GENERIC_HARDIRQ config option 2013-09-13 15:09:52 +02:00
memory ARM: SoC platform changes for 3.12 2013-09-06 13:30:06 -07:00
memstick memstick: add support for legacy memorysticks 2013-09-11 15:59:35 -07:00
message
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mfd Remove GENERIC_HARDIRQ config option 2013-09-13 15:09:52 +02:00
misc mei: cancel stall timers in mei_reset 2013-09-26 13:56:53 -07:00
mmc ARM: shmobile: update SDHI DT compatibility string to the <unit>-<soc> format 2013-09-21 09:55:32 -07:00
mtd mtd: m25p80: Fix 4 byte addressing mode for Micron devices. 2013-09-27 05:56:22 -05:00
net qlcnic: Fix SR-IOV configuration 2013-10-01 12:34:59 -04:00
nfc
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ntb ntb: clean up unnecessary MSI/MSI-X capability find 2013-09-05 11:08:01 -07:00
nubus
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of Merge branch 'for-v3.12-fix' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping 2013-09-11 19:11:59 -07:00
oprofile oprofile: get rid of pointless forward declarations of struct super_block 2013-09-03 22:52:48 -04:00
parisc PCI changes for the v3.12 merge window: 2013-09-03 16:24:35 -07:00
parport drivers: parport: Kconfig: exclude h8300 for PARPORT_PC 2013-08-30 12:08:04 -07:00
pci ACPI / hotplug / PCI: Drop WARN_ON() from acpiphp_enumerate_slots() 2013-10-12 01:49:48 +02:00
pcmcia
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pinctrl pinctrl: palmas: do not abort pin configuration for BIAS_DEFAULT 2013-09-27 16:22:43 +02:00
platform Merge branch 'for_linus' of git://cavan.codon.org.uk/platform-drivers-x86 2013-09-15 17:42:59 -04:00
pnp pnp: change pnp bus pm_ops to invoke pnp driver dev_pm_ops if specified 2013-09-11 15:58:15 -07:00
power Remove GENERIC_HARDIRQ config option 2013-09-13 15:09:52 +02:00
pps Remove GENERIC_HARDIRQ config option 2013-09-13 15:09:52 +02:00
ps3
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ptp
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pwm ARM: SoC cleanups for 3.12 2013-09-06 13:21:16 -07:00
rapidio
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regulator Merge remote-tracking branch 'regulator/fix/wm8350' into regulator-linus 2013-09-30 12:04:33 +01:00
remoteproc
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reset
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rpmsg
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rtc rtc: simplify devm_request_mem_region/devm_ioremap 2013-09-11 15:58:59 -07:00
s390 s390/sclp: properly detect line mode console 2013-09-30 13:04:39 +02:00
sbus
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scsi Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2013-09-19 13:57:28 -05:00
sfi
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sh
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sn
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spi Merge remote-tracking branch 'spi/fix/s3c64xx' into spi-linus 2013-10-07 14:51:59 +01:00
ssb
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staging staging: comedi: ni_65xx: (bug fix) confine insn_bits to one subdevice 2013-10-03 14:27:32 -07:00
target iscsi-target; Allow an extra tag_num / 2 number of percpu_ida tags 2013-10-03 14:22:45 -07:00
tc
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thermal drivers: thermal: add check when unregistering cpu cooling 2013-09-03 09:10:34 -04:00
tty xen/hvc: allow xenboot console to be used again 2013-10-03 16:12:58 -07:00
uio Driver core patches for 3.12-rc1 2013-09-03 11:37:15 -07:00
usb usb: chipidea: add Intel Clovertrail pci id 2013-10-03 15:41:54 -07:00
uwb
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vfio vfio-pci: PCI hot reset interface 2013-09-04 11:28:04 -06:00
vhost vhost/scsi: Use GFP_ATOMIC with percpu_ida_alloc for obtaining tag 2013-10-01 21:27:31 -07:00
video video: mxsfb: Add missing break 2013-09-26 15:33:23 +03:00
virt
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virtio virtio_pci: pm: Use CONFIG_PM_SLEEP instead of CONFIG_PM 2013-09-09 10:02:53 +09:30
vlynq
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vme
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w1 Remove GENERIC_HARDIRQ config option 2013-09-13 15:09:52 +02:00
watchdog watchdog: sunxi: Fix section mismatch 2013-10-13 20:02:03 +02:00
xen Bug-fixes: 2013-09-25 15:50:53 -07:00
zorro
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Kconfig
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Makefile
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