There is only one caller of acpi_bus_type_and_status() which is
acpi_bus_check_add(), so fold the former into the latter and use
the observation that the initial status of the device is
ACPI_STA_DEFAULT in all cases except for ACPI_BUS_TYPE_PROCESSOR
to simplify the code.
No intentional functional impact.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Commit 496121c021 ("ACPI: processor: idle: Allow probing on platforms
with one ACPI C-state") broke CPU0 hotplug on certain systems, e.g.
I'm observing the following on AWS Nitro (e.g r5b.xlarge but other
instance types are affected as well):
# echo 0 > /sys/devices/system/cpu/cpu0/online
# echo 1 > /sys/devices/system/cpu/cpu0/online
<10 seconds delay>
-bash: echo: write error: Input/output error
In fact, the above mentioned commit only revealed the problem and did
not introduce it. On x86, to wakeup CPU an NMI is being used and
hlt_play_dead()/mwait_play_dead() loops are prepared to handle it:
/*
* If NMI wants to wake up CPU0, start CPU0.
*/
if (wakeup_cpu0())
start_cpu0();
cpuidle_play_dead() -> acpi_idle_play_dead() (which is now being called on
systems where it wasn't called before the above mentioned commit) serves
the same purpose but it doesn't have a path for CPU0. What happens now on
wakeup is:
- NMI is sent to CPU0
- wakeup_cpu0_nmi() works as expected
- we get back to while (1) loop in acpi_idle_play_dead()
- safe_halt() puts CPU0 to sleep again.
The straightforward/minimal fix is add the special handling for CPU0 on x86
and that's what the patch is doing.
Fixes: 496121c021 ("ACPI: processor: idle: Allow probing on platforms with one ACPI C-state")
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: 5.10+ <stable@vger.kernel.org> # 5.10+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Commit 71da201f38 ("ACPI: scan: Defer enumeration of devices with
_DEP lists") dropped the following 2 lines from acpi_init_device_object():
/* Assume there are unmet deps until acpi_device_dep_initialize() runs */
device->dep_unmet = 1;
Leaving the initial value of dep_unmet at the 0 from the kzalloc(). This
causes the acpi_bus_get_status() call in acpi_add_single_object() to
actually call _STA, even though there maybe unmet deps, leading to errors
like these:
[ 0.123579] ACPI Error: No handler for Region [ECRM] (00000000ba9edc4c)
[GenericSerialBus] (20170831/evregion-166)
[ 0.123601] ACPI Error: Region GenericSerialBus (ID=9) has no handler
(20170831/exfldio-299)
[ 0.123618] ACPI Error: Method parse/execution failed
\_SB.I2C1.BAT1._STA, AE_NOT_EXIST (20170831/psparse-550)
Fix this by re-adding the dep_unmet = 1 initialization to
acpi_init_device_object() and modifying acpi_bus_check_add() to make sure
that dep_unmet always gets setup there, overriding the initial 1 value.
This re-fixes the issue initially fixed by
commit 63347db0af ("ACPI / scan: Use acpi_bus_get_status() to initialize
ACPI_TYPE_DEVICE devs"), which introduced the removed
"device->dep_unmet = 1;" statement.
This issue was noticed; and the fix tested on a Dell Venue 10 Pro 5055.
Fixes: 71da201f38 ("ACPI: scan: Defer enumeration of devices with _DEP lists")
Suggested-by: Rafael J. Wysocki <rafael@kernel.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Cc: 5.11+ <stable@vger.kernel.org> # 5.11+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
The following problem has been reported by George Kennedy:
Since commit 7fef431be9 ("mm/page_alloc: place pages to tail
in __free_pages_core()") the following use after free occurs
intermittently when ACPI tables are accessed.
BUG: KASAN: use-after-free in ibft_init+0x134/0xc49
Read of size 4 at addr ffff8880be453004 by task swapper/0/1
CPU: 3 PID: 1 Comm: swapper/0 Not tainted 5.12.0-rc1-7a7fd0d #1
Call Trace:
dump_stack+0xf6/0x158
print_address_description.constprop.9+0x41/0x60
kasan_report.cold.14+0x7b/0xd4
__asan_report_load_n_noabort+0xf/0x20
ibft_init+0x134/0xc49
do_one_initcall+0xc4/0x3e0
kernel_init_freeable+0x5af/0x66b
kernel_init+0x16/0x1d0
ret_from_fork+0x22/0x30
ACPI tables mapped via kmap() do not have their mapped pages
reserved and the pages can be "stolen" by the buddy allocator.
Apparently, on the affected system, the ACPI table in question is
not located in "reserved" memory, like ACPI NVS or ACPI Data, that
will not be used by the buddy allocator, so the memory occupied by
that table has to be explicitly reserved to prevent the buddy
allocator from using it.
In order to address this problem, rearrange the initialization of the
ACPI tables on x86 to locate the initial tables earlier and reserve
the memory occupied by them.
The other architectures using ACPI should not be affected by this
change.
Link: https://lore.kernel.org/linux-acpi/1614802160-29362-1-git-send-email-george.kennedy@oracle.com/
Reported-by: George Kennedy <george.kennedy@oracle.com>
Tested-by: George Kennedy <george.kennedy@oracle.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Mike Rapoport <rppt@linux.ibm.com>
Cc: 5.10+ <stable@vger.kernel.org> # 5.10+
The decrementation of acpi_device_bus_id->instance_no
in acpi_device_del() is incorrect, because it may cause
a duplicate instance number to be allocated next time
a device with the same acpi_device_bus_id is added.
