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Power management fixes for 5.7-rc4

Browse source 
Prevent the intel_pstate driver from printing excessive diagnostic
 messages in some cases (Chris Wilson), make the hibernation restore
 kernel freeze kernel threads as well as user space tasks (Dexuan Cui)
 and fix the ACPI device PM disagnostic messages to include the correct
 power state name (Kai-Heng Feng).
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Merge tag 'pm-5.7-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki:

 - prevent the intel_pstate driver from printing excessive diagnostic
   messages in some cases (Chris Wilson)

 - make the hibernation restore kernel freeze kernel threads as well as
   user space tasks (Dexuan Cui)

 - fix the ACPI device PM disagnostic messages to include the correct
   power state name (Kai-Heng Feng).

* tag 'pm-5.7-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  PM: ACPI: Output correct message on target power state
  PM: hibernate: Freeze kernel threads in software_resume()
  cpufreq: intel_pstate: Only mention the BIOS disabling turbo mode once
This commit is contained in:
Linus Torvalds 2020-05-02 13:45:30 -07:00
commit 743f05732f
3 changed files with 10 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
drivers/acpi/device_pm.c
View file

@ -273,13 +273,13 @@ int acpi_device_set_power(struct acpi_device *device, int state)
end:
if (result) {
dev_warn(&device->dev, "Failed to change power state to %s\n",
acpi_power_state_string(state));
acpi_power_state_string(target_state));
} else {
device->power.state = target_state;
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Device [%s] transitioned to %s\n",
device->pnp.bus_id,
acpi_power_state_string(state)));
acpi_power_state_string(target_state)));
}
return result;

2
drivers/cpufreq/intel_pstate.c
View file

@ -1059,7 +1059,7 @@ static ssize_t store_no_turbo(struct kobject *a, struct kobj_attribute *b,
update_turbo_state();
if (global.turbo_disabled) {
pr_warn("Turbo disabled by BIOS or unavailable on processor\n");
pr_notice_once("Turbo disabled by BIOS or unavailable on processor\n");
mutex_unlock(&intel_pstate_limits_lock);
mutex_unlock(&intel_pstate_driver_lock);
return -EPERM;

7
kernel/power/hibernate.c
View file

@ -898,6 +898,13 @@ static int software_resume(void)
error = freeze_processes();
if (error)
goto Close_Finish;
error = freeze_kernel_threads();
if (error) {
thaw_processes();
goto Close_Finish;
}
error = load_image_and_restore();
thaw_processes();
Finish: