ACPI / PM: Add debug statements to acpi_pm_notify_handler()

Add statements to trace invocations of the ACPI PM notify handler
and the work functions called by it.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c
index 112fd6c..fbcc73f 100644 (file)
--- a/drivers/acpi/device_pm.c
+++ b/drivers/acpi/device_pm.c
@@ -401,6 +401,8 @@ static void acpi_pm_notify_handler(acpi_handle handle, u32 val, void *not_used)
        if (val != ACPI_NOTIFY_DEVICE_WAKE)
                return;
 
+       acpi_handle_debug(handle, "Wake notify\n");
+
        adev = acpi_bus_get_acpi_device(handle);
        if (!adev)
                return;
@@ -409,8 +411,12 @@ static void acpi_pm_notify_handler(acpi_handle handle, u32 val, void *not_used)
 
        if (adev->wakeup.flags.notifier_present) {
                pm_wakeup_ws_event(adev->wakeup.ws, 0, acpi_s2idle_wakeup());
-               if (adev->wakeup.context.func)
+               if (adev->wakeup.context.func) {
+                       acpi_handle_debug(handle, "Running %pF for %s\n",
+                                         adev->wakeup.context.func,
+                                         dev_name(adev->wakeup.context.dev));
                        adev->wakeup.context.func(&adev->wakeup.context);
+               }
        }
 
        mutex_unlock(&acpi_pm_notifier_lock);