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Power management fixes for 5.6-rc4

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Fix a recent cpufreq initialization regression (Rafael Wysocki),
 revert a devfreq commit that made incompatible changes and broke
 user land on some systems (Orson Zhai), drop a stale reference to
 a document that has gone away recently (Jonathan Neuschäfer) and
 fix a typo in a hibernation code comment (Alexandre Belloni).
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Merge tag 'pm-5.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki:
 "Fix a recent cpufreq initialization regression (Rafael Wysocki),
  revert a devfreq commit that made incompatible changes and broke user
  land on some systems (Orson Zhai), drop a stale reference to a
  document that has gone away recently (Jonathan Neuschäfer), and fix a
  typo in a hibernation code comment (Alexandre Belloni)"

* tag 'pm-5.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  cpufreq: Fix policy initialization for internal governor drivers
  Revert "PM / devfreq: Modify the device name as devfreq(X) for sysfs"
  PM / hibernate: fix typo "reserverd_size" -> "reserved_size"
  Documentation: power: Drop reference to interface.rst
This commit is contained in:
Linus Torvalds 2020-02-28 08:49:52 -08:00
commit 3642859812
4 changed files with 12 additions and 7 deletions
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1
Documentation/power/index.rst
View File

@ -13,7 +13,6 @@ Power Management
drivers-testing
energy-model
freezing-of-tasks
interface
opp
pci
pm_qos_interface

12
drivers/cpufreq/cpufreq.c
View File

@ -1076,9 +1076,17 @@ static int cpufreq_init_policy(struct cpufreq_policy *policy)
pol = policy->last_policy;
} else if (def_gov) {
pol = cpufreq_parse_policy(def_gov->name);
} else {
return -ENODATA;
/*
* In case the default governor is neiter "performance"
* nor "powersave", fall back to the initial policy
* value set by the driver.
*/
if (pol == CPUFREQ_POLICY_UNKNOWN)
pol = policy->policy;
}
if (pol != CPUFREQ_POLICY_PERFORMANCE &&
pol != CPUFREQ_POLICY_POWERSAVE)
return -ENODATA;
}
return cpufreq_set_policy(policy, gov, pol);

4
drivers/devfreq/devfreq.c
View File

@ -738,7 +738,6 @@ struct devfreq *devfreq_add_device(struct device *dev,
{
struct devfreq *devfreq;
struct devfreq_governor *governor;
static atomic_t devfreq_no = ATOMIC_INIT(-1);
int err = 0;
if (!dev || !profile || !governor_name) {
@ -800,8 +799,7 @@ struct devfreq *devfreq_add_device(struct device *dev,
devfreq->suspend_freq = dev_pm_opp_get_suspend_opp_freq(dev);
atomic_set(&devfreq->suspend_count, 0);
dev_set_name(&devfreq->dev, "devfreq%d",
atomic_inc_return(&devfreq_no));
dev_set_name(&devfreq->dev, "%s", dev_name(dev));
err = device_register(&devfreq->dev);
if (err) {
mutex_unlock(&devfreq->lock);

2
kernel/power/snapshot.c
View File

@ -1681,7 +1681,7 @@ static unsigned long minimum_image_size(unsigned long saveable)
* hibernation for allocations made while saving the image and for device
* drivers, in case they need to allocate memory from their hibernation
* callbacks (these two numbers are given by PAGES_FOR_IO (which is a rough
* estimate) and reserverd_size divided by PAGE_SIZE (which is tunable through
* estimate) and reserved_size divided by PAGE_SIZE (which is tunable through
* /sys/power/reserved_size, respectively). To make this happen, we compute the
* total number of available page frames and allocate at least
*