kernel/linux
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ synced 2026-10-18 19:12:56 +00:00
Code Issues Releases Packages Activity
linux/drivers/cpufreq
History
Viresh Kumar 3d4facdf09 cpufreq: conservative: Reset requested_freq on limits change 
commit 6a28fb8cb2 upstream.

A recently reported issue highlighted that the cached requested_freq
is not guaranteed to stay in sync with policy->cur. If the platform
changes the actual CPU frequency after the governor sets one (e.g.
due to platform-specific frequency scaling) and a re-sync occurs
later, policy->cur may diverge from requested_freq.

This can lead to incorrect behavior in the conservative governor.
For example, the governor may assume the CPU is already running at
the maximum frequency and skip further increases even though there
is still headroom.

Avoid this by resetting the cached requested_freq to policy->cur on
detecting a change in policy limits.

Reported-by: Lifeng Zheng <zhenglifeng1@huawei.com>
Tested-by: Lifeng Zheng <zhenglifeng1@huawei.com>
Link: https://lore.kernel.org/all/20260210115458.3493646-1-zhenglifeng1@huawei.com/
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Zhongqiu Han <zhongqiu.han@oss.qualcomm.com>
Cc: All applicable <stable@vger.kernel.org>
Link: https://patch.msgid.link/d846a141a98ac0482f20560fcd7525c0f0ec2f30.1773999467.git.viresh.kumar@linaro.org
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2026-04-18 10:33:27 +02:00
..
acpi-cpufreq.c acpi-cpufreq: Fix nominal_freq units to KHz in get_max_boost_ratio() 2025-06-27 11:05:09 +01:00
amd_freq_sensitivity.c cpufreq: amd_freq_sensitivity: Add missing pci_dev_put() 2022-12-31 13:14:03 +01:00
armada-8k-cpufreq.c cpufreq: armada-8k: Fix off by one in armada_8k_cpufreq_free_table() 2025-08-28 16:24:27 +02:00
armada-37xx-cpufreq.c cpufreq: Explicitly include correct DT includes 2024-03-26 18:21:16 -04:00
bmips-cpufreq.c cpufreq: Make cpufreq_generic_init() return void 2019-07-16 10:20:11 +02:00
brcmstb-avs-cpufreq.c cpufreq: brcmstb-avs-cpufreq: fix up "add check for cpufreq_cpu_get's return value" 2024-04-10 16:18:44 +02:00
cppc_cpufreq.c cpufreq: CPPC: Avoid using CPUFREQ_ETERNAL as transition delay 2025-10-29 14:03:07 +01:00
cpufreq-dt-platdev.c cpufreq: Use of_property_present() for testing DT property presence 2024-01-25 14:52:33 -08:00
cpufreq-dt.c cpufreq: dt: always allocate zeroed cpumask 2024-04-10 16:18:43 +02:00
cpufreq-dt.h cpufreq: dt: Allow platform specific intermediate callbacks 2020-03-12 15:43:52 +05:30
cpufreq-nforce2.c cpufreq: nforce2: fix reference count leak in nforce2 2026-01-19 13:09:51 +01:00
cpufreq.c cpufreq: Initialize cpufreq-based invariance before subsys 2025-10-02 13:39:10 +02:00
cpufreq_conservative.c cpufreq: conservative: Reset requested_freq on limits change 2026-04-18 10:33:27 +02:00
cpufreq_governor.c cpufreq: conservative: Reset requested_freq on limits change 2026-04-18 10:33:27 +02:00
cpufreq_governor.h cpufreq: conservative: Reset requested_freq on limits change 2026-04-18 10:33:27 +02:00
cpufreq_governor_attr_set.c cpufreq: Move to_gov_attr_set() to cpufreq.h 2023-02-01 08:27:29 +01:00
cpufreq_ondemand.c cpufreq: Replace deprecated CPU-hotplug functions 2021-08-04 20:16:32 +02:00
cpufreq_ondemand.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
cpufreq_performance.c cpufreq: Introduce CPUFREQ_GOV_STRICT_TARGET 2020-11-10 18:31:17 +01:00
cpufreq_powersave.c cpufreq: Introduce CPUFREQ_GOV_STRICT_TARGET 2020-11-10 18:31:17 +01:00
cpufreq_stats.c cpufreq: stats: Fix buffer overflow detection in trans_stats() 2023-11-28 16:56:32 +00:00
