From: Rafael J. Wysocki <rafael.j.wyso...@intel.com>
Add an acpi_handle_debug() statement to acpi_device_set_power() to
allow ACPI device power state changes to be tracked.
Signed-off-by: Rafael J. Wysocki <rafael.j.wyso...@intel.com>
---
drivers/acpi/device_pm.c | 4 ++++
1 file changed, 4 insertions(+)
Index: linux-pm/drivers/acpi/device_pm.c
===================================================================
--- linux-pm.orig/drivers/acpi/device_pm.c
+++ linux-pm/drivers/acpi/device_pm.c
@@ -166,6 +166,10 @@ int acpi_device_set_power(struct acpi_de
|| (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3_COLD))
return -EINVAL;
+ acpi_handle_debug(device->handle, "Power state change: %s -> %s\n",
+ acpi_power_state_string(device->power.state),
+ acpi_power_state_string(state));
+
/* Make sure this is a valid target state */
/* There is a special case for D0 addressed below. */
