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Urgent power management fix for v4.14 

This fixes new breakage introduced by the most recent PM QoS
 fix in which, embarrassingly enough, I forgot to update
 dev_pm_qos_raw_read_value() to return the right default
 for devices with no PM QoS constraints at all which prevents
 runtime PM from suspending those devices (fix from Tero Kristo).
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Merge tag 'pm-urgent-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management fix from Rafael Wysocki:
 "This fixes new breakage introduced by the most recent PM QoS fix in
  which, embarrassingly enough, I forgot to update
  dev_pm_qos_raw_read_value() to return the right default for devices
  with no PM QoS constraints at all which prevents runtime PM from
  suspending those devices (fix from Tero Kristo)"

* tag 'pm-urgent-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  PM / QoS: Fix default runtime_pm device resume latency
This commit is contained in:
Linus Torvalds 2017-10-30 16:38:03 -07:00
parent b39ab98e2f 2a9a86d5c8
commit 5f479447d9
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
include/linux/pm_qos.h
View File

@ -175,7 +175,8 @@ static inline s32 dev_pm_qos_requested_flags(struct device *dev)
static inline s32 dev_pm_qos_raw_read_value(struct device *dev)
{
return IS_ERR_OR_NULL(dev->power.qos) ?
0 : pm_qos_read_value(&dev->power.qos->resume_latency);
PM_QOS_RESUME_LATENCY_NO_CONSTRAINT :
pm_qos_read_value(&dev->power.qos->resume_latency);
}
#else
static inline enum pm_qos_flags_status __dev_pm_qos_flags(struct device *dev,