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Power management fixes for final 7.1

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- Restore allowing writing EPP of 0 when in performance mode in the
    amd-pstate driver which was unnecessarily disallowed by one of the
    recent updates (Mario Limonciello)
 
  - Remove stale documentation of the epp_cached field in struct
    amd_cpudata that has been dropped recently (Zhan Xusheng)
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Merge tag 'pm-7.1-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki:
 "These address some remaining fallout after introducing dynamic EPP
  support in the amd-pstate driver during the current development cycle:

   - Restore allowing writing EPP of 0 when in performance mode in the
     amd-pstate driver which was unnecessarily disallowed by one of the
     recent updates (Mario Limonciello)

   - Remove stale documentation of the epp_cached field in struct
     amd_cpudata that has been dropped recently (Zhan Xusheng)"

* tag 'pm-7.1-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  cpufreq/amd-pstate: Fix setting EPP in performance mode
  cpufreq/amd-pstate: drop stale @epp_cached kdoc
This commit is contained in:
Linus Torvalds 2026-06-10 11:53:55 -07:00
commit 9716c086c8
2 changed files with 1 additions and 2 deletions
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2
drivers/cpufreq/amd-pstate.c
View File

@ -1428,7 +1428,7 @@ ssize_t store_energy_performance_preference(struct cpufreq_policy *policy,
epp = cpudata->epp_default_dc;
}
if (cpudata->policy == CPUFREQ_POLICY_PERFORMANCE) {
if (epp > 0 && cpudata->policy == CPUFREQ_POLICY_PERFORMANCE) {
pr_debug("EPP cannot be set under performance policy\n");
return -EBUSY;
}

1
drivers/cpufreq/amd-pstate.h
View File

@ -84,7 +84,6 @@ struct amd_aperf_mperf {
* @hw_prefcore: check whether HW supports preferred core featue.
* Only when hw_prefcore and early prefcore param are true,
* AMD P-State driver supports preferred core featue.
* @epp_cached: Cached CPPC energy-performance preference value
* @policy: Cpufreq policy value
* @suspended: If CPU core if offlined
* @epp_default_ac: Default EPP value for AC power source