Merge branch 'acpi-pm'

* acpi-pm:
  ACPI / PM: Export rest of the subsys PM callbacks
  ACPI / PM: Avoid resuming devices in ACPI PM domain during system suspend
  ACPI / PM: Hold ACPI scan lock over the "freeze" sleep state
  ACPI / PM: Export acpi_target_system_state() to modules

1 files changed, 15 insertions, 0 deletions

diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
index 338a6f147974..963e6d0f050b 100644
--- a/kernel/power/suspend.c
+++ b/kernel/power/suspend.c
@@ -38,6 +38,7 @@ struct pm_sleep_state pm_states[PM_SUSPEND_MAX] = {
 };
 
 static const struct platform_suspend_ops *suspend_ops;
+static const struct platform_freeze_ops *freeze_ops;
 
 static bool need_suspend_ops(suspend_state_t state)
 {
@@ -47,6 +48,13 @@ static bool need_suspend_ops(suspend_state_t state)
 static DECLARE_WAIT_QUEUE_HEAD(suspend_freeze_wait_head);
 static bool suspend_freeze_wake;
 
+void freeze_set_ops(const struct platform_freeze_ops *ops)
+{
+	lock_system_sleep();
+	freeze_ops = ops;
+	unlock_system_sleep();
+}
+
 static void freeze_begin(void)
 {
 	suspend_freeze_wake = false;
@@ -291,6 +299,10 @@ int suspend_devices_and_enter(suspend_state_t state)
 		error = suspend_ops->begin(state);
 		if (error)
 			goto Close;
+	} else if (state == PM_SUSPEND_FREEZE && freeze_ops->begin) {
+		error = freeze_ops->begin();
+		if (error)
+			goto Close;
 	}
 	suspend_console();
 	suspend_test_start();
@@ -316,6 +328,9 @@ int suspend_devices_and_enter(suspend_state_t state)
  Close:
 	if (need_suspend_ops(state) && suspend_ops->end)
 		suspend_ops->end();
+	else if (state == PM_SUSPEND_FREEZE && freeze_ops->end)
+		freeze_ops->end();
+
 	trace_machine_suspend(PWR_EVENT_EXIT);
 	return error;