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Merge tag 'pm-extra-4.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

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Pull more power management updates deom Rafael Wysocki:
 "These fix two bugs introduced by recent power management updates (in
  the cpuidle menu governor and intel_pstate) and a few other issues,
  clean up things and remove unused code.

  Specifics:

   - Fix for a cpuidle menu governor problem that started to take an
     unnecessary spinlock after one of the recent updates and that did
     not play well with the RT patch (Rafael Wysocki).

   - Fix for the new intel_pstate operation mode switching feature added
     recently that did not reinitialize P-state limits properly when
     switching operation modes (Rafael Wysocki).

   - Removal of unused global notifiers from the PM QoS framework
     (Viresh Kumar).

   - Generic power domains framework update to make it handle
     asynchronous invocations of PM callbacks in the "noirq" phases of
     system suspend/hibernation correctly (Ulf Hansson).

   - Two hibernation core cleanups (Rafael Wysocki).

   - intel_idle cleanup related to the sysfs interface (Len Brown).

   - Off-by-one bug fix in the OPP (Operating Performance Points)
     framework (Andrzej Hajda).

   - OPP framework's documentation fix (Viresh Kumar).

   - cpufreq qoriq driver cleanup (Tang Yuantian).

   - Fixes for typos in comments in the device runtime PM framework
     (Christophe Jaillet)"

* tag 'pm-extra-4.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  PM / OPP: Documentation: Fix opp-microvolt in examples
  intel_idle: stop exposing platform acronyms in sysfs
  cpufreq: intel_pstate: Fix limits issue with operation mode switching
  PM / hibernate: Define pr_fmt() and use pr_*() instead of printk()
  PM / hibernate: Untangle power_down()
  cpuidle: menu: Avoid taking spinlock for accessing QoS values
  PM / QoS: Remove global notifiers
  PM / runtime: Fix some typos
  cpufreq: qoriq: clean up unused code
  PM / OPP: fix off-by-one bug in dev_pm_opp_get_max_volt_latency loop
  PM / Domains: Power off masters immediately in the power off sequence
  PM / Domains: Rename is_async to one_dev_on for genpd_power_off()
  PM / Domains: Move genpd_power_off() above genpd_power_on()
This commit is contained in:
Linus Torvalds
2017-03-02 17:33:52 -08:00
parent bbe08c0a43 9b5e9cb164
commit 080e4168c0
12 changed files with 286 additions and 362 deletions
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93
kernel/power/hibernate.c
View File

