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Power management fix for 5.4-rc7 

Fix an "unchecked MSR access" warning in the intel_pstate cpufreq
 driver (Srinivas Pandruvada).
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Merge tag 'pm-5.4-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management fix from Rafael Wysocki:
 "Fix an 'unchecked MSR access' warning in the intel_pstate cpufreq
  driver (Srinivas Pandruvada)"

* tag 'pm-5.4-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  cpufreq: intel_pstate: Fix invalid EPB setting
This commit is contained in:
Linus Torvalds 2019-11-08 08:33:32 -08:00
parent 8ac2a114b1 c31432fa7f
commit 4d8b3262af
1 changed files with 1 additions and 3 deletions
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4
drivers/cpufreq/intel_pstate.c
View File

@ -847,11 +847,9 @@ static void intel_pstate_hwp_force_min_perf(int cpu)
value |= HWP_MAX_PERF(min_perf);
value |= HWP_MIN_PERF(min_perf);
/* Set EPP/EPB to min */
/* Set EPP to min */
if (boot_cpu_has(X86_FEATURE_HWP_EPP))
value |= HWP_ENERGY_PERF_PREFERENCE(HWP_EPP_POWERSAVE);
else
intel_pstate_set_epb(cpu, HWP_EPP_BALANCE_POWERSAVE);
wrmsrl_on_cpu(cpu, MSR_HWP_REQUEST, value);
}