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linux/drivers/acpi
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Rafael J. Wysocki 71fe2aff46 ACPI: CPPC: Do not prevent CPPC from working in the future 
[ Upstream commit 4f4179fcf4 ]

There is a problem with the current revision checks in
is_cppc_supported() that they essentially prevent the CPPC support
from working if a new _CPC package format revision being a proper
superset of the v3 and only causing _CPC to return a package with more
entries (while retaining the types and meaning of the entries defined by
the v3) is introduced in the future and used by the platform firmware.

In that case, as long as the number of entries in the _CPC return
package is at least CPPC_V3_NUM_ENT, it should be perfectly fine to
use the v3 support code and disregard the additional package entries
added by the new package format revision.

For this reason, drop is_cppc_supported() altogether, put the revision
checks directly into acpi_cppc_processor_probe() so they are easier to
follow and rework them to take the case mentioned above into account.

Fixes: 4773e77cdc ("ACPI / CPPC: Add support for CPPC v3")
Cc: 4.18+ <stable@vger.kernel.org> # 4.18+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2022-08-17 15:16:13 +02:00
..
acpica Revert "ACPICA: executer/exsystem: Warn about sleeps greater than 10 ms" 2022-05-21 18:02:26 +02:00
apei ACPI: APEI: Fix _EINJ vs EFI_MEMORY_SP 2022-08-17 15:14:12 +02:00
arm64 ACPI: AGDI: Fix missing prototype warning for acpi_agdi_init() 2022-05-06 20:35:44 +02:00
dptf ACPI: DPTF: Support Meteor Lake 2022-05-25 15:37:07 +02:00
nfit cxl for 5.19 2022-05-27 21:24:19 -07:00
numa cxl for 5.17 2022-01-12 15:57:59 -08:00
pmic ACPI: PMIC: xpower: Fix _TMP ACPI errors 2021-12-08 15:34:57 +01:00
x86 platform-drivers-x86 for v5.18-1 2022-03-25 12:14:39 -07:00
ac.c ACPI: clean up white space in a few places for consistency 2022-05-12 16:54:49 +02:00
acpi_adxl.c ACPI/ADXL: Add address translation interface using an ACPI DSM 2018-10-16 10:03:00 +02:00
acpi_amba.c ACPI: AMBA: Fix resource name in /proc/iomem 2021-06-30 20:01:10 +02:00
acpi_apd.c i2c: designware: Add AMD PSP I2C bus support 2022-02-11 15:38:23 +01:00
acpi_cmos_rtc.c ACPI: cmos_rtc: Using pr_fmt() and remove PREFIX 2021-06-07 15:36:45 +02:00
acpi_configfs.c ACPI: configfs: Make get_header() to return error pointer 2021-07-16 19:20:28 +02:00
acpi_dbg.c ACPI: debug: Remove the not used function 2020-11-17 18:12:34 +01:00
acpi_extlog.c ACPI / extlog: Check for RDMSR failure 2020-10-02 19:01:55 +02:00
acpi_fpdt.c ACPI: tables: FPDT: Do not print FW_BUG message if record types are reserved 2021-08-25 20:01:07 +02:00
acpi_ipmi.c ACPI: IPMI: replace usage of found with dedicated list iterator variable 2022-03-25 18:01:40 +01:00
acpi_lpat.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
acpi_lpit.c ACPI: LPIT: Put the low power idle table after using it 2020-05-09 11:29:16 +02:00
acpi_lpss.c ACPI: LPSS: Fix missing check in register_device_clock() 2022-08-17 15:14:04 +02:00
acpi_memhotplug.c ACPI: memhotplug: use a single static memory group for a single memory device 2021-09-08 11:50:23 -07:00
acpi_pad.c ACPI: Add perf low power callback 2022-04-05 10:24:38 +02:00
acpi_pcc.c ACPI: PCC: pcc_ctx can be static 2022-01-12 19:40:31 +01:00
