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author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-03-02 17:33:52 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-03-02 17:33:52 -0800 |
commit | 080e4168c0834ccc853c48259e16a5c556c7ecba (patch) | |
tree | 641a264718c6f1b8bf9525e4e4a073565044cd03 /kernel/power/hibernate.c | |
parent | bbe08c0a43e2c5ee3a00de68c0e867a08a9aa990 (diff) | |
parent | 9b5e9cb164ee93ae19c4c6593e8188a55481f78b (diff) | |
download | op-kernel-dev-080e4168c0834ccc853c48259e16a5c556c7ecba.zip op-kernel-dev-080e4168c0834ccc853c48259e16a5c556c7ecba.tar.gz |
Merge tag 'pm-extra-4.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
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()
Diffstat (limited to 'kernel/power/hibernate.c')
-rw-r--r-- | kernel/power/hibernate.c | 93 |
1 files changed, 44 insertions, 49 deletions
diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c index 86385af..9e1cba0 100644 --- a/kernel/power/hibernate.c +++ b/kernel/power/hibernate.c @@ -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; |