Replace above mentioned approach by using IDA framework.
While at it, define the instance range to be [0, 4096).
Fixes: e49bd2dd5a ("ACPI: use PNPID:instance_no as bus_id of ACPI device")
Fixes: ca9dc8d42b ("ACPI / scan: Fix acpi_bus_id_list bookkeeping")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: 4.10+ <stable@vger.kernel.org> # 4.10+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
The .callback of the quirk for Sony VPCEH3U1E was unintetionally
removed by the commit 25417185e9 ("ACPI: video: Add DMI quirk
for GIGABYTE GB-BXBT-2807"). Add it back to make sure the quirk
for Sony VPCEH3U1E works as expected.
Fixes: 25417185e9 ("ACPI: video: Add DMI quirk for GIGABYTE GB-BXBT-2807")
Signed-off-by: Chris Chiu <chris.chiu@canonical.com>
Reported-by: Pavel Machek <pavel@ucw.cz>
Reviewed-by: Pavel Machek (CIP) <pavel@denx.de>
Cc: 5.11+ <stable@vger.kernel.org> # 5.11+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
- Rearrange Kconfig handling of ACPI_PLATFORM_PROFILE, add
"balanced-performance" to the list of supported platform profiles
and fix up some file references in a comment (Maximilian Luz).
- Add support for parsing the ACPI Firmware Performance Data Table
(FPDT) and exposing the data from there via sysfs (Zhang Rui).
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Merge tag 'acpi-5.12-rc1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more ACPI updates from Rafael Wysocki:
"These make additional changes to the platform profile interface merged
recently and add support for the FPDT ACPI table.
Specifics:
- Rearrange Kconfig handling of ACPI_PLATFORM_PROFILE, add
"balanced-performance" to the list of supported platform profiles
and fix up some file references in a comment (Maximilian Luz).
- Add support for parsing the ACPI Firmware Performance Data Table
(FPDT) and exposing the data from there via sysfs (Zhang Rui)"
* tag 'acpi-5.12-rc1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI: platform: Add balanced-performance platform profile
ACPI: platform: Fix file references in comment
ACPI: platform: Hide ACPI_PLATFORM_PROFILE option
ACPI: tables: introduce support for FPDT table
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Merge tag 'pci-v5.12-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull PCI updates from Bjorn Helgaas:
"Enumeration:
- Remove unnecessary locking around _OSC (Bjorn Helgaas)
- Clarify message about _OSC failure (Bjorn Helgaas)
- Remove notification of PCIe bandwidth changes (Bjorn Helgaas)
- Tidy checking of syscall user config accessors (Heiner Kallweit)
Resource management:
- Decline to resize resources if boot config must be preserved (Ard
Biesheuvel)
- Fix pci_register_io_range() memory leak (Geert Uytterhoeven)
Error handling (Keith Busch):
- Clear error status from the correct device
- Retain error recovery status so drivers can use it after reset
- Log the type of Port (Root or Switch Downstream) that we reset
- Always request a reset for Downstream Ports in frozen state
Endpoint framework and NTB (Kishon Vijay Abraham I):
- Make *_get_first_free_bar() take into account 64 bit BAR
- Add helper API to get the 'next' unreserved BAR
- Make *_free_bar() return error codes on failure
- Remove unused pci_epf_match_device()
- Add support to associate secondary EPC with EPF
- Add support in configfs to associate two EPCs with EPF
- Add pci_epc_ops to map MSI IRQ
- Add pci_epf_ops to expose function-specific attrs
- Allow user to create sub-directory of 'EPF Device' directory
- Implement ->msi_map_irq() ops for cadence
- Configure LM_EP_FUNC_CFG based on epc->function_num_map for cadence
- Add EP function driver to provide NTB functionality
- Add support for EPF PCI Non-Transparent Bridge
- Add specification for PCI NTB function device
- Add PCI endpoint NTB function user guide
- Add configfs binding documentation for pci-ntb endpoint function
Broadcom STB PCIe controller driver:
- Add support for BCM4908 and external PERST# signal controller
(Rafał Miłecki)
Cadence PCIe controller driver:
- Retrain Link to work around Gen2 training defect (Nadeem Athani)
- Fix merge botch in cdns_pcie_host_map_dma_ranges() (Krzysztof
Wilczyński)
Freescale Layerscape PCIe controller driver:
- Add LX2160A rev2 EP mode support (Hou Zhiqiang)
- Convert to builtin_platform_driver() (Michael Walle)
MediaTek PCIe controller driver:
- Fix OF node reference leak (Krzysztof Wilczyński)
Microchip PolarFlare PCIe controller driver:
- Add Microchip PolarFire PCIe controller driver (Daire McNamara)
Qualcomm PCIe controller driver:
- Use PHY_REFCLK_USE_PAD only for ipq8064 (Ansuel Smith)
- Add support for ddrss_sf_tbu clock for sm8250 (Dmitry Baryshkov)
Renesas R-Car PCIe controller driver:
- Drop PCIE_RCAR config option (Lad Prabhakar)
- Always allocate MSI addresses in 32bit space (Marek Vasut)
Rockchip PCIe controller driver:
- Add FriendlyARM NanoPi M4B DT binding (Chen-Yu Tsai)
- Make 'ep-gpios' DT property optional (Chen-Yu Tsai)
Synopsys DesignWare PCIe controller driver:
- Work around ECRC configuration hardware defect (Vidya Sagar)
- Drop support for config space in DT 'ranges' (Rob Herring)
- Change size to u64 for EP outbound iATU (Shradha Todi)
- Add upper limit address for outbound iATU (Shradha Todi)