acpi_platform.c ACPI: platform: Constify properties parameter in acpi_create_platform_device() 2022-03-01 20:36:34 +01:00
acpi_pnp.c ACPI: PNP: remove duplicated BRI0A49 and BDP3336 entries 2021-09-24 18:12:15 +02:00
acpi_processor.c ACPI: processor: Replace deprecated CPU-hotplug functions 2021-08-04 20:25:54 +02:00
acpi_tad.c ACPI: Use DEVICE_ATTR_<RW|RO|WO> macros 2021-01-22 16:17:19 +01:00
acpi_video.c ACPI: video: Fix acpi_video_handles_brightness_key_presses() 2022-07-14 21:40:20 +02:00
acpi_watchdog.c ACPI: watchdog: Replace open coded variant of resource_union() 2020-11-17 18:06:29 +01:00
battery.c ACPI: battery: Make "not-charging" the default on no charging or full info 2022-05-06 20:37:51 +02:00
bgrt.c ACPI: BGRT: use static for BGRT_SHOW kobj_attribute defines 2022-04-22 16:55:33 +02:00
blacklist.c ACPI: blacklist: Unify the message printing 2021-06-07 15:36:45 +02:00
bus.c ACPI: VIOT: Fix ACS setup 2022-08-17 15:14:14 +02:00
button.c ACPI: button: Add DMI quirk for Lenovo Yoga 9 (14INTL5) 2021-08-25 19:57:01 +02:00
container.c ACPI: container: Remove leftover ACPICA debug functionality 2020-09-25 18:25:51 +02:00
cppc_acpi.c ACPI: CPPC: Do not prevent CPPC from working in the future 2022-08-17 15:16:13 +02:00
custom_method.c ACPI: custom_method: fix a possible memory leak 2021-04-28 19:17:54 +02:00
debugfs.c ACPI: debugfs: Remove dead ACPICA debug code 2020-09-25 18:25:51 +02:00
device_pm.c Merge branches 'acpi-pm', 'acpi-pci', 'acpi-sysfs' and 'acpi-tables' 2022-05-23 18:29:20 +02:00
device_sysfs.c ACPI: sysfs: use default_groups in kobj_type 2021-12-28 19:15:41 +01:00
dock.c ACPI: Use acpi_fetch_acpi_dev() instead of acpi_bus_get_device() 2021-12-17 18:45:51 +01:00
ec.c ACPI: EC: Drop the EC_FLAGS_IGNORE_DSDT_GPE quirk 2022-08-17 15:14:04 +02:00
ec_sys.c ACPI: EC: Mark the ec_sys write_support param as module_param_hw() 2021-12-01 20:19:30 +01:00
event.c Merge branches 'acpi-ec', 'acpi-apei', 'acpi-soc' and 'acpi-misc' 2021-06-29 15:51:25 +02:00
evged.c ACPI: GED: fix -Wformat 2020-11-09 19:25:20 +01:00
fan.h ACPI: DPTF: Support Meteor Lake 2022-05-25 15:37:07 +02:00
fan_attr.c ACPI: fan: Add additional attributes for fine grain control 2022-02-25 20:49:30 +01:00
fan_core.c ACPI: fan: Add additional attributes for fine grain control 2022-02-25 20:49:30 +01:00
glue.c ACPI: glue: Rearrange find_child_checks() 2022-05-12 16:52:32 +02:00
hed.c ACPI: HED: Drop unused ACPI_MODULE_NAME() definition 2021-03-08 16:51:48 +01:00
internal.h ACPI: scan: Use ida_alloc() instead of ida_simple_get() 2022-02-18 20:16:34 +01:00
ioapic.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
irq.c ACPI: irq: Prevent unregistering of GIC SGIs 2021-04-23 18:00:52 +01:00
Kconfig ACPI: clean up double words in two comments 2022-02-21 20:09:52 +01:00
Makefile ACPI: fan: Separate file for attributes creation 2022-02-25 20:49:29 +01:00
nvs.c Merge branches 'acpi-ec', 'acpi-apei', 'acpi-soc' and 'acpi-misc' 2021-06-29 15:51:25 +02:00
osi.c ACPI: OSI: Shoot duplicate word 2019-11-13 11:12:08 +01:00
osl.c ACPI: OSL: Remove the helper for deactivating memory region 2022-04-27 20:44:55 +02:00
pci_irq.c ACPI: PCI: IRQ: Consolidate printing diagnostic messages 2021-03-08 16:51:08 +01:00
