linux/drivers/acpi
Rafael J. Wysocki 1ba51a7c14 ACPI / PCI / PM: Rework acpi_pci_propagate_wakeup()
The acpi_pci_propagate_wakeup() routine is there to handle cases in
which PCI bridges (or PCIe ports) are expected to signal wakeup
for devices below them, but currently it doesn't do that correctly.

The problem is that acpi_pci_propagate_wakeup() uses
acpi_pm_set_device_wakeup() for bridges and if that routine is
called for multiple times to disable wakeup for the same device,
it will disable it on the first invocation and the next calls
will have no effect (it works analogously when called to enable
wakeup, but that is not a problem).

Now, say acpi_pci_propagate_wakeup() has been called for two
different devices under the same bridge and it has called
acpi_pm_set_device_wakeup() for that bridge each time.  The
bridge is now enabled to generate wakeup signals.  Next,
suppose that one of the devices below it resumes and
acpi_pci_propagate_wakeup() is called to disable wakeup for that
device.  It will then call acpi_pm_set_device_wakeup() for the bridge
and that will effectively disable remote wakeup for all devices under
it even though some of them may still be suspended and remote wakeup
may be expected to work for them.

To address this (arguably theoretical) issue, allow
wakeup.enable_count under struct acpi_device to grow beyond 1 in
certain situations.  In particular, allow that to happen in
acpi_pci_propagate_wakeup() when wakeup is enabled or disabled
for PCI bridges, so that wakeup is actually disabled for the
bridge when all devices under it resume and not when just one
of them does that.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
2017-08-01 14:05:03 +02:00
..
acpica Merge branches 'acpi-pmic', 'acpi-misc' and 'acpi-tables' 2017-07-03 14:25:11 +02:00
apei arm64 updates for 4.13: 2017-07-05 17:09:27 -07:00
arm64 IOMMU Updates for Linux v4.13 2017-07-12 10:00:04 -07:00
dptf ACPI / DPTF: constify attribute_group structures 2017-07-04 22:15:28 +02:00
nfit acpi/nfit: Fix memory corruption/Unregister mce decoder on failure 2017-07-17 11:43:58 -07:00
pmic ACPI / PMIC: xpower: Add support for the GPI1 regulator to the OpRegion handler 2017-06-22 02:15:05 +02:00
x86 ACPI / x86: Add KIOX000A accelerometer on GPD win to always_present_ids array 2017-07-12 13:26:13 +02:00
ac.c ACPI / AC: Add a blacklist with PMIC ACPI HIDs with a native charger driver 2017-04-19 22:53:35 +02:00
acpi_amba.c
acpi_apd.c More ACPI updates for v4.12-rc1 2017-05-10 09:35:42 -07:00
acpi_cmos_rtc.c
acpi_configfs.c ACPI: configfs: Unload SSDT on configfs entry removal 2017-06-22 02:43:12 +02:00
acpi_dbg.c ACPI: fix whitespace in pr_fmt() to align log entries 2017-06-22 02:18:20 +02:00
acpi_extlog.c ACPI: Switch to use generic guid_t in acpi_evaluate_dsm() 2017-06-07 12:20:49 +02:00
acpi_ipmi.c ACPI / IPMI: change warning to debug on timeout 2017-04-07 12:25:37 -05:00
acpi_lpat.c
acpi_lpss.c ACPI / LPSS: constify attribute_group structures 2017-07-04 22:15:24 +02:00
acpi_memhotplug.c
acpi_pad.c sched/headers: Prepare for new header dependencies before moving code to <uapi/linux/sched/types.h> 2017-03-02 08:42:27 +01:00
acpi_platform.c ACPI / platform: Update platform device NUMA node based on _PXM method 2017-04-18 16:56:39 +02:00
acpi_pnp.c
acpi_processor.c ACPI / Processor: Drop setup_max_cpus check from acpi_processor_add() 2017-04-18 16:50:24 +02:00
acpi_video.c ACPI / video: add comments about subtle cases 2017-04-19 22:50:11 +02:00
acpi_watchdog.c ACPI / watchdog: Print out error number when device creation fails 2016-12-26 23:21:56 +01:00
battery.c ACPI / PM: Ignore spurious SCI wakeups from suspend-to-idle 2017-06-15 00:55:44 +02:00
battery.h
bgrt.c ACPI: BGRT: constify attribute_group structures 2017-07-04 22:15:20 +02:00