- Make dw_pcie ops optional (Jisheng Zhang)
- Remove unnecessary dw_pcie_ops from al driver (Jisheng Zhang)
Xilinx Versal CPM PCIe controller driver:
- Fix OF node reference leak (Pan Bian)
Miscellaneous:
- Remove tango host controller driver (Arnd Bergmann)
- Remove IRQ handler & data together (altera-msi, brcmstb, dwc)
(Martin Kaiser)
- Fix xgene-msi race in installing chained IRQ handler (Martin
Kaiser)
- Apply CONFIG_PCI_DEBUG to entire drivers/pci hierarchy (Junhao He)
- Fix pci-bridge-emul array overruns (Russell King)
- Remove obsolete uses of WARN_ON(in_interrupt()) (Sebastian Andrzej
Siewior)"
* tag 'pci-v5.12-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (69 commits)
PCI: qcom: Use PHY_REFCLK_USE_PAD only for ipq8064
PCI: qcom: Add support for ddrss_sf_tbu clock
dt-bindings: PCI: qcom: Document ddrss_sf_tbu clock for sm8250
PCI: al: Remove useless dw_pcie_ops
PCI: dwc: Don't assume the ops in dw_pcie always exist
PCI: dwc: Add upper limit address for outbound iATU
PCI: dwc: Change size to u64 for EP outbound iATU
PCI: dwc: Drop support for config space in 'ranges'
PCI: layerscape: Convert to builtin_platform_driver()
PCI: layerscape: Add LX2160A rev2 EP mode support
dt-bindings: PCI: layerscape: Add LX2160A rev2 compatible strings
PCI: dwc: Work around ECRC configuration issue
PCI/portdrv: Report reset for frozen channel
PCI/AER: Specify the type of Port that was reset
PCI/ERR: Retain status from error notification
PCI/AER: Clear AER status from Root Port when resetting Downstream Port
PCI/ERR: Clear status of the reporting device
dt-bindings: arm: rockchip: Add FriendlyARM NanoPi M4B
PCI: rockchip: Make 'ep-gpios' DT property optional
Documentation: PCI: Add PCI endpoint NTB function user guide
...
Some devices, including most Microsoft Surface devices, have a platform
profile somewhere inbetween balanced and performance. More specifically,
adding this profile allows the following mapping on Surface devices:
Vendor Name Platform Profile
------------------------------------------
Battery Saver low-power
Recommended balanced
Better Performance balanced-performance
Best Performance performance
Suggested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maximilian Luz <luzmaximilian@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
The ACPI_PLATFORM_PROFILE option essentially provides a library and not
really an independent module. Thus it seems to be more user-friendly to
hide this option and simply make drivers depending on it select it.
Suggested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maximilian Luz <luzmaximilian@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Fix race condition in generic_serial_bus (I2C) and GPIO
Operation Region handling in ACPICA and reduce some related
code duplication (Hans de Goede).
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Merge tag 'acpi-5.12-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more ACPI updates from Rafael Wysocki:
"Fix race condition in generic_serial_bus (I2C) and GPIO Operation
Region handling in ACPICA and reduce some related code duplication
(Hans de Goede)"
* tag 'acpi-5.12-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPICA: Remove some code duplication from acpi_ev_address_space_dispatch
ACPICA: Fix race in generic_serial_bus (I2C) and GPIO op_region parameter handling
* acpica:
ACPICA: Remove some code duplication from acpi_ev_address_space_dispatch
ACPICA: Fix race in generic_serial_bus (I2C) and GPIO op_region parameter handling
thermal driver (Daniel Lezcano)
- Remove the notify ops as it is no longer used (Daniel Lezcano)
- Remove the 'forced passive' option and the unused bind/unbind
functions (Daniel Lezcano)
- Remove the THERMAL_TRIPS_NONE and the code cleanup around this
macro (Daniel Lezcano)
- Rework the delays to make them pre-computed instead of computing
them again and again at each polling interval (Daniel Lezcano)
- Remove the pointless 'thermal_zone_device_reset' function (Daniel
Lezcano)
- Use the critical and hot ops to prevent an unexpected system
shutdown on int340x (Kai-Heng Feng)
- Make the cooling device state private to the thermal subsystem
(Daniel Lezcano)
- Prevent to use not-power-aware actor devices with the power
allocator governor (Lukasz Luba)
- Remove 'zx' and 'tango' support along with the corresponding
platforms (Arnd Bergman)
- Fix several issues on the Omap thermal driver (Tony Lindgren)
- Add support for adc-tm5 PMIC thermal monitor for Qcom
platforms. Please note those changes rely on an immutable branch:
iio-thermal-5.11-rc1/ib-iio-thermal-5.11-rc1 from the iio tree
(Dmitry Baryshkov)
- Fix an initialization loop in the adc-tm5 (Colin Ian King)
- Fix a return error check in the cpufreq cooling device (Viresh Kumar)
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Merge tag 'thermal-v5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thermal/linux
Pull thermal updates from Daniel Lezcano:
- Use the newly introduced 'hot' and 'critical' ops for the acpi
thermal driver (Daniel Lezcano)
- Remove the notify ops as it is no longer used (Daniel Lezcano)
- Remove the 'forced passive' option and the unused bind/unbind
functions (Daniel Lezcano)
- Remove the THERMAL_TRIPS_NONE and the code cleanup around this macro
