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linux-rolling-stable
linux/drivers/acpi
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Pengjie Zhang 7e086c97dd ACPI: CPPC: Fix missing PCC check for guaranteed_perf 
commit 6ea3a44cef upstream.

The current implementation overlooks the 'guaranteed_perf'
register in this check.

If the Guaranteed Performance register is located in the PCC
subspace, the function currently attempts to read it without
acquiring the lock and without sending the CMD_READ doorbell
to the firmware. This can result in reading stale data.

Fixes: 29523f0953 ("ACPI / CPPC: Add support for guaranteed performance")
Signed-off-by: Pengjie Zhang <zhangpengjie2@huawei.com>
Cc: 4.20+ <stable@vger.kernel.org> # 4.20+
[ rjw: Subject and changelog edits ]
Link: https://patch.msgid.link/20251210132227.1988380-1-zhangpengjie2@huawei.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2026-01-02 12:56:57 +01:00
..
acpica
ACPICA: Avoid walking the Namespace if start_node is NULL
2026-01-02 12:56:38 +01:00
apei
efi/cper: align ARM CPER type with UEFI 2.9A/2.10 specs
2025-12-18 14:03:41 +01:00
arm64
ACPI: GTDT: Correctly number platform devices for MMIO timers
2025-11-24 13:17:45 +00:00
dptf
ACPI: DPTF: Support for Wildcat Lake
2025-06-18 20:53:52 +02:00
nfit
ACPI: NFIT: Fix incorrect ndr_desc being reportedin dev_err message
2025-09-16 10:57:37 -05:00
numa
acpi/hmat: Fix lockdep warning for hmem_register_resource()
2025-11-12 14:47:55 -07:00
pmic
ACPI: PMIC: Remove unneeded check in tps68470_pmic_opregion_probe()
2024-08-02 17:05:08 +02:00
riscv
ACPI: RIMT: Fix unused function warnings when CONFIG_IOMMU_API is disabled
2025-10-17 21:45:08 -06:00
x86
ACPI: LPSS: Remove AudioDSP related ID
2025-07-02 20:09:11 +02:00
ac.c
ACPI: Switch back to struct platform_driver::remove()
2024-11-12 21:30:30 +01:00
acpi_adxl.c
…
acpi_apd.c
ACPI: APD: Use strscpy() instead of strcpy()
2024-11-05 21:35:35 +01:00
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: fix signedness issues in read/write helpers
2025-09-23 15:45:28 +02:00
acpi_extlog.c
x86/msr: Add explicit includes of <asm/msr.h>
2025-05-02 10:23:47 +02:00
acpi_ffh.c
ACPI: FFH: Drop the inclusion of linux/arm-smccc.h
2023-06-12 19:28:20 +02:00
acpi_fpdt.c
ACPI: FPDT: properly handle invalid FPDT subtables
2023-10-03 21:12:22 +02:00
acpi_ipmi.c
ACPI: IPMI: Add helper to wait for when SMI is selected
2024-04-28 10:07:34 -07:00
acpi_lpat.c
…
acpi_lpit.c
x86/msr: Rename 'rdmsrl_safe()' to 'rdmsrq_safe()'
2025-04-10 11:58:38 +02:00
acpi_memhotplug.c
mm/memory_hotplug: allow memmap on memory hotplug request to fallback
2023-08-21 13:37:48 -07:00
acpi_mrrm.c
ACPI: MRRM: Fix memory leaks and improve error handling
2025-11-07 21:48:49 +01:00
acpi_pad.c
ACPI: PAD: Update arguments of mwait_idle_with_hints()
2025-06-10 20:47:56 +02:00
acpi_pcc.c
ACPI: PCC: Fix race condition by removing static qualifier
2026-01-02 12:56:56 +01:00
acpi_platform.c
ACPI: platform: Move SMB0001 HID to the header and reuse
2023-07-04 19:28:20 +02:00
acpi_pnp.c
Merge tag 'acpi-6.15-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
2025-04-02 15:16:30 -07:00
acpi_processor.c
