1 files changed, 36 insertions, 6 deletions

diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index a85459126bc..59f8ab23548 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -46,6 +46,7 @@ LIST_HEAD(dpm_prepared_list);
 LIST_HEAD(dpm_suspended_list);
 LIST_HEAD(dpm_noirq_list);
 
+struct suspend_stats suspend_stats;
 static DEFINE_MUTEX(dpm_list_mtx);
 static pm_message_t pm_transition;
 
@@ -65,6 +66,7 @@ void device_pm_init(struct device *dev)
         spin_lock_init(&dev->power.lock);
         pm_runtime_init(dev);
         INIT_LIST_HEAD(&dev->power.entry);
+        dev->power.power_state = PMSG_INVALID;
 }
 
 /**
@@ -96,6 +98,7 @@ void device_pm_add(struct device *dev)
                 dev_warn(dev, "parent %s should not be sleeping\n",
                         dev_name(dev->parent));
         list_add_tail(&dev->power.entry, &dpm_list);
+        dev_pm_qos_constraints_init(dev);
         mutex_unlock(&dpm_list_mtx);
 }
 
@@ -109,6 +112,7 @@ void device_pm_remove(struct device *dev)
                  dev->bus ? dev->bus->name : "No Bus", dev_name(dev));
         complete_all(&dev->power.completion);
         mutex_lock(&dpm_list_mtx);
+        dev_pm_qos_constraints_destroy(dev);
         list_del_init(&dev->power.entry);
         mutex_unlock(&dpm_list_mtx);
         device_wakeup_disable(dev);
@@ -464,8 +468,12 @@ void dpm_resume_noirq(pm_message_t state)
                 mutex_unlock(&dpm_list_mtx);
 
                 error = device_resume_noirq(dev, state);
-                if (error)
+                if (error) {
+                        suspend_stats.failed_resume_noirq++;
+                        dpm_save_failed_step(SUSPEND_RESUME_NOIRQ);
+                        dpm_save_failed_dev(dev_name(dev));
                         pm_dev_err(dev, state, " early", error);
+                }
 
                 mutex_lock(&dpm_list_mtx);
                 put_device(dev);
@@ -626,8 +634,12 @@ void dpm_resume(pm_message_t state)
                         mutex_unlock(&dpm_list_mtx);
 
                         error = device_resume(dev, state, false);
-                        if (error)
+                        if (error) {
+                                suspend_stats.failed_resume++;
+                                dpm_save_failed_step(SUSPEND_RESUME);
+                                dpm_save_failed_dev(dev_name(dev));
                                 pm_dev_err(dev, state, "", error);
+                        }
 
                         mutex_lock(&dpm_list_mtx);
                 }
@@ -802,6 +814,9 @@ int dpm_suspend_noirq(pm_message_t state)
                 mutex_lock(&dpm_list_mtx);
                 if (error) {
                         pm_dev_err(dev, state, " late", error);
+                        suspend_stats.failed_suspend_noirq++;
+                        dpm_save_failed_step(SUSPEND_SUSPEND_NOIRQ);
+                        dpm_save_failed_dev(dev_name(dev));
                         put_device(dev);
                         break;
                 }
@@ -902,7 +917,11 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async)
         }
 
  End:
-        dev->power.is_suspended = !error;
+        if (!error) {
+                dev->power.is_suspended = true;
+                if (dev->power.wakeup_path && dev->parent)
+                        dev->parent->power.wakeup_path = true;
+        }
 
         device_unlock(dev);
         complete_all(&dev->power.completion);
@@ -923,8 +942,10 @@ static void async_suspend(void *data, async_cookie_t cookie)
         int error;
 
         error = __device_suspend(dev, pm_transition, true);
-        if (error)
+        if (error) {
+                dpm_save_failed_dev(dev_name(dev));
                 pm_dev_err(dev, pm_transition, " async", error);
+        }
 
         put_device(dev);
 }
@@ -967,6 +988,7 @@ int dpm_suspend(pm_message_t state)
                 mutex_lock(&dpm_list_mtx);
                 if (error) {
                         pm_dev_err(dev, state, "", error);
+                        dpm_save_failed_dev(dev_name(dev));
                         put_device(dev);
                         break;
                 }
@@ -980,7 +1002,10 @@ int dpm_suspend(pm_message_t state)
         async_synchronize_full();
         if (!error)
                 error = async_error;
-        if (!error)
+        if (error) {
+                suspend_stats.failed_suspend++;
+                dpm_save_failed_step(SUSPEND_SUSPEND);
+        } else
                 dpm_show_time(starttime, state, NULL);
         return error;
 }
@@ -999,6 +1024,8 @@ static int device_prepare(struct device *dev, pm_message_t state)
 
         device_lock(dev);
 
+        dev->power.wakeup_path = device_may_wakeup(dev);
+
         if (dev->pm_domain) {
                 pm_dev_dbg(dev, state, "preparing power domain ");
                 if (dev->pm_domain->ops.prepare)
@@ -1088,7 +1115,10 @@ int dpm_suspend_start(pm_message_t state)
         int error;
 
         error = dpm_prepare(state);
-        if (!error)
+        if (error) {
+                suspend_stats.failed_prepare++;
+                dpm_save_failed_step(SUSPEND_PREPARE);
+        } else
                 error = dpm_suspend(state);
         return error;
 }