(Daniel Lezcano)
- Rework the delays to make them pre-computed instead of computing them
again and again at each polling interval (Daniel Lezcano)
- Remove the pointless 'thermal_zone_device_reset' function (Daniel
Lezcano)
- Use the critical and hot ops to prevent an unexpected system shutdown
on int340x (Kai-Heng Feng)
- Make the cooling device state private to the thermal subsystem
(Daniel Lezcano)
- Prevent to use not-power-aware actor devices with the power allocator
governor (Lukasz Luba)
- Remove 'zx' and 'tango' support along with the corresponding
platforms (Arnd Bergman)
- Fix several issues on the Omap thermal driver (Tony Lindgren)
- Add support for adc-tm5 PMIC thermal monitor for Qcom platforms
(Dmitry Baryshkov)
- Fix an initialization loop in the adc-tm5 (Colin Ian King)
- Fix a return error check in the cpufreq cooling device (Viresh Kumar)
* tag 'thermal-v5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thermal/linux: (26 commits)
thermal: cpufreq_cooling: freq_qos_update_request() returns < 0 on error
thermal: qcom: Fix comparison with uninitialized variable channels_available
thermal: qcom: add support for adc-tm5 PMIC thermal monitor
dt-bindings: thermal: qcom: add adc-thermal monitor bindings
thermal: ti-soc-thermal: Use non-inverted define for omap4
thermal: ti-soc-thermal: Simplify polling with iopoll
thermal: ti-soc-thermal: Fix stuck sensor with continuous mode for 4430
thermal: ti-soc-thermal: Skip pointless register access for dra7
thermal/drivers/zx: Remove zx driver
thermal/drivers/tango: Remove tango driver
thermal: power allocator: fail binding for non-power actor devices
thermal/core: Make cooling device state change private
thermal: intel: pch: Fix unexpected shutdown at critical temperature
thermal: int340x: Fix unexpected shutdown at critical temperature
thermal/core: Remove pointless thermal_zone_device_reset() function
thermal/core: Remove ms based delay fields
thermal/core: Use precomputed jiffies for the polling
thermal/core: Precompute the delays from msecs to jiffies
thermal/core: Remove unused macro THERMAL_TRIPS_NONE
thermal/core: Remove THERMAL_TRIPS_NONE test
...
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Merge tag 'media/v5.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
Pull media updates from Mauro Carvalho Chehab:
- some core fixes in VB2 mem2mem support
- some improvements and cleanups in V4L2 async kAPI
- newer controls in V4L2 API for H-264 and HEVC codecs
- allegro-dvt driver was promoted from staging
- new i2c sendor drivers: imx334, ov5648, ov8865
- new automobile camera module: rdacm21
- ipu3 cio2 driver started gained support for some ACPI BIOSes
- new ATSC frontend: MaxLinear mxl692 VSB tuner/demod
- the SMIA/CCS driver gained more support for CSS standard
- several driver fixes, updates and improvements
* tag 'media/v5.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (362 commits)
media: v4l: async: Fix kerneldoc documentation for async functions
media: i2c: max9271: Add MODULE_* macros
media: i2c: Kconfig: Make MAX9271 a module
media: imx334: 'ret' is uninitialized, should have been PTR_ERR()
media: i2c: Add imx334 camera sensor driver
media: dt-bindings: media: Add bindings for imx334
media: ov8856: Configure sensor for GRBG Bayer for all modes
media: i2c: imx219: Implement V4L2_CID_LINK_FREQ control
media: ov5675: fix vflip/hflip control
media: ipu3-cio2: Build bridge only if ACPI is enabled
media: Remove the legacy v4l2-clk API
media: ov6650: Use the generic clock framework
media: mt9m111: Use the generic clock framework
media: ov9640: Use the generic clock framework
media: pxa_camera: Drop the v4l2-clk clock register
media: mach-pxa: Register the camera sensor fixed-rate clock
media: i2c: imx258: get clock from device properties and enable it via runtime PM
media: i2c: imx258: simplify getting state container
media: i2c: imx258: add support for binding via device tree
media: dt-bindings: media: imx258: add bindings for IMX258 sensor
...
- Update ACPICA code in the kernel to upstream revision 20201113
with changes as follows:
* Remove the MTMR (Mid-Timer) table (Al Stone).
* Remove the VRTC table (Al Stone).
* Add type casts for string functions (Bob Moore).
* Update all copyrights to 2021 (Bob Moore).
* Fix exception code class checks (Maximilian Luz).
* Clean up exception code class checks (Maximilian Luz).
* Fix -Wfallthrough (Nick Desaulniers).
- Add support for setting and reading global profile of the platform
along with documentation (Mark Pearson, Hans de Goede, Jiaxun Yang).
- Fix fwnode properties matching and clean up the code handling
device properties and its documentation (Rafael Wysocki, Andy
Shevchenko).
- Clean up ACPI-based device enumeration code (Rafael Wysocki).
- Clean up the CPPC support library code (Ionela Voinescu).
- Clean up the APEI support code (Yang Li, Yazen Ghannam).
- Update GPIO-related properties documentation (Flavio Suligoi).
- Consolidate and clean up the printing of messages in several
places (Rafael Wysocki).
- Fix error code path in configfs handling code (Qinglang Miao).
- Use DEVICE_ATTR_<RW|RO|WO> macros where applicable (Dwaipayan Ray).
- Replace tests for !ACPI_FAILURE with tests for ACPI_SUCCESS in
multiple places (Bjorn Helgaas).
