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linux/drivers/acpi
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Rafael J. Wysocki a15a3d92ec ACPI / scan: Prefer devices without _HID/_CID for _ADR matching 
[ Upstream commit c2a6bbaf0c ]

The way acpi_find_child_device() works currently is that, if there
are two (or more) devices with the same _ADR value in the same
namespace scope (which is not specifically allowed by the spec and
the OS behavior in that case is not defined), the first one of them
found to be present (with the help of _STA) will be returned.

This covers the majority of cases, but is not sufficient if some of
the devices in question have a _HID (or _CID) returning some valid
ACPI/PNP device IDs (which is disallowed by the spec) and the
ASL writers' expectation appears to be that the OS will match
devices without a valid ACPI/PNP device ID against a given bus
address first.

To cover this special case as well, modify find_child_checks()
to prefer devices without ACPI/PNP device IDs over devices that
have them.

Suggested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2017-08-06 18:59:47 -07:00
..
acpica Revert "ACPICA: FADT support cleanup" 2016-11-14 20:56:17 +01:00
apei ACPI / APEI: Fix NMI notification handling 2017-01-19 20:18:07 +01:00
arm64 ACPI: Add new IORT functions to support MSI domain handling 2016-09-12 20:32:40 +01:00
dptf ACPI / platform: Add support for build-in properties 2016-11-10 00:30:29 +01:00
nfit acpi/nfit: Fix memory corruption/Unregister mce decoder on failure 2017-07-27 15:08:07 -07:00
pmic ACPI / PMIC: remove modular references from non-modular code 2016-07-16 03:03:14 +02:00
ac.c ACPI: Remove FSF mailing addresses 2015-07-08 02:27:32 +02:00
acpi_amba.c ACPI / amba: Remove CLK_IS_ROOT 2016-04-27 23:42:57 +02:00
acpi_apd.c Merge branch 'device-properties' 2016-11-11 23:23:02 +01:00
acpi_cmos_rtc.c char/genrtc: x86: remove remnants of asm/rtc.h 2016-06-04 00:20:07 +02:00
acpi_configfs.c ACPI: Rename configfs.c to acpi_configfs.c to prevent link error 2016-07-11 15:13:36 +02:00
acpi_dbg.c ACPI / debugger: Fix regression introduced by IS_ERR_VALUE() removal 2016-07-05 23:02:34 +02:00
acpi_extlog.c ACPI and power management updates for 3.17-rc1 2014-08-06 20:34:19 -07:00
acpi_ipmi.c ACPI: Remove FSF mailing addresses 2015-07-08 02:27:32 +02:00
acpi_lpat.c ACPI / lpat: make it explicitly non-modular 2016-07-16 03:08:10 +02:00
acpi_lpss.c ACPI / platform: Add support for build-in properties 2016-11-10 00:30:29 +01:00
acpi_memhotplug.c ACPI: Remove FSF mailing addresses 2015-07-08 02:27:32 +02:00
acpi_pad.c ACPI / PAD: don't register acpi_pad driver if running as Xen dom0 2016-10-12 21:44:04 +02:00
acpi_platform.c ACPI: Do not create a platform_device for IOAPIC/IOxAPIC 2017-04-08 09:30:34 +02:00
acpi_pnp.c ACPI / PNP: constify device IDs 2016-01-04 22:10:30 +01:00
acpi_processor.c acpi: Validate processor id when mapping the processor 2016-09-21 21:18:40 +02:00
acpi_video.c ACPI / video: skip evaluating _DOD when it does not exist 2016-06-22 02:00:04 +02:00
acpi_watchdog.c ACPI / watchdog: Add support for WDAT hardware watchdog 2016-09-24 02:10:04 +02:00
battery.c ACPI / battery: Add sysfs representation after checking _BST 2016-08-31 00:35:16 +02:00
battery.h ACPI / battery: move some ACPI_BATTERY_* definitions to header 2014-03-19 01:57:46 +01:00
bgrt.c drivers/acpi: make bgrt driver explicitly non-modular 2016-03-09 23:46:07 +01:00
blacklist.c ACPI / blacklist: Make Dell Latitude 3350 ethernet work 2017-03-22 12:43:38 +01:00
bus.c Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-10-03 19:10:15 -07:00
button.c Revert "ACPI / button: Change default behavior to lid_init_state=open" 2017-06-07 12:07:47 +02:00
cm_sbs.c ACPI: Remove FSF mailing addresses 2015-07-08 02:27:32 +02:00
container.c ACPI: Remove FSF mailing addresses 2015-07-08 02:27:32 +02:00
cppc_acpi.c ACPI / CPPC: set an error code on probe error path 2017-01-19 20:18:07 +01:00
custom_method.c ACPI: Clean up inclusions of ACPI header files 2013-12-07 01:03:14 +01:00
debugfs.c ACPI: fix acpi_debugfs_init prototype 2015-08-07 02:55:18 +02:00
device_pm.c ACPI / PM: Export acpi_device_fix_up_power() 2016-05-20 15:54:01 +02:00
