ACPI: PM: Emit debug messages when enabling/disabling wakeup power

Print additional debug messages when enabling and disabling wakeup
power for an ACPI device object to facilitate more fine-grained
debugging of problems in that area.

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

diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index 5dcb02ededbc591056a84f73439b2359073e70b6..7945e60f9b6a24f17c3747ba146bd207288d0f48 100644 (file)
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -716,6 +716,9 @@ int acpi_enable_wakeup_device_power(struct acpi_device *dev, int sleep_state)
 
        mutex_lock(&acpi_device_lock);
 
+       dev_dbg(&dev->dev, "Enabling wakeup power (count %d)\n",
+               dev->wakeup.prepare_count);
+
        if (dev->wakeup.prepare_count++)
                goto out;
 
@@ -734,8 +737,11 @@ int acpi_enable_wakeup_device_power(struct acpi_device *dev, int sleep_state)
        if (err) {
                acpi_power_off_list(&dev->wakeup.resources);
                dev->wakeup.prepare_count = 0;
+               goto out;
        }
 
+       dev_dbg(&dev->dev, "Wakeup power enabled\n");
+
  out:
        mutex_unlock(&acpi_device_lock);
        return err;
@@ -757,6 +763,9 @@ int acpi_disable_wakeup_device_power(struct acpi_device *dev)
 
        mutex_lock(&acpi_device_lock);
 
+       dev_dbg(&dev->dev, "Disabling wakeup power (count %d)\n",
+               dev->wakeup.prepare_count);
+
        /* Do nothing if wakeup power has not been enabled for this device. */
        if (dev->wakeup.prepare_count <= 0)
                goto out;
@@ -782,8 +791,11 @@ int acpi_disable_wakeup_device_power(struct acpi_device *dev)
        if (err) {
                dev_err(&dev->dev, "Cannot turn off wakeup power resources\n");
                dev->wakeup.flags.valid = 0;
+               goto out;
        }
 
+       dev_dbg(&dev->dev, "Wakeup power disabled\n");
+
  out:
        mutex_unlock(&acpi_device_lock);
        return err;