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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-07-20 03:38:07 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-07-22 02:33:03 +0200
commit8915aa2042f85ecf86d4a202ef6d04bf06f05cca (patch)
tree85458428f75e7cdbcf0271614a0aec29ed3fd850 /kernel/power
parent8d8b2441db9647890251538f60b75a4e45fdef8d (diff)
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.c5
-rw-r--r--kernel/power/suspend.c2
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);