@@ -10,6 +10,8 @@
* This file is released under the GPLv2.
*/
#define pr_fmt(fmt) "PM: " fmt
#include <linux/export.h>
#include <linux/suspend.h>
#include <linux/syscalls.h>
@@ -104,7 +106,7 @@ EXPORT_SYMBOL(system_entering_hibernation);
#ifdef CONFIG_PM_DEBUG
static void hibernation_debug_sleep(void)
{
printk(KERN_INFO "hibernation debug: Waiting for 5 seconds.\n");
pr_info("hibernation debug: Waiting for 5 seconds.\n");
mdelay(5000);
}
@@ -250,10 +252,9 @@ void swsusp_show_speed(ktime_t start, ktime_t stop,
centisecs = 1; /* avoid div-by-zero */
k = nr_pages * (PAGE_SIZE / 1024);
kps = (k * 100) / centisecs;
printk(KERN_INFO "PM: %s %u kbytes in %u.%02u seconds (%u.%02u MB/s)\n",
msg, k,
centisecs / 100, centisecs % 100,
kps / 1000, (kps % 1000) / 10);
pr_info("%s %u kbytes in %u.%02u seconds (%u.%02u MB/s)\n",
msg, k, centisecs / 100, centisecs % 100, kps / 1000,
(kps % 1000) / 10);
}
/**
@@ -271,8 +272,7 @@ static int create_image(int platform_mode)
error = dpm_suspend_end(PMSG_FREEZE);
if (error) {
printk(KERN_ERR "PM: Some devices failed to power down, "
"aborting hibernation\n");
pr_err("Some devices failed to power down, aborting hibernation\n");
return error;
}
@@ -288,8 +288,7 @@ static int create_image(int platform_mode)
error = syscore_suspend();
if (error) {
printk(KERN_ERR "PM: Some system devices failed to power down, "
"aborting hibernation\n");
pr_err("Some system devices failed to power down, aborting hibernation\n");
goto Enable_irqs;
}
@@ -304,8 +303,8 @@ static int create_image(int platform_mode)
restore_processor_state();
trace_suspend_resume(TPS("machine_suspend"), PM_EVENT_HIBERNATE, false);
if (error)
printk(KERN_ERR "PM: Error %d creating hibernation image\n",
error);
pr_err("Error %d creating hibernation image\n", error);
if (!in_suspend) {
events_check_enabled = false;
clear_free_pages();
@@ -432,8 +431,7 @@ static int resume_target_kernel(bool platform_mode)
error = dpm_suspend_end(PMSG_QUIESCE);
if (error) {
printk(KERN_ERR "PM: Some devices failed to power down, "
"aborting resume\n");
pr_err("Some devices failed to power down, aborting resume\n");
return error;
}
@@ -608,6 +606,22 @@ static void power_down(void)
{
#ifdef CONFIG_SUSPEND
int error;
if (hibernation_mode == HIBERNATION_SUSPEND) {
error = suspend_devices_and_enter(PM_SUSPEND_MEM);
if (error) {
hibernation_mode = hibernation_ops ?
HIBERNATION_PLATFORM :
HIBERNATION_SHUTDOWN;
} else {
/* Restore swap signature. */
error = swsusp_unmark();
if (error)
pr_err("Swap will be unusable! Try swapon -a.\n");
return;
}
}
#endif
switch (hibernation_mode) {
@@ -620,32 +634,13 @@ static void power_down(void)
if (pm_power_off)
kernel_power_off();
break;
#ifdef CONFIG_SUSPEND
case HIBERNATION_SUSPEND:
error = suspend_devices_and_enter(PM_SUSPEND_MEM);
if (error) {
if (hibernation_ops)
hibernation_mode = HIBERNATION_PLATFORM;
else
hibernation_mode = HIBERNATION_SHUTDOWN;
power_down();
}
/*
* Restore swap signature.
*/
error = swsusp_unmark();
if (error)
printk(KERN_ERR "PM: Swap will be unusable! "
"Try swapon -a.\n");
return;
#endif
}
kernel_halt();
/*
* Valid image is on the disk, if we continue we risk serious data
* corruption after resume.
*/
printk(KERN_CRIT "PM: Please power down manually\n");
pr_crit("Power down manually\n");
while (1)
cpu_relax();
}
@@ -655,7 +650,7 @@ static int load_image_and_restore(void)
int error;
unsigned int flags;
pr_debug("PM: Loading hibernation image.\n");
pr_debug("Loading hibernation image.\n");
lock_device_hotplug();
error = create_basic_memory_bitmaps();
@@ -667,7 +662,7 @@ static int load_image_and_restore(void)
if (!error)
hibernation_restore(flags & SF_PLATFORM_MODE);
printk(KERN_ERR "PM: Failed to load hibernation image, recovering.\n");
pr_err("Failed to load hibernation image, recovering.\n");
swsusp_free();
free_basic_memory_bitmaps();
Unlock:
@@ -685,7 +680,7 @@ int hibernate(void)
bool snapshot_test = false;
if (!hibernation_available()) {
pr_debug("PM: Hibernation not available.\n");
pr_debug("Hibernation not available.\n");
return -EPERM;
}
@@ -703,9 +698,9 @@ int hibernate(void)
goto Exit;
}
printk(KERN_INFO "PM: Syncing filesystems ... ");
pr_info("Syncing filesystems ... \n");
sys_sync();
printk("done.\n");
pr_info("done.\n");
error = freeze_processes();
if (error)
@@ -731,7 +726,7 @@ int hibernate(void)
else
flags |= SF_CRC32_MODE;
pr_debug("PM: writing image.\n");
pr_debug("Writing image.\n");
error = swsusp_write(flags);
swsusp_free();
if (!error) {
@@ -743,7 +738,7 @@ int hibernate(void)
in_suspend = 0;
pm_restore_gfp_mask();
} else {
pr_debug("PM: Image restored successfully.\n");
pr_debug("Image restored successfully.\n");
}
Free_bitmaps:
@@ -751,7 +746,7 @@ int hibernate(void)
Thaw:
unlock_device_hotplug();
if (snapshot_test) {
pr_debug("PM: Checking hibernation image\n");
pr_debug("Checking hibernation image\n");
error = swsusp_check();
if (!error)
error = load_image_and_restore();
@@ -815,10 +810,10 @@ static int software_resume(void)
goto Unlock;
}
pr_debug("PM: Checking hibernation image partition %s\n", resume_file);
pr_debug("Checking hibernation image partition %s\n", resume_file);
if (resume_delay) {
printk(KERN_INFO "Waiting %dsec before reading resume device...\n",
pr_info("Waiting %dsec before reading resume device ...\n",
resume_delay);
ssleep(resume_delay);
}
@@ -857,10 +852,10 @@ static int software_resume(void)
}
Check_image:
pr_debug("PM: Hibernation image partition %d:%d present\n",
pr_debug("Hibernation image partition %d:%d present\n",
MAJOR(swsusp_resume_device), MINOR(swsusp_resume_device));
pr_debug("PM: Looking for hibernation image.\n");
pr_debug("Looking for hibernation image.\n");
error = swsusp_check();
if (error)
goto Unlock;
@@ -879,7 +874,7 @@ static int software_resume(void)
goto Close_Finish;
}
pr_debug("PM: Preparing processes for restore.\n");
pr_debug("Preparing processes for restore.\n");
error = freeze_processes();
if (error)
goto Close_Finish;
@@ -892,7 +887,7 @@ static int software_resume(void)
/* For success case, the suspend path will release the lock */
Unlock:
mutex_unlock(&pm_mutex);
pr_debug("PM: Hibernation image not present or could not be loaded.\n");
pr_debug("Hibernation image not present or could not be loaded.\n");
return error;
Close_Finish:
swsusp_close(FMODE_READ);
@@ -1016,7 +1011,7 @@ static ssize_t disk_store(struct kobject *kobj, struct kobj_attribute *attr,
error = -EINVAL;
if (!error)
pr_debug("PM: Hibernation mode set to '%s'\n",
pr_debug("Hibernation mode set to '%s'\n",
hibernation_modes[mode]);
unlock_system_sleep();
return error ? error : n;
@@ -1052,7 +1047,7 @@ static ssize_t resume_store(struct kobject *kobj, struct kobj_attribute *attr,
lock_system_sleep();
swsusp_resume_device = res;
unlock_system_sleep();
printk(KERN_INFO "PM: Starting manual resume from disk\n");
pr_info("Starting manual resume from disk\n");
noresume = 0;
software_resume();
return n;