cpufreq_userspace.c cpufreq: Register governors at core_initcall 2020-07-02 13:03:30 +02:00
davinci-cpufreq.c cpufreq: Remove CPUFREQ_STICKY flag 2021-02-04 19:23:20 +01:00
e_powersaver.c cpufreq: e_powersaver: remove unreachable break 2020-10-27 18:42:54 +01:00
elanfreq.c cpufreq: Convert to new X86 CPU match macros 2020-03-24 21:31:27 +01:00
freq_table.c cpufreq: Fix scaling_{available,boost}_frequencies_show() comments 2021-03-26 17:43:48 +01:00
gx-suspmod.c cpufreq: Avoid creating excessively large stack frames 2020-01-27 10:33:33 +01:00
highbank-cpufreq.c cpufreq: highbank: Add missing MODULE_DEVICE_TABLE 2020-12-07 13:02:37 +05:30
ia64-acpi-cpufreq.c ia64: fix format string for ia64-acpi-cpu-freq 2021-03-19 17:26:20 +01:00
imx-cpufreq-dt.c cpufreq: Use of_property_present() for testing DT property presence 2024-01-25 14:52:33 -08:00
imx6q-cpufreq.c cpufreq: Use of_property_present() for testing DT property presence 2024-01-25 14:52:33 -08:00
intel_pstate.c cpufreq: intel_pstate: Fix object lifecycle issue in update_qos_request() 2025-10-19 16:21:44 +02:00
Kconfig cpufreq: Kconfig: fix documentation links 2021-04-21 19:00:42 +02:00
Kconfig.arm cpufreq: mediatek-hw: Add support for CPUFREQ HW 2021-09-06 15:15:19 +05:30
Kconfig.powerpc cpufreq: Fix Kconfig indentation 2019-11-29 11:52:02 +01:00
Kconfig.x86 cpufreq: sfi-cpufreq: Remove driver for deprecated firmware 2021-02-15 20:04:46 +01:00
kirkwood-cpufreq.c cpufreq: kirkwood: convert to devm_platform_ioremap_resource 2020-01-07 13:29:58 +05:30
longhaul.c cpufreq/longhaul: handle NULL policy in longhaul_exit 2025-12-07 06:09:16 +09:00
longhaul.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 166 2019-05-30 11:26:39 -07:00
longrun.c cpufreq: Convert to new X86 CPU match macros 2020-03-24 21:31:27 +01:00
loongson1-cpufreq.c cpufreq: Remove CPUFREQ_STICKY flag 2021-02-04 19:23:20 +01:00
loongson2_cpufreq.c cpufreq: loongson2: Unregister platform_driver on failure 2024-12-14 19:51:01 +01:00
Makefile cpufreq: mediatek-hw: Add support for CPUFREQ HW 2021-09-06 15:15:19 +05:30
maple-cpufreq.c Merge branch 'pm-cpufreq' 2019-07-18 09:49:30 +02:00
mediatek-cpufreq-hw.c cpufreq: mediatek-hw: Fix wrong return value in mtk_cpufreq_get_cpu_power() 2024-12-14 19:51:15 +01:00
mediatek-cpufreq.c cpufreq: mediatek: Unregister platform device on exit 2022-06-09 10:23:14 +02:00
mvebu-cpufreq.c cpufreq: mvebu: Remove OPPs using dev_pm_opp_remove() 2018-09-19 14:56:44 -07:00
omap-cpufreq.c cpufreq: omap: Use .register_em() to register with energy model 2021-08-12 09:54:07 +05:30
p4-clockmod.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
pasemi-cpufreq.c cpufreq: pasemi: Include header file for {check,restore}_astate prototypes 2020-07-15 15:17:06 +02:00
pcc-cpufreq.c cpufreq: pcc-cpufreq: Mark sometimes used ID structs as __maybe_unused 2020-07-15 15:17:06 +02:00
pmac32-cpufreq.c cpufreq: pmac32-cpufreq: Fix refcount leak bug 2022-07-21 21:24:34 +02:00
pmac64-cpufreq.c Merge branch 'pm-cpufreq' 2019-07-18 09:49:30 +02:00
powernow-k6.c cpufreq: Convert to new X86 CPU match macros 2020-03-24 21:31:27 +01:00
powernow-k7.c cpufreq: Convert to new X86 CPU match macros 2020-03-24 21:31:27 +01:00
powernow-k7.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 166 2019-05-30 11:26:39 -07:00
powernow-k8.c cpufreq: powernow-k8: Use related_cpus instead of cpus in driver.exit() 2023-09-19 12:22:32 +02:00
powernow-k8.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 347 2019-06-05 17:37:08 +02:00
powernv-cpufreq.c powerpc updates for 5.15 2021-09-03 11:22:50 -07:00
ppc_cbe_cpufreq.c cpufreq: Explicitly include correct DT includes 2024-03-26 18:21:16 -04:00
