Pengjie Zhang ed781eaa9e 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>

2026-01-08 10:14:07 +01:00

..

acpica

ACPICA: Avoid walking the Namespace if start_node is NULL

2026-01-08 10:13:55 +01:00

apei

efi/cper: align ARM CPER type with UEFI 2.9A/2.10 specs

2025-12-18 13:55:21 +01:00

arm64

ACPI/IORT: Fix memory leak in iort_rmr_alloc_sids()

2025-09-09 18:58:14 +02:00

dptf

…

nfit

ACPI: NFIT: Fix incorrect ndr_desc being reportedin dev_err message

2025-10-15 12:00:12 +02:00

numa

acpi/hmat: Fix lockdep warning for hmem_register_resource()

2025-11-24 10:35:55 +01:00

pmic

ACPI: PMIC: Remove unneeded check in tps68470_pmic_opregion_probe()

2024-08-02 17:05:08 +02:00

riscv

ACPI: RISC-V: Fix FFH_CPPC_CSR error handling

2025-09-09 18:58:26 +02:00

x86

ACPI: x86: Extend Lenovo Yoga Tab 3 quirk with skip GPIO event-handlers

2025-04-10 14:39:37 +02:00

ac.c

ACPI: AC: Use strscpy() instead of strcpy()

2024-08-26 19:11:58 +02:00

acpi_adxl.c

…

acpi_apd.c

ACPI: APD: Add AMDI0015 as platform device

2024-08-20 16:34:47 +02:00

acpi_configfs.c

…

acpi_dbg.c

ACPI: debug: fix signedness issues in read/write helpers

2025-10-19 16:33:44 +02:00

acpi_extlog.c

…

acpi_ffh.c

…

acpi_fpdt.c

…

acpi_ipmi.c

…

acpi_lpat.c

…

acpi_lpit.c

…

acpi_memhotplug.c

…

acpi_pad.c

Merge branches 'acpi-video', 'acpi-resource', 'acpi-pad' and 'acpi-misc'

2024-09-11 22:05:16 +02:00

acpi_pcc.c

ACPI: PCC: Fix race condition by removing static qualifier

2026-01-08 10:14:07 +01:00

acpi_platform.c

…

acpi_pnp.c

ACPI: PNP: Add Intel OC Watchdog IDs to non-PNP device list

2025-05-29 11:02:04 +02:00

acpi_processor.c

ACPI: processor: fix acpi_object initialization

2025-08-20 18:30:25 +02:00

acpi_tad.c

ACPI: TAD: Add missing sysfs_remove_group() for ACPI_TAD_RT

2025-10-19 16:33:44 +02:00

acpi_video.c

ACPI: video: Fix use-after-free in acpi_video_switch_brightness()

2025-11-13 15:33:55 -05:00

acpi_watchdog.c

…

battery.c

ACPI: battery: Add synchronization between interface updates

2025-10-19 16:34:04 +02:00

bgrt.c

…

bus.c

ACPI: bus: Bail out if acpi_kobj registration fails

2025-06-27 11:11:27 +01:00

button.c

ACPI: button: Call input_free_device() on failing input device registration

2025-11-13 15:33:55 -05:00

container.c

…

cppc_acpi.c

ACPI: CPPC: Fix missing PCC check for guaranteed_perf

2026-01-08 10:14:07 +01:00

debugfs.c

…

device_pm.c

…

device_sysfs.c

ACPI: sysfs: Use ACPI_FREE() for freeing an ACPI object

2025-11-13 15:34:03 -05:00

dock.c

…

ec_sys.c

…

ec.c

ACPI: EC: Add device to acpi_ec_no_wakeup[] qurik list

2025-09-04 15:31:44 +02:00

event.c

…

evged.c

…

fan_attr.c

ACPI: fan: Add fan speed reporting for fans with only _FST

2025-11-13 15:34:00 -05:00

fan_core.c

ACPI: fan: Use platform device for devres-related actions

2025-11-13 15:34:01 -05:00

fan_hwmon.c

ACPI: fan: Workaround for 64-bit firmware bug

2026-01-08 10:13:56 +01:00

fan.h

ACPI: fan: Workaround for 64-bit firmware bug

2026-01-08 10:13:56 +01:00

glue.c

…

hed.c

ACPI: HED: Always initialize before evged

2025-05-29 11:02:46 +02:00

internal.h

Merge branches 'acpi-ec', 'acpi-sysfs', 'acpi-utils' and 'acpi-soc'

2024-09-11 21:45:36 +02:00

ioapic.c

…

irq.c

…

Kconfig

ACPI: HED: Always initialize before evged

2025-05-29 11:02:46 +02:00

Makefile

…

mipi-disco-img.c

…

nhlt.c

…

nvs.c

…

osi.c

ACPI: OSI: Stop advertising support for "3.0 _SCP Extensions"

2025-06-19 15:31:33 +02:00

osl.c

…

pci_irq.c

xen/pvh: Setup gsi for passthrough device

2024-09-25 09:54:52 +02:00

pci_link.c

ACPI: pci_link: Clear the dependencies after probe

2024-08-27 15:48:35 +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

…

pci_slot.c

…

pfr_telemetry.c

…

pfr_update.c

ACPI: pfr_update: Fix the driver update version check

2025-08-28 16:31:03 +02:00

platform_profile.c

ACPI: platform-profile: Fix CFI violation when accessing sysfs files

2025-04-20 10:16:00 +02:00

power.c

…

pptt.c

ACPI: PPTT: Fix processor subtable walk

2025-05-22 14:29:46 +02:00

prmt.c

ACPI: PRM: Skip handlers with NULL handler_address or NULL VA

2025-11-13 15:34:03 -05:00

proc.c

…

processor_core.c

ACPI: processor_core: fix map_x2apic_id for amd-pstate on am4

2025-12-18 13:55:09 +01:00

processor_driver.c

ACPI: processor: Move arch_init_invariance_cppc() call later

2024-11-06 21:31:36 +01:00

processor_idle.c

ACPI: processor: idle: Fix memory leak when register cpuidle device failed

2025-10-15 11:59:57 +02:00

processor_pdc.c

…

processor_perflib.c

ACPI: processor: perflib: Move problematic pr->performance check

2025-08-20 18:30:16 +02:00

processor_thermal.c

…

processor_throttling.c

…

property.c

ACPI: property: Use ACPI functions in acpi_graph_get_next_endpoint() only

2026-01-08 10:13:55 +01:00

reboot.c

…

resource.c

ACPI: resource: Skip IRQ override on ASUS Vivobook Pro N6506CU

2025-11-13 15:34:04 -05:00

sbs.c

…

sbshc.c

…

sbshc.h

…

scan.c

ACPI: scan: Update honor list for RPMI System MSI

2025-11-13 15:34:30 -05:00

sleep.c

ACPI: PM: Quirk ASUS ROG M16 to default to S3 sleep

2024-09-10 20:19:52 +02:00

sleep.h

…

spcr.c

ACPI: SPCR: Check for table version when using precise baudrate

2025-11-13 15:34:41 -05:00

sysfs.c

…

tables.c

…

thermal_lib.c

…

thermal.c

ACPI: thermal: Execute _SCP before reading trip points

2025-07-10 16:04:58 +02:00

tiny-power-button.c

…

utils.c

ACPI: utils: Add rev/func to message when acpi_evaluate_dsm() fails

2024-08-29 13:34:09 +02:00

video_detect.c

ACPI: video: force native for Lenovo 82K8

2025-11-13 15:34:03 -05:00

viot.c

…

wakeup.c

…