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Merge tag 'acpi-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI updates from Rafael Wysocki:
"These update the ACPICA code in the kernel to upstream revision
20210105, fix and clean up the handling of device properties, add
support for setting global profile of the platform, clean up device
enumeration, the CPPC library, the APEI support and more, update the
documentation, consolidate the printing of messages in several places
and make assorted janitorial changes.
Specifics:
- Update ACPICA code in the kernel to upstream revision 20201113 with
changes as follows:
* Remove the MTMR (Mid-Timer) table (Al Stone).
* Remove the VRTC table (Al Stone).
* Add type casts for string functions (Bob Moore).
* Update all copyrights to 2021 (Bob Moore).
* Fix exception code class checks (Maximilian Luz).
* Clean up exception code class checks (Maximilian Luz).
* Fix -Wfallthrough (Nick Desaulniers).
- Add support for setting and reading global profile of the platform
along with documentation (Mark Pearson, Hans de Goede, Jiaxun
Yang).
- Fix fwnode properties matching and clean up the code handling
device properties and its documentation (Rafael Wysocki, Andy
Shevchenko).
- Clean up ACPI-based device enumeration code (Rafael Wysocki).
- Clean up the CPPC support library code (Ionela Voinescu).
- Clean up the APEI support code (Yang Li, Yazen Ghannam).
- Update GPIO-related properties documentation (Flavio Suligoi).
- Consolidate and clean up the printing of messages in several places
(Rafael Wysocki).
- Fix error code path in configfs handling code (Qinglang Miao).
- Use DEVICE_ATTR_<RW|RO|WO> macros where applicable (Dwaipayan Ray).
- Replace tests for !ACPI_FAILURE with tests for ACPI_SUCCESS in
multiple places (Bjorn Helgaas)"
* tag 'acpi-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (44 commits)
ACPI: property: Satisfy kernel doc validator (part 2)
ACPI: property: Satisfy kernel doc validator (part 1)
ACPI: property: Make acpi_node_prop_read() static
ACPI: property: Remove dead code
ACPI: property: Fix fwnode string properties matching
ACPI: OSL: Clean up printing messages
ACPI: OSL: Rework acpi_check_resource_conflict()
ACPI: APEI: ERST: remove unneeded semicolon
ACPI: thermal: Clean up printing messages
ACPI: video: Clean up printing messages
ACPI: button: Clean up printing messages
ACPI: battery: Clean up printing messages
ACPI: AC: Clean up printing messages
ACPI: bus: Drop ACPI_BUS_COMPONENT which is not used any more
ACPI: utils: Clean up printing messages
ACPI: scan: Clean up printing messages
ACPI: bus: Clean up printing messages
ACPI: PM: Clean up printing messages
ACPI: power: Clean up printing messages
ACPI: APEI: Add is_generic_error() to identify GHES sources
...
Here is the big set of USB and Thunderbolt driver changes for 5.12-rc1.
It's been an active set of development in these subsystems for the past
few months:
- loads of typec features added for new hardware
- xhci features and bugfixes
- dwc3 features added for more hardware support
- dwc2 fixes and new hardware support
- cdns3 driver updates for more hardware support
- gadget driver cleanups and minor fixes
- usb-serial fixes, new driver, and more devices supported
- thunderbolt feature additions for new hardware
- lots of other tiny fixups and additions
The chrome driver changes are in here as well, as they depended on some
of the typec changes, and the maintainer acked them.
All of these have been in linux-next for a while with no reported
issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB and Thunderbolt updates from Greg KH:
"Here is the big set of USB and Thunderbolt driver changes for
5.12-rc1.
It's been an active set of development in these subsystems for the
past few months:
- loads of typec features added for new hardware
- xhci features and bugfixes
- dwc3 features added for more hardware support
- dwc2 fixes and new hardware support
- cdns3 driver updates for more hardware support
- gadget driver cleanups and minor fixes
- usb-serial fixes, new driver, and more devices supported
- thunderbolt feature additions for new hardware
- lots of other tiny fixups and additions
The chrome driver changes are in here as well, as they depended on
some of the typec changes, and the maintainer acked them.
All of these have been in linux-next for a while with no reported
issues"
* tag 'usb-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (300 commits)
dt-bindings: usb: mediatek: musb: add mt8516 compatbile
dt-bindings: usb: mtk-xhci: add compatible for mt2701 and mt7623
dt-bindings: usb: mtk-xhci: add optional assigned clock properties
Documentation: connector: Update the description of sink-vdos
usb: misc: usb3503: Fix logic in usb3503_init()
dt-bindings: usb: usb-device: fix typo in required properties
usb: Replace lkml.org links with lore
dt-bindings: usb: dwc3: add description for rk3328
dt-bindings: usb: convert rockchip,dwc3.txt to yaml
usb: quirks: add quirk to start video capture on ELMO L-12F document camera reliable
USB: quirks: sort quirk entries
USB: serial: drop bogus to_usb_serial_port() checks
USB: serial: make remove callback return void
USB: serial: drop if with an always false condition
usb: gadget: Assign boolean values to a bool variable
usb: typec: tcpm: Get Sink VDO from fwnode
dt-bindings: connector: Add SVDM VDO properties
usb: typec: displayport: Fill the negotiated SVDM Version in the header
usb: typec: ucsi: Determine common SVDM Version
usb: typec: tcpm: Determine common SVDM Version
...
