ACPI: PM: Print debug messages when enabling GPEs for wakeup

In sufficiently complicated GPE configurations it is hard to
determine which GPE could be the source of system wakeup from a sleep
state, so make __acpi_device_wakeup_enable() print that information
to the kernel log if debugging is enabled.

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 824ae985ad93bebacbb70010e2e2c632a3d143a8..5b50f884712c20db10065f5e8c4445a4d273c9e4 100644 (file)
--- a/drivers/acpi/device_pm.c
+++ b/drivers/acpi/device_pm.c
@@ -728,6 +728,9 @@ static int __acpi_device_wakeup_enable(struct acpi_device *adev,
                goto out;
        }
 
+       acpi_handle_debug(adev->handle, "GPE%2X enabled for wakeup\n",
+                         (unsigned int)wakeup->gpe_number);
+
 inc:
        wakeup->enable_count++;