ACPI: processor: idle: Add module import namespace
2025-09-02 16:08:53 +02:00
acpi_tad.c
ACPI: TAD: Add missing sysfs_remove_group() for ACPI_TAD_RT
2025-09-04 20:19:36 +02:00
acpi_video.c
ACPI: video: Fix use-after-free in acpi_video_switch_brightness()
2025-10-23 20:36:55 +02:00
acpi_watchdog.c
ACPI: use %pe for better readability of errors while printing
2024-02-16 19:31:12 +01:00
battery.c
ACPI: battery: Add synchronization between interface updates
2025-09-28 12:25:02 +02:00
bgrt.c
sysfs: treewide: switch back to attribute_group::bin_attrs
2025-06-17 10:44:15 +02:00
bus.c
ACPI: Fix typos
2025-07-22 17:12:41 +02:00
button.c
ACPI: button: Call input_free_device() on failing input device registration
2025-10-22 21:19:23 +02:00
container.c
ACPI: container: Use acpi_dev_for_each_child()
2022-06-20 20:33:05 +02:00
cppc_acpi.c
ACPI: CPPC: Fix missing PCC check for guaranteed_perf
2026-01-02 12:56:57 +01:00
debugfs.c
…
device_pm.c
Merge tag 'acpi-6.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
2025-07-28 20:44:42 -07:00
device_sysfs.c
ACPI: sysfs: Use ACPI_FREE() for freeing an ACPI object
2025-08-25 20:21:44 +02:00
dock.c
ACPI: scan: Introduce typedef:s for struct acpi_hotplug_context members
2024-04-04 21:19:02 +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
ec.c
ACPI: EC: Relax sanity check of the ECDT ID string
2025-08-12 19:16:27 +02:00
event.c
ACPI: event: Use strscpy() instead of strcpy()
2024-11-05 21:35:35 +01:00
evged.c
ACPI: Switch back to struct platform_driver::remove()
2024-11-12 21:30:30 +01:00
fan_attr.c
ACPI: fan: Use ACPI handle when retrieving _FST
2025-10-24 10:29:08 +02:00
fan_core.c
ACPI: fan: Use platform device for devres-related actions
2025-10-24 10:29:29 +02:00
fan_hwmon.c
ACPI: fan: Workaround for 64-bit firmware bug
2026-01-02 12:56:39 +01:00
fan.h
ACPI: fan: Workaround for 64-bit firmware bug
2026-01-02 12:56:39 +01:00
glue.c
ACPI: Fix selecting wrong ACPI fwnode for the iGPU on some Dell laptops
2023-01-10 20:23:48 +01:00
hed.c
ACPI: HED: Always initialize before evged
2025-02-18 19:24:29 +01:00
internal.h
ACPI: PM: Add power resource init function
2025-08-25 16:25:54 +02:00
ioapic.c
ACPI: Silence missing prototype warnings
2022-12-30 19:12:30 +01:00
irq.c
ACPI: irq: Introduce acpi_get_gsi_dispatcher()
2025-05-23 16:30:55 +00:00
Kconfig
Merge tag 'riscv-for-linus-6.18-mw2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
2025-10-04 10:36:22 -07:00
Makefile
ACPI: MRRM: Minimal parse of ACPI MRRM table
2025-05-12 15:43:16 +02:00
mipi-disco-img.c
ACPI: bus: change the prototype for acpi_get_physical_device_location
2024-12-19 20:59:35 +01:00
nhlt.c
ACPI: NHLT: Streamline struct naming
2024-03-27 16:36:45 +01:00
nvs.c
…
osi.c
ACPI: OSI: Stop advertising support for "3.0 _SCP Extensions"
2025-05-16 15:53:26 +02:00
osl.c
ACPI: OSL: Use usleep_range() in acpi_os_sleep()
2024-12-10 19:45:27 +01:00
pci_irq.c
ACPI: Use str_low_high() helper in two places
2025-08-25 20:25:53 +02:00
pci_link.c
ACPI/PCI: Remove space before newline
2025-07-22 11:52:47 +02:00
pci_mcfg.c
PCI/ACPI: Increase Loongson max PCI hosts to 8
2024-08-01 18:04:05 -05:00
pci_root.c
ACPI: PCI: Constify fwnode_handle in acpi_pci_root_remap_iospace()