ACPICA commit 383f50ff8cb7424ca16a6c0234f103b41d4a783e
The handling of the space_id == ACPI_ADR_SPACE_GSBUS and
space_id == ACPI_ADR_SPACE_GPIO cases is almost identical,
fold the 2 cases into 1 to remove some code duplication.
Link: https://github.com/acpica/acpica/commit/383f50ff
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Erik Kaneda <erik.kaneda@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
ACPICA commit c9e0116952363b0fa815143dca7e9a2eb4fefa61
The handling of the generic_serial_bus (I2C) and GPIO op_regions in
acpi_ev_address_space_dispatch() passes a number of extra parameters
to the address-space handler through the address-space Context pointer
(instead of using more function parameters).
The Context is shared between threads, so if multiple threads try to
call the handler for the same address-space at the same time, then
a second thread could change the parameters of a first thread while
the handler is running for the first thread.
An example of this race hitting is the Lenovo Yoga Tablet2 1015L,
where there are both attrib_bytes accesses and attrib_byte accesses
to the same address-space. The attrib_bytes access stores the number
of bytes to transfer in Context->access_length. Where as for the
attrib_byte access the number of bytes to transfer is always 1 and
field_obj->Field.access_length is unused (so 0). Both types of
accesses racing from different threads leads to the following problem:
1. Thread a. starts an attrib_bytes access, stores a non 0 value
from field_obj->Field.access_length in Context->access_length
2. Thread b. starts an attrib_byte access, stores 0 in
Context->access_length
3. Thread a. calls i2c_acpi_space_handler() (under Linux). Which
sees that the access-type is ACPI_GSB_ACCESS_ATTRIB_MULTIBYTE
and calls acpi_gsb_i2c_read_bytes(..., Context->access_length)
4. At this point Context->access_length is 0 (set by thread b.)
rather then the field_obj->Field.access_length value from thread a.
This 0 length reads leads to the following errors being logged:
i2c i2c-0: adapter quirk: no zero length (addr 0x0078, size 0, read)
i2c i2c-0: i2c read 0 bytes from client@0x78 starting at reg 0x0 failed, error: -95
Note this is just an example of the problems which this race can cause.
There are likely many more (sporadic) problems caused by this race.
This commit adds a new context_mutex to struct acpi_object_addr_handler
and makes acpi_ev_address_space_dispatch() take that mutex when
using the shared Context to pass extra parameters to an address-space
handler, fixing this race.
Note the new mutex must be taken *after* exiting the interpreter,
therefor the existing acpi_ex_exit_interpreter() call is moved to above
the code which stores the extra parameters in the Context.
Link: https://github.com/acpica/acpica/commit/c9e01169
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Erik Kaneda <erik.kaneda@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* acpi-messages:
ACPI: OSL: Clean up printing messages
ACPI: OSL: Rework acpi_check_resource_conflict()
ACPI: thermal: Clean up printing messages
ACPI: video: Clean up printing messages
ACPI: button: Clean up printing messages
ACPI: battery: Clean up printing messages
ACPI: AC: Clean up printing messages
ACPI: bus: Drop ACPI_BUS_COMPONENT which is not used any more
ACPI: utils: Clean up printing messages
ACPI: scan: Clean up printing messages
ACPI: bus: Clean up printing messages
ACPI: PM: Clean up printing messages
ACPI: power: Clean up printing messages
CHECK drivers/acpi/property.c
warning: Function parameter or member '__fwnode' not described in 'acpi_graph_get_remote_endpoint'
warning: Excess function parameter 'fwnode' description in 'acpi_graph_get_remote_endpoint'
warning: Excess function parameter 'endpoint' description in 'acpi_graph_get_remote_endpoint'
Fixes: 0ef7478639 ("ACPI: property: Make the ACPI graph API private")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
CHECK drivers/acpi/property.c
warning: Function parameter or member 'data' not described in 'acpi_data_get_property_array'
warning: Excess function parameter 'adev' description in 'acpi_data_get_property_array'
Fixes: 3a7a2ab839 ("ACPI / property: Extend fwnode_property_* to data-only subnodes")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
There is no users outside of property.c. No need to export
acpi_node_prop_read(), hence make it static.
Fixes: 3708184afc ("device property: Move FW type specific functionality to FW specific files")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
After the commit 3a7a2ab839 couple of functions became a dead code.
Moreover, for all these years nobody used them. Remove.
Fixes: 3a7a2ab839 ("ACPI / property: Extend fwnode_property_* to data-only subnodes")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Property matching does not work for ACPI fwnodes if the value of the
given property is not represented as a package in the _DSD package
containing it. For example, the "compatible" property in the _DSD
below
Name (_DSD, Package () {
ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
Package () {
Package () {"compatible", "ethernet-phy-ieee802.3-c45"}
}
})
will not be found by fwnode_property_match_string(), because the ACPI
code handling device properties does not regard the single value as a
"list" in that case.
Namely, fwnode_property_match_string() invoked to match a given
string property value first calls fwnode_property_read_string_array()
with the last two arguments equal to NULL and 0, respectively, in
order to count the items in the value of the given property, with the
assumption that this value may be an array. For ACPI fwnodes, that
operation is carried out by acpi_node_prop_read() which calls
acpi_data_prop_read() for this purpose. However, when the return
(val) pointer is NULL, that function only looks for a property whose
value is a package without checking the single-value case at all.
To fix that, make acpi_data_prop_read() check the single-value
case if its return pointer argument is NULL and modify
acpi_data_prop_read_single() handling that case to attempt to
read the value of the property if the return pointer is NULL
and return 1 if that succeeds.
