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Power management regression fix for final 5.4 

Fix problems with switching cpufreq drivers on some x86 systems with
 ACPI (and with changing the operation modes of the intel_pstate driver
 on those systems) introduced by recent changes related to the
 management of frequency limits in cpufreq.
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Merge tag 'pm-5.4-final' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management regression fix from Rafael Wysocki:
 "Fix problems with switching cpufreq drivers on some x86 systems with
  ACPI (and with changing the operation modes of the intel_pstate driver
  on those systems) introduced by recent changes related to the
  management of frequency limits in cpufreq"

* tag 'pm-5.4-final' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  PM: QoS: Invalidate frequency QoS requests after removal
This commit is contained in:
Linus Torvalds 2019-11-22 09:18:16 -08:00
parent 5d867ab037 05ff1ba412
commit a6b0373ffc
1 changed files with 7 additions and 1 deletions
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8
kernel/power/qos.c
View File

@ -814,6 +814,8 @@ EXPORT_SYMBOL_GPL(freq_qos_update_request);
*/
int freq_qos_remove_request(struct freq_qos_request *req)
{
int ret;
if (!req)
return -EINVAL;
@ -821,7 +823,11 @@ int freq_qos_remove_request(struct freq_qos_request *req)
"%s() called for unknown object\n", __func__))
return -EINVAL;
return freq_qos_apply(req, PM_QOS_REMOVE_REQ, PM_QOS_DEFAULT_VALUE);
ret = freq_qos_apply(req, PM_QOS_REMOVE_REQ, PM_QOS_DEFAULT_VALUE);
req->qos = NULL;
req->type = 0;
return ret;
}
EXPORT_SYMBOL_GPL(freq_qos_remove_request);