ppc_cbe_cpufreq.h cpufreq: powerpc_cbe: Switch to QoS requests for freq limits 2019-08-26 10:02:01 +02:00
ppc_cbe_cpufreq_pervasive.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 153 2019-05-30 11:26:32 -07:00
ppc_cbe_cpufreq_pmi.c cpufreq: Explicitly include correct DT includes 2024-03-26 18:21:16 -04:00
pxa2xx-cpufreq.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
pxa3xx-cpufreq.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
qcom-cpufreq-hw.c cpufreq: qcom-hw: Fix memory leak in qcom_cpufreq_hw_read_lut() 2022-12-31 13:14:01 +01:00
qcom-cpufreq-nvmem.c cpufreq: Explicitly include correct DT includes 2024-03-26 18:21:16 -04:00
qoriq-cpufreq.c drivers: cpufreq: Add missing of_node_put() in qoriq-cpufreq.c 2022-07-07 17:53:33 +02:00
raspberrypi-cpufreq.c cpufreq: add driver for Raspberry Pi 2019-06-13 08:58:22 +05:30
s3c24xx-cpufreq-debugfs.c ARM: s3c: remove cpufreq header dependencies 2020-08-20 17:52:05 +02:00
s3c24xx-cpufreq.c cpufreq: Remove CPUFREQ_STICKY flag 2021-02-04 19:23:20 +01:00
s3c64xx-cpufreq.c cpufreq: s3c64xx: Fix compilation warning 2025-03-13 12:50:23 +01:00
s3c2410-cpufreq.c cpufreq: s3c24xx: move low-level clk reg access into platform code 2020-08-20 17:53:22 +02:00
s3c2412-cpufreq.c cpufreq: s3c24xx: move low-level clk reg access into platform code 2020-08-20 17:53:22 +02:00
s3c2416-cpufreq.c cpufreq: s3c: fix unbalances of cpufreq policy refcount 2020-01-07 13:31:01 +05:30
s3c2440-cpufreq.c cpufreq: s3c24xx: move low-level clk reg access into platform code 2020-08-20 17:53:22 +02:00
s5pv210-cpufreq.c cpufreq: s5pv210: fix refcount leak 2026-01-19 13:09:42 +01:00
sa1100-cpufreq.c cpufreq: Remove CPUFREQ_STICKY flag 2021-02-04 19:23:20 +01:00
sa1110-cpufreq.c cpufreq: Remove CPUFREQ_STICKY flag 2021-02-04 19:23:20 +01:00
sc520_freq.c cpufreq: sc520_freq: add 'fallthrough' to one case 2021-05-21 18:52:13 +02:00
scmi-cpufreq.c cpufreq: scmi: Account for malformed DT in scmi_dev_used_by_cpus() 2025-10-19 16:21:29 +02:00
scpi-cpufreq.c cpufreq: scpi: Fix null-ptr-deref in scpi_cpufreq_get_rate() 2025-05-02 07:44:29 +02:00
sh-cpufreq.c cpufreq: sh: Remove sh_cpufreq_cpu_ready() 2021-09-02 18:04:17 +02:00
sparc-us2e-cpufreq.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
sparc-us3-cpufreq.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
spear-cpufreq.c cpufreq: Remove CPUFREQ_STICKY flag 2021-02-04 19:23:20 +01:00
speedstep-centrino.c cpufreq: Convert to new X86 CPU match macros 2020-03-24 21:31:27 +01:00
speedstep-ich.c cpufreq: Convert to new X86 CPU match macros 2020-03-24 21:31:27 +01:00
speedstep-lib.c cpufreq: speedstep: remove unneeded semicolon 2020-10-28 18:04:07 +01:00
speedstep-lib.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 166 2019-05-30 11:26:39 -07:00
speedstep-smi.c cpufreq: Convert to new X86 CPU match macros 2020-03-24 21:31:27 +01:00
sti-cpufreq.c cpufreq: Explicitly include correct DT includes 2024-03-26 18:21:16 -04:00
sun50i-cpufreq-nvmem.c cpufreq: fix memory leak in sun50i_cpufreq_nvmem_probe 2022-05-09 09:14:36 +02:00
tegra20-cpufreq.c cpufreq: Use of_property_present() for testing DT property presence 2024-01-25 14:52:33 -08:00
tegra124-cpufreq.c cpufreq: tegra124: Add suspend and resume support 2019-10-29 13:25:29 +01:00
tegra186-cpufreq.c cpufreq: tegra186: Initialize all cores to max frequencies 2025-12-07 06:09:25 +09:00
tegra194-cpufreq.c cpufreq: Remove CPUFREQ_STICKY flag 2021-02-04 19:23:20 +01:00
ti-cpufreq.c cpufreq: ti-cpufreq: Introduce quirks to handle syscon fails appropriately 2024-10-17 15:10:45 +02:00
vexpress-spc-cpufreq.c cpufreq: Explicitly include correct DT includes 2024-03-26 18:21:16 -04:00