Fixes: 3708184afc ("device property: Move FW type specific functionality to FW specific files")
Reported-by: Calvin Johnson <calvin.johnson@oss.nxp.com>
Cc: 4.13+ <stable@vger.kernel.org> # 4.13+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Replace the ACPI_DEBUG_PRINT() instance in osl.c unrelated to the
ACPICA debug with acpi_handle_debug(), add a pr_fmt() definition
to osl.c and replace direct printk() usage in that file with the
suitable pr_*() calls.
While at it, add a physical address value to the message in
acpi_os_map_iomem() and reword a couple of messages to avoid
using function names in them.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Rearrange the code in acpi_check_resource_conflict() so as to drop
redundant checks and uneeded local variables from there and modify
the messages printed by that function to be more concise and
hopefully easier to understand.
While at it, replace direct printk() usage with pr_*().
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This includes following Thunderbolt/USB4 changes for v5.12 merge
window:
* Start lane initialization after sleep for Thunderbolt 3 compatible
devices
* Add support for de-authorizing PCIe tunnels (software based
connection manager only)
* Add support for new ACPI 6.4 USB4 _OSC
* Allow disabling XDomain protocol
* Add support for new SL5 security level
* Clean up kernel-docs to pass W=1 builds
* A couple of cleanups and minor fixes
All these have been in linux-next without reported issues.
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Merge tag 'thunderbolt-for-v5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/westeri/thunderbolt into usb-next
Mika writes:
thunderbolt: Changes for v5.12 merge window
This includes following Thunderbolt/USB4 changes for v5.12 merge
window:
* Start lane initialization after sleep for Thunderbolt 3 compatible
devices
* Add support for de-authorizing PCIe tunnels (software based
connection manager only)
* Add support for new ACPI 6.4 USB4 _OSC
* Allow disabling XDomain protocol
* Add support for new SL5 security level
* Clean up kernel-docs to pass W=1 builds
* A couple of cleanups and minor fixes
All these have been in linux-next without reported issues.
* tag 'thunderbolt-for-v5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/westeri/thunderbolt: (27 commits)
thunderbolt: Add support for native USB4 _OSC
ACPI: Add support for native USB4 control _OSC
ACPI: Execute platform _OSC also with query bit clear
thunderbolt: Allow disabling XDomain protocol
thunderbolt: Add support for PCIe tunneling disabled (SL5)
thunderbolt: dma_test: Drop unnecessary include
thunderbolt: Add clarifying comments about USB4 terms router and adapter
thunderbolt: switch: Fix kernel-doc descriptions of non-static functions
thunderbolt: nhi: Fix kernel-doc descriptions of non-static functions
thunderbolt: path: Fix kernel-doc descriptions of non-static functions
thunderbolt: eeprom: Fix kernel-doc descriptions of non-static functions
thunderbolt: ctl: Fix kernel-doc descriptions of non-static functions
thunderbolt: switch: Fix function name in the header
thunderbolt: tunnel: Fix misspelling of 'receive_path'
thunderbolt: icm: Fix a couple of formatting issues
thunderbolt: switch: Demote a bunch of non-conformant kernel-doc headers
thunderbolt: tb: Kernel-doc function headers should document their parameters
thunderbolt: nhi: Demote some non-conformant kernel-doc headers
thunderbolt: xdomain: Fix 'tb_unregister_service_driver()'s 'drv' param
thunderbolt: eeprom: Demote non-conformant kernel-doc headers to standard comment blocks
...
This reverts commit 32cf1a12ca.
The 'exisitng buffer' in this case is the firmware provided table, and
we should not modify that in place. This fixes a crash on arm64 with
initrd table overrides, in which case the DSDT is not mapped with
read/write permissions.
Reported-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Tested-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
- Fix a crash when sysfs accesses race 'dimm' driver probe/remove.
- Fix a regression in 'resource' attribute visibility necessary for
mapping badblocks and other physical address interrogations.
- Fix some flexible array warnings
- Expand the unit test infrastructure for non-ACPI platforms
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Merge tag 'libnvdimm-fixes-5.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull libnvdimm fixes from Dan Williams:
"A fix for a crash scenario that has been present since the initial
merge, a minor regression in sysfs attribute visibility, and a fix for
some flexible array warnings.
The bulk of this pull is an update to the libnvdimm unit test
infrastructure to test non-ACPI platforms. Given there is zero
regression risk for test updates, and the tests enable validation of
bits headed towards the next merge window, I saw no reason to hold the
new tests back. Santosh originally submitted this before the v5.11
window opened.
Summary:
- Fix a crash when sysfs accesses race 'dimm' driver probe/remove.
- Fix a regression in 'resource' attribute visibility necessary for
mapping badblocks and other physical address interrogations.
- Fix some flexible array warnings
- Expand the unit test infrastructure for non-ACPI platforms"
* tag 'libnvdimm-fixes-5.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
libnvdimm/dimm: Avoid race between probe and available_slots_show()
ndtest: Add papr health related flags
ndtest: Add nvdimm control functions
ndtest: Add regions and mappings to the test buses
ndtest: Add dimm attributes
ndtest: Add dimms to the two buses
ndtest: Add compatability string to treat it as PAPR family
testing/nvdimm: Add test module for non-nfit platforms
libnvdimm/namespace: Fix visibility of namespace resource attribute
libnvdimm/pmem: Remove unused header
ACPI: NFIT: Fix flexible_array.cocci warnings
Eliminate the following coccicheck warning:
./drivers/acpi/apei/erst.c:691:2-3: Unneeded semicolon
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Replace the ACPI_DEBUG_PRINT() instances in thermal.c with
acpi_handle_debug() calls and modify the ACPI_THERMAL_TRIPS_EXCEPTION()
macro in there to use acpi_handle_info() internally, which among other
things causes the excessive log level of the messages printed by it to
be increased.