blacklist.c ACPI / blacklist: add _REV quirk for Dell Inspiron 7537 2017-04-19 02:35:54 +02:00
bus.c Merge branches 'acpi-spcr', 'acpi-osi', 'acpi-bus', 'acpi-scan' and 'acpi-misc' 2017-07-10 22:46:21 +02:00
button.c ACPI updates for v4.13-rc1 2017-07-04 14:16:49 -07:00
cm_sbs.c
container.c
cppc_acpi.c scripts/spelling.txt: add regsiter -> register spelling mistake 2017-05-08 17:15:13 -07:00
custom_method.c
debugfs.c
device_pm.c ACPI / PCI / PM: Rework acpi_pci_propagate_wakeup() 2017-08-01 14:05:03 +02:00
device_sysfs.c ACPI / property: Hierarchical properties support update 2016-11-24 02:43:47 +01:00
dock.c
ec_sys.c
ec.c ACPI / PM / EC: Flush all EC work in acpi_freeze_sync() 2017-07-20 16:44:24 +02:00
event.c genetlink: mark families as __ro_after_init 2016-10-27 16:16:09 -04:00
evged.c
fan.c ACPI / fan: Fix error reading cur_state 2016-10-10 02:20:43 +02:00
glue.c IOMMU Updates for Linux v4.12 2017-05-09 15:15:47 -07:00
hed.c
internal.h ACPI / PM / EC: Flush all EC work in acpi_freeze_sync() 2017-07-20 16:44:24 +02:00
ioapic.c ACPI: fix whitespace in pr_fmt() to align log entries 2017-06-22 02:18:20 +02:00
irq.c ACPI / irq: Fix return code of acpi_gsi_to_irq() 2017-07-12 13:11:49 +02:00
Kconfig - New Drivers 2017-05-03 12:16:25 -07:00
Makefile Merge branches 'acpi-soc', 'acpi-bus', 'acpi-pmic' and 'acpi-power' 2017-05-09 23:23:02 +02:00
numa.c ACPI: NUMA: Fix typo in the full name of SRAT 2017-07-24 22:27:44 +02:00
nvs.c
osi.c ACPI / osi: Make local function acpi_osi_dmi_linux() static 2017-07-04 21:35:19 +02:00
osl.c ACPICA: Hardware: Add sleep register hooks 2017-01-02 23:18:41 +01:00
pci_irq.c
pci_link.c ACPI/PCI: pci_link: Include PIRQ_PENALTY_PCI_USING for ISA IRQs 2016-10-24 14:18:14 +02:00
pci_mcfg.c PCI/ACPI: Add ThunderX pass2.x 2nd node MCFG quirk 2017-04-24 11:58:56 -05:00
pci_root.c Power management updates for v4.13-rc1 2017-07-04 13:39:41 -07:00
pci_slot.c
power.c ACPI / power: constify attribute_group structures 2017-07-04 22:15:14 +02:00
proc.c ACPI / PM: Drop run_wake from struct acpi_device_wakeup_flags 2017-06-28 01:52:15 +02:00
processor_core.c Revert"x86/acpi: Enable MADT APIs to return disabled apicids" 2017-03-11 14:41:18 +01:00
processor_driver.c ACPI/processor: Use cpu_hotplug_disable() instead of get_online_cpus() 2017-05-26 10:10:44 +02:00
processor_idle.c x86/amd: Simplify AMD E400 aware idle routine 2016-12-09 21:23:21 +01:00
processor_pdc.c
processor_perflib.c ACPI: processor_perflib: Simplify code and stop using CPUFREQ_START 2017-02-04 00:05:29 +01:00
processor_thermal.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
processor_throttling.c acpi/processor: Prevent cpu hotplug deadlock 2017-05-26 10:10:47 +02:00
property.c device property: Introduce fwnode_device_is_available() 2017-06-22 02:55:34 +02:00
reboot.c
resource.c scripts/spelling.txt: add "overrided" pattern and fix typo instances 2017-02-27 18:43:47 -08:00
sbs.c
sbshc.c
sbshc.h
scan.c Device properties framework updates for v4.13-rc1 2017-07-10 15:23:45 -07:00
sleep.c ACPI / PM / EC: Flush all EC work in acpi_freeze_sync() 2017-07-20 16:44:24 +02:00
sleep.h ACPI / power: Delay turning off unused power resources after suspend 2017-05-01 23:11:21 +02:00
spcr.c ACPI: SPCR: Workaround for APM X-Gene 8250 UART 32-alignment errata 2017-07-04 21:29:38 +02:00
sysfs.c Merge branches 'acpi-button', 'acpica' and 'acpi-sysfs' 2017-06-03 00:03:29 +02:00
tables.c Merge branch 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-05-01 20:51:12 -07:00
thermal.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
utils.c ACPI: Switch to use generic guid_t in acpi_evaluate_dsm() 2017-06-07 12:20:49 +02:00
video_detect.c ACPI / video: Add quirks for the Dell Precision 7510 2017-06-28 23:41:03 +02:00
wakeup.c