device_sysfs.c ACPI / device_sysfs: Clean up checkpatch errors 2016-05-04 23:47:32 +02:00
dock.c ACPI / dock: make dock explicitly non-modular 2016-07-16 03:08:08 +02:00
ec.c Revert "ACPI / EC: Enable event freeze mode..." to fix a regression 2017-07-27 15:08:04 -07:00
ec_sys.c ACPI / EC: Deny write access unless requested by module param 2016-03-09 23:26:15 +01:00
event.c netlink: make nlmsg_end() and genlmsg_end() void 2015-01-18 01:03:45 -05:00
evged.c ACPI / GED: make evged.c explicitly non-modular 2016-05-09 22:59:25 +02:00
fan.c ACPI / fan: Fix error reading cur_state 2016-10-10 02:20:43 +02:00
glue.c ACPI / scan: Prefer devices without _HID/_CID for _ADR matching 2017-08-06 18:59:47 -07:00
gsi.c ACPI: Rename acpi_gsi_get_irq_type to acpi_dev_get_irq_type and export symbol 2016-01-01 03:20:25 +01:00
hed.c ACPI: Remove FSF mailing addresses 2015-07-08 02:27:32 +02:00
internal.h ACPI / EC: Use busy polling mode when GPE is not enabled 2017-04-21 09:31:24 +02:00
ioapic.c x86/ioapic: Fix IOAPIC failing to request resource 2016-08-18 11:45:19 +02:00
Kconfig TTY/Serial patches for 4.9-rc1 2016-10-03 20:11:49 -07:00
Makefile ACPI: Fix incompatibility with mcount-based function graph tracing 2017-04-08 09:30:34 +02:00
numa.c ACPI / NUMA: Enable ACPI based NUMA on ARM64 2016-06-22 01:36:59 +02:00
nvs.c ACPI: Clean up acpi_os_map/unmap_memory() to eliminate __iomem. 2014-05-27 18:13:08 +02:00
osi.c ACPI / osi: Collect _OSI handling into one single file 2016-05-05 00:13:53 +02:00
osl.c acpi_os_vprintf: Use printk_get_level() to avoid unnecessary KERN_CONT 2016-10-12 21:46:37 +02:00
pci_irq.c ACPI / PCI: fix GIC irq model default PCI IRQ polarity 2016-09-10 02:50:50 +02:00
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 generic MCFG table handling 2016-06-10 18:27:59 -05:00
pci_root.c x86/ioapic: Support hot-removal of IOAPICs present during boot 2016-08-18 11:45:18 +02:00
pci_slot.c ACPI / PCI: make pci_slot explicitly non-modular 2016-07-16 03:05:29 +02:00
power.c ACPI / power: Avoid maybe-uninitialized warning 2017-04-27 09:10:38 +02:00
proc.c ACPI: change acpi_sleep_proc_init() to return void 2015-09-15 03:03:15 +02:00
processor_core.c acpi: Fix broken error check in map_processor() 2016-09-23 18:04:56 +02:00
processor_driver.c Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-10-03 19:43:08 -07:00
processor_idle.c nmi_backtrace: generate one-line reports for idle cpus 2016-10-07 18:46:30 -07:00
processor_pdc.c ACPI / processor: Introduce invalid_logical_cpuid() 2015-05-13 23:28:14 +02:00
processor_perflib.c Merge branch 'pm-cpufreq' 2015-09-01 15:52:35 +02:00
processor_thermal.c ACPI: Remove FSF mailing addresses 2015-07-08 02:27:32 +02:00
processor_throttling.c ACPI/processor: Convert to hotplug state machine 2016-09-19 21:44:29 +02:00
property.c ACPI / property: Allow holes in reference properties 2016-10-11 22:44:00 +02:00
reboot.c Revert "ACPI: ignore FADT reset-reg-sup flag" 2012-04-20 11:19:35 -07:00
resource.c PCI: ACPI: IA64: fix IO port generic range check 2016-03-22 23:07:49 +01:00
sbs.c ACPI / SBS: fix inconsistent indenting inside if statement 2016-01-04 22:14:27 +01:00
sbshc.c Revert "ACPI / SBS: Add 5 us delay to fix SBS hangs on MacBook" 2015-11-16 23:26:45 +01:00
sbshc.h ACPI: SBS: Ignore alarms coming from unknown devices 2007-12-14 15:14:06 -05:00
scan.c ACPI / scan: Set the visited flag for all enumerated devices 2017-04-21 09:31:20 +02:00
sleep.c ACPI: save NVS memory for Lenovo G50-45 2017-04-12 12:41:21 +02:00
sleep.h ACPICA: Drop Linux-specific waking vector functions 2016-01-04 22:05:20 +01:00
spcr.c ACPI: parse SPCR and enable matching console 2016-09-28 17:46:46 +02:00
sysfs.c ACPI / sysfs: Provide quirk mechanism to prevent GPE flooding 2017-04-12 12:41:18 +02:00
tables.c ACPI / tables: Remove duplicated include from tables.c 2016-09-17 01:03:32 +02:00
thermal.c thermal: Enhance thermal_zone_device_update for events 2016-09-27 14:35:21 +08:00
utils.c nfit: make DIMM DSMs optional 2016-07-19 12:32:39 -07:00
video_detect.c ACPI / video: Add force_native quirk for HP Pavilion dv6 2017-01-09 08:32:18 +01:00
wakeup.c ACPI: Clean up inclusions of ACPI header files 2013-12-07 01:03:14 +01:00