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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2017-07-20 04:38:07 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2017-07-22 03:33:03 +0300 |
| commit | 8915aa2042f85ecf86d4a202ef6d04bf06f05cca (patch) | |
| tree | 85458428f75e7cdbcf0271614a0aec29ed3fd850 /kernel/power | |
| parent | 8d8b2441db9647890251538f60b75a4e45fdef8d (diff) | |
| download | linux-8915aa2042f85ecf86d4a202ef6d04bf06f05cca.tar.xz | |
PM / sleep: Mark suspend/hibernation start and finish
Regardless of whether or not debug messages from the core system
suspend/hibernation code are enabled, it is useful to know when
system-wide transitions start and finish (or fail), so print "info"
messages at these points.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Mark Salyzyn <salyzyn@android.com>
Diffstat (limited to 'kernel/power')
| -rw-r--r-- | kernel/power/hibernate.c | 5 | ||||
| -rw-r--r-- | kernel/power/suspend.c | 2 |
2 files changed, 7 insertions, 0 deletions
diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c index e19ee179d211..a5c36e9c56a6 100644 --- a/kernel/power/hibernate.c +++ b/kernel/power/hibernate.c @@ -692,6 +692,7 @@ int hibernate(void) goto Unlock; } + pr_info("hibernation entry\n"); pm_prepare_console(); error = __pm_notifier_call_chain(PM_HIBERNATION_PREPARE, -1, &nr_calls); if (error) { @@ -762,6 +763,8 @@ int hibernate(void) atomic_inc(&snapshot_device_available); Unlock: unlock_system_sleep(); + pr_info("hibernation exit\n"); + return error; } @@ -868,6 +871,7 @@ static int software_resume(void) goto Unlock; } + pr_info("resume from hibernation\n"); pm_prepare_console(); error = __pm_notifier_call_chain(PM_RESTORE_PREPARE, -1, &nr_calls); if (error) { @@ -884,6 +888,7 @@ static int software_resume(void) Finish: __pm_notifier_call_chain(PM_POST_RESTORE, nr_calls, NULL); pm_restore_console(); + pr_info("resume from hibernation failed (%d)\n", error); atomic_inc(&snapshot_device_available); /* For success case, the suspend path will release the lock */ Unlock: diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c index 4f10773322fa..18cdb1596d27 100644 --- a/kernel/power/suspend.c +++ b/kernel/power/suspend.c @@ -584,6 +584,7 @@ int pm_suspend(suspend_state_t state) if (state <= PM_SUSPEND_ON || state >= PM_SUSPEND_MAX) return -EINVAL; + pr_info("PM: suspend entry (%s)\n", pm_states[state]); error = enter_state(state); if (error) { suspend_stats.fail++; @@ -591,6 +592,7 @@ int pm_suspend(suspend_state_t state) } else { suspend_stats.success++; } + pr_info("PM: suspend exit\n"); return error; } EXPORT_SYMBOL(pm_suspend); |