pci_link.c ACPI: clean up double words in two comments 2022-02-21 20:09:52 +01:00
pci_mcfg.c PCI: tegra: Add Tegra194 MCFG quirks for ECAM errata 2021-04-16 11:34:17 -05:00
pci_root.c cxl for 5.19 2022-05-27 21:24:19 -07:00
pci_slot.c ACPI: PCI: Remove unused ACPICA debug code 2020-09-25 18:25:51 +02:00
pfr_telemetry.c ACPI: pfr_telemetry: Fix info leak in pfrt_log_ioctl() 2022-01-10 16:36:45 +01:00
pfr_update.c ACPI: pfr_update: Fix return value check in pfru_write() 2022-01-06 18:53:31 +01:00
platform_profile.c ACPI: platform-profile: call sysfs_notify() from platform_profile_store() 2021-08-16 18:32:02 +02:00
power.c Merge branches 'acpi-scan', 'acpi-pm', 'acpi-power' and 'acpi-pci' 2022-01-10 16:48:27 +01:00
pptt.c topology: Represent clusters of CPUs within a die 2021-10-15 11:25:15 +02:00
prmt.c ACPI: PRM: Handle memory allocation and memory remap failure 2021-10-26 15:29:07 +02:00
proc.c proc: remove PDE_DATA() completely 2022-01-22 08:33:37 +02:00
processor_core.c ACPI: processor: Remove dead ACPICA debug code 2020-09-25 18:25:51 +02:00
processor_driver.c ACPI: Use acpi_fetch_acpi_dev() instead of acpi_bus_get_device() 2021-12-17 18:45:51 +01:00
processor_idle.c ACPI: processor/idle: Annotate more functions to live in cpuidle section 2022-08-17 15:14:07 +02:00
processor_pdc.c ACPI: processor: Get rid of ACPICA message printing 2021-03-08 16:51:19 +01:00
processor_perflib.c ACPI: processor_perflib: Cleanup print messages 2021-06-07 15:36:46 +02:00
processor_thermal.c ACPI: processor: thermal: avoid cpufreq_get_policy() 2021-12-30 19:39:34 +01:00
processor_throttling.c Merge branches 'acpi-dptf' and 'acpi-messages' 2021-06-29 15:50:37 +02:00
property.c ACPI: property: Release subnode properties with data nodes 2022-04-13 19:54:47 +02:00
reboot.c ACPI: reboot: Unify the message printing 2021-06-07 15:36:46 +02:00
resource.c ACPI: Use acpi_fetch_acpi_dev() instead of acpi_bus_get_device() 2021-12-17 18:45:51 +01:00
sbs.c ACPI: sbs: Unify the message printing 2021-06-07 15:36:46 +02:00
sbshc.c Merge branches 'acpi-ec', 'acpi-apei', 'acpi-soc' and 'acpi-misc' 2021-06-29 15:51:25 +02:00
sbshc.h ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00
scan.c ACPI: bus: Eliminate acpi_bus_get_device() 2022-04-05 19:49:26 +02:00
sleep.c ACPI: PM: save NVS memory for Lenovo G40-45 2022-08-17 15:14:04 +02:00
sleep.h Revert "Revert "ACPI: scan: Turn off unused power resources during initialization"" 2021-05-10 14:02:17 +02:00
spcr.c ACPI: SPCR: Add support for NVIDIA 16550-compatible port subtype 2022-04-13 20:37:29 +02:00
sysfs.c ACPI: sysfs: Fix BERT error region memory mapping 2022-04-13 19:58:14 +02:00
tables.c ACPI: tables: Make LAPIC_ADDR_OVR address readable in message 2022-03-25 18:11:42 +01:00
thermal.c Merge branches 'acpi-tables', 'acpi-numa', 'acpi-sysfs', 'acpi-cppc', 'acpi-thermal' and 'acpi-battery' 2022-01-10 17:22:15 +01:00
tiny-power-button.c ACPI: tiny-power-button: Simplify the code using module_acpi_driver() 2020-11-17 18:12:34 +01:00
utils.c ACPI: utils: include UUID in _DSM evaluation warning 2022-05-19 20:06:26 +02:00
video_detect.c ACPI: video: Use native backlight on Dell Inspiron N4010 2022-08-17 15:14:05 +02:00
viot.c ACPI: VIOT: Fix ACS setup 2022-08-17 15:14:14 +02:00
wakeup.c ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00