diff options
| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2019-08-02 12:26:02 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2019-08-08 11:32:51 +0200 |
| commit | ee8193ee96c7802b5ba766243c4c950059a43323 (patch) | |
| tree | c33254352b737c909f0229dc3ad3fe95dedc7499 | |
| parent | e21a712a9685488f5ce80495b37b9fdbe96c230d (diff) | |
ACPI: PM: Print debug messages on device power state changes
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.wysocki@intel.com>
| -rw-r--r-- | drivers/acpi/device_pm.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c index f616b16c1f0b..4cb93d4f2ab6 100644 --- a/drivers/acpi/device_pm.c +++ b/drivers/acpi/device_pm.c @@ -166,6 +166,10 @@ int acpi_device_set_power(struct acpi_device *device, int state) || (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. */ |