1 files changed, 15 insertions, 2 deletions

diff --git a/drivers/base/power/suspend.c b/drivers/base/power/suspend.c
index a0b5cf689e63..0ec44ef840be 100644
--- a/drivers/base/power/suspend.c
+++ b/drivers/base/power/suspend.c
@@ -39,12 +39,25 @@ int suspend_device(struct device * dev, pm_message_t state)
 {
         int error = 0;
 
-        dev_dbg(dev, "suspending\n");
+        if (dev->power.power_state) {
+                dev_dbg(dev, "PM: suspend %d-->%d\n",
+                        dev->power.power_state, state);
+        }
+        if (dev->power.pm_parent
+                        && dev->power.pm_parent->power.power_state) {
+                dev_err(dev,
+                        "PM: suspend %d->%d, parent %s already %d\n",
+                        dev->power.power_state, state,
+                        dev->power.pm_parent->bus_id,
+                        dev->power.pm_parent->power.power_state);
+        }
 
         dev->power.prev_state = dev->power.power_state;
 
-        if (dev->bus && dev->bus->suspend && !dev->power.power_state)
+        if (dev->bus && dev->bus->suspend && !dev->power.power_state) {
+                dev_dbg(dev, "suspending\n");
                 error = dev->bus->suspend(dev, state);
+        }
 
         return error;
 }