2025-05-09 20:47:26 +02:00
pci_slot.c
ACPI: use %pe for better readability of errors while printing
2024-02-16 19:31:12 +01:00
pfr_telemetry.c
Merge branch 'acpi-misc'
2024-11-15 20:52:02 +01:00
pfr_update.c
ACPI: pfr_update: Fix the driver update version check
2025-08-20 15:30:36 +02:00
platform_profile.c
ACPI: platform_profile: Avoid initializing on non-ACPI platforms
2025-05-23 16:44:52 +02:00
power.c
ACPI: PM: Add HP EliteBook 855 G7 WWAN modem power resource quirk
2025-08-25 16:25:54 +02:00
pptt.c
ACPI: PPTT: Fix processor subtable walk
2025-05-08 20:23:16 +02:00
prmt.c
ACPI: PRM: Skip handlers with NULL handler_address or NULL VA
2025-09-04 16:21:41 +02:00
proc.c
ACPI: proc: Prefer to use octal permission
2025-06-26 21:08:13 +02:00
processor_core.c
ACPI: processor_core: fix map_x2apic_id for amd-pstate on am4
2025-12-18 14:03:22 +01:00
processor_driver.c
Revert "ACPI: processor: Update cpuidle driver check in __acpi_processor_start()"
2025-11-27 20:52:55 +01:00
processor_idle.c
Revert "ACPI: processor: idle: Optimize ACPI idle driver registration"
2025-11-25 16:08:06 +01:00
processor_pdc.c
ACPI: processor: Fix uninitialized access of buf in acpi_set_pdc_bits()
2023-09-18 12:16:16 +02:00
processor_perflib.c
ACPI: processor: perflib: Move problematic pr->performance check
2025-08-12 15:33:58 +02:00
processor_thermal.c
ACPI: processor: thermal: Release policy references using __free()
2025-09-08 19:53:32 +02:00
processor_throttling.c
ACPI: processor: throttling: Remove space before newline
2025-07-21 16:45:40 +02:00
property.c
ACPI: property: Use ACPI functions in acpi_graph_get_next_endpoint() only
2026-01-02 12:56:39 +01:00
reboot.c
…
resource.c
Merge branches 'acpi-apei', 'acpi-misc' and 'pnp'
2025-09-29 15:28:51 +02:00
sbs.c
ACPI: SBS: Fix present test in acpi_battery_read()
2025-11-03 17:29:52 +01:00
sbshc.c
Merge branch 'acpi-misc'
2024-11-15 20:52:02 +01:00
sbshc.h
…
scan.c
Merge tag 'riscv-for-linus-6.18-mw2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
2025-10-04 10:36:22 -07:00
sleep.c
ACPI: PM: Quirk ASUS ROG M16 to default to S3 sleep
2024-09-10 20:19:52 +02:00
sleep.h
ACPI: s2idle: Add a new ->check() callback for platform_s2idle_ops
2022-09-09 17:37:40 +02:00
spcr.c
ACPI: SPCR: Check for table version when using precise baudrate
2025-10-27 20:43:41 +01:00
sysfs.c
sysfs: treewide: switch back to bin_attribute::read()/write()
2025-06-17 10:44:13 +02:00
tables.c
ACPICA: Add SoundWire File Table (SWFT) signature
2025-08-25 16:44:36 +02:00
thermal_lib.c
module: Convert symbol namespace to string literal
2024-12-02 11:34:44 -08:00
thermal.c
ACPI: thermal: Get rid of a dummy local variable
2025-09-04 20:22:33 +02:00
tiny-power-button.c
ACPI: tiny-power-button: Eliminate the driver notify callback
2023-06-16 19:48:09 +02:00
utils.c
ACPI: bus: change the prototype for acpi_get_physical_device_location
2024-12-19 20:59:35 +01:00
video_detect.c
ACPI: video: force native for Lenovo 82K8
2025-08-25 20:00:17 +02:00
viot.c
ACPI: VIOT: Remove (explicitly) unused header
2025-05-12 15:43:16 +02:00
wakeup.c
ACPI: wakeup: Drop unneeded casting for sleep_state
2025-06-26 21:08:13 +02:00