Drop the _COMPONENT and ACPI_MODULE_NAME() definitions that are not
used any more from thermal.c, drop the no longer needed
ACPI_THERMAL_COMPONENT definition from the headers and update the
documentation accordingly.
While at it, add a pr_fmt() definition to thermal.c, drop the PREFIX
definition from there and replace some pr_warn() calls with pr_info()
or acpi_handle_info() to reduce the excessive log level and (in the
latter case) facilitate easier identification of the message source.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Replace the ACPI_DEBUG_PRINT() instances in acpi_video.c with
acpi_handle_debug() calls and the ACPI_EXCEPTION()/ACPI_ERROR()/
ACPI_WARNING() instances in there with acpi_handle_info() calls,
which among other things causes the excessive log levels of those
messages to be increased.
Drop the _COMPONENT and ACPI_MODULE_NAME() definitions that are not
used any more from acpi_video.c, drop the no longer needed
ACPI_VIDEO_COMPONENT definition from the headers and update the
documentation accordingly.
While at it, add a pr_fmt() definition to acpi_video.c, replace the
direct printk() invocations in there with acpi_handle_info() or
pr_info() (and reduce the excessive log level where applicable) and
drop the PREFIX sybmbol definition which is not necessary any more
from acpi_video.c.
Also make unrelated janitorial changes to fix up white space and
use ACPI_FAILURE() instead of negating ACPI_SUCCESS().
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Replace the ACPI_DEBUG_PRINT() instance in button.c with an
acpi_handle_debug() call, drop the _COMPONENT and ACPI_MODULE_NAME()
definitions that are not used any more, drop the no longer needed
ACPI_BUTTON_COMPONENT definition from the headers and update the
documentation accordingly.
While at it, replace the direct printk() invocations with pr_info()
(that changes the excessive log level for some of them too) and drop
the unneeded PREFIX sybmbol definition from battery.c.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Replace the ACPI_DEBUG_PRINT() and ACPI_EXCEPTION() instances
in battery.c with acpi_handle_debug() and acpi_handle_info() calls,
respectively, which among other things causes the excessive log
level of the messages previously printed via ACPI_EXCEPTION() to
be increased.
Drop the _COMPONENT and ACPI_MODULE_NAME() definitions that are not
used any more, drop the no longer needed ACPI_BATTERY_COMPONENT
definition from the headers and update the documentation accordingly.
While at it, update the pr_fmt() definition and drop the unneeded
PREFIX sybmbol definition from battery.c. Also adapt the existing
pr_info() calls to the new pr_fmt() definition.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Replace the ACPI_DEBUG_PRINT() and ACPI_EXCEPTION() instances
in ac.c with acpi_handle_debug() and acpi_handle_info() calls,
respectively, which among other things causes the excessive log
level of the messages previously printed via ACPI_EXCEPTION() to
be increased.
Drop the _COMPONENT and ACPI_MODULE_NAME() definitions that are not
used any more, drop the no longer needed ACPI_AC_COMPONENT definition
from the headers and update the documentation accordingly.
While at it, replace the direct printk() invocation with pr_info(),
add a pr_fmt() definition to ac.c and drop the unneeded PREFIX
symbol definition from there.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
After dropping all of the code using ACPI_BUS_COMPONENT drop it
too and modify the example in the documentation using it.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Replace all of the ACPI_DEBUG_PRINT() instances in utils.c with
pr_debug() and acpi_handle_debug(), drop the _COMPONENT and
ACPI_MODULE_NAME() definitions that are not used any more and
replace direct printk() invocations with pr_debug() calls (the log
level in there is way excessive).
Also add a special pr_fmt() definition, but this only affects the
pr_debug() messages mentioned above.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Replace all of the ACPI_DEBUG_PRINT() and ACPI_EXCEPTION() instances
in scan.c with acpi_handle_debug() and acpi_handle_info(), respectively,
and drop the _COMPONENT and ACPI_MODULE_NAME() definitions that
are not used any more.
While at it, drop the redundant "Memory allocation error" message
from acpi_add_single_object() and clean up the list of local variables
in that function.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reported-by: kernel test robot <lkp@intel.com>
Replace all of the ACPI_DEBUG_PRINT() and ACPI_EXCEPTION() instances
in bus.c with pr_debug() and pr_info(), respectively, drop the
_COMPONENT and ACPI_MODULE_NAME() definitions that are not used any
more and replace direct printk() invocations with the matching
pr_*() calls (with a couple of exceptions where the log level is
decreased).
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Replace the remaining ACPI_DEBUG_PRINT() instances in device_pm.c
with dev_dbg() invocations, drop the _COMPONENT and ACPI_MODULE_NAME()
definitions that are not used any more, and drop the no longer needed
ACPI_POWER_COMPONENT definition from the headers and documentation.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Replace all of the ACPI_DEBUG_PRINT() instances in power.c with
acpi_handle_debug() or pr_debug(), depending on the context,
drop the _COMPONENT and ACPI_MODULE_NAME() definitions that
are not used any more, and replace the direct invocations of
printk() in there with acpi_handle_info() or pr_info(), depending
on the context.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
