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Diffstat (limited to 'kernel/power/suspend.c')
-rw-r--r--kernel/power/suspend.c35
1 files changed, 29 insertions, 6 deletions
diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
index 15e6baef5c73..3ecf275d7e44 100644
--- a/kernel/power/suspend.c
+++ b/kernel/power/suspend.c
@@ -72,6 +72,8 @@ static void freeze_begin(void)
static void freeze_enter(void)
{
+ trace_suspend_resume(TPS("machine_suspend"), PM_SUSPEND_FREEZE, true);
+
spin_lock_irq(&suspend_freeze_lock);
if (pm_wakeup_pending())
goto out;
@@ -84,11 +86,9 @@ static void freeze_enter(void)
/* Push all the CPUs into the idle loop. */
wake_up_all_idle_cpus();
- pr_debug("PM: suspend-to-idle\n");
/* Make the current CPU wait so it can enter the idle loop too. */
wait_event(suspend_freeze_wait_head,
suspend_freeze_state == FREEZE_STATE_WAKE);
- pr_debug("PM: resume from suspend-to-idle\n");
cpuidle_pause();
put_online_cpus();
@@ -98,6 +98,31 @@ static void freeze_enter(void)
out:
suspend_freeze_state = FREEZE_STATE_NONE;
spin_unlock_irq(&suspend_freeze_lock);
+
+ trace_suspend_resume(TPS("machine_suspend"), PM_SUSPEND_FREEZE, false);
+}
+
+static void s2idle_loop(void)
+{
+ pr_debug("PM: suspend-to-idle\n");
+
+ do {
+ freeze_enter();
+
+ if (freeze_ops && freeze_ops->wake)
+ freeze_ops->wake();
+
+ dpm_resume_noirq(PMSG_RESUME);
+ if (freeze_ops && freeze_ops->sync)
+ freeze_ops->sync();
+
+ if (pm_wakeup_pending())
+ break;
+
+ pm_wakeup_clear(false);
+ } while (!dpm_suspend_noirq(PMSG_SUSPEND));
+
+ pr_debug("PM: resume from suspend-to-idle\n");
}
void freeze_wake(void)
@@ -371,10 +396,8 @@ static int suspend_enter(suspend_state_t state, bool *wakeup)
* all the devices are suspended.
*/
if (state == PM_SUSPEND_FREEZE) {
- trace_suspend_resume(TPS("machine_suspend"), state, true);
- freeze_enter();
- trace_suspend_resume(TPS("machine_suspend"), state, false);
- goto Platform_wake;
+ s2idle_loop();
+ goto Platform_early_resume;
}
error = disable_nonboot_cpus();