1 files changed, 23 insertions, 9 deletions

diff --git a/kernel/power/qos.c b/kernel/power/qos.c
index 587dddeebf15..a394297f8b2f 100644
--- a/kernel/power/qos.c
+++ b/kernel/power/qos.c
@@ -44,6 +44,7 @@
 
 #include <linux/uaccess.h>
 #include <linux/export.h>
+#include <trace/events/power.h>
 
 /*
  * locking rule: all changes to constraints or notifiers lists
@@ -202,6 +203,7 @@ int pm_qos_update_target(struct pm_qos_constraints *c, struct plist_node *node,
 
         spin_unlock_irqrestore(&pm_qos_lock, flags);
 
+        trace_pm_qos_update_target(action, prev_value, curr_value);
         if (prev_value != curr_value) {
                 blocking_notifier_call_chain(c->notifiers,
                                              (unsigned long)curr_value,
@@ -272,6 +274,7 @@ bool pm_qos_update_flags(struct pm_qos_flags *pqf,
 
         spin_unlock_irqrestore(&pm_qos_lock, irqflags);
 
+        trace_pm_qos_update_flags(action, prev_value, curr_value);
         return prev_value != curr_value;
 }
 
@@ -293,6 +296,17 @@ int pm_qos_request_active(struct pm_qos_request *req)
 }
 EXPORT_SYMBOL_GPL(pm_qos_request_active);
 
+static void __pm_qos_update_request(struct pm_qos_request *req,
+                           s32 new_value)
+{
+        trace_pm_qos_update_request(req->pm_qos_class, new_value);
+
+        if (new_value != req->node.prio)
+                pm_qos_update_target(
+                        pm_qos_array[req->pm_qos_class]->constraints,
+                        &req->node, PM_QOS_UPDATE_REQ, new_value);
+}
+
 /**
  * pm_qos_work_fn - the timeout handler of pm_qos_update_request_timeout
  * @work: work struct for the delayed work (timeout)
@@ -305,7 +319,7 @@ static void pm_qos_work_fn(struct work_struct *work)
                                                   struct pm_qos_request,
                                                   work);
 
-        pm_qos_update_request(req, PM_QOS_DEFAULT_VALUE);
+        __pm_qos_update_request(req, PM_QOS_DEFAULT_VALUE);
 }
 
 /**
@@ -333,6 +347,7 @@ void pm_qos_add_request(struct pm_qos_request *req,
         }
         req->pm_qos_class = pm_qos_class;
         INIT_DELAYED_WORK(&req->work, pm_qos_work_fn);
+        trace_pm_qos_add_request(pm_qos_class, value);
         pm_qos_update_target(pm_qos_array[pm_qos_class]->constraints,
                              &req->node, PM_QOS_ADD_REQ, value);
 }
@@ -360,11 +375,7 @@ void pm_qos_update_request(struct pm_qos_request *req,
         }
 
         cancel_delayed_work_sync(&req->work);
-
-        if (new_value != req->node.prio)
-                pm_qos_update_target(
-                        pm_qos_array[req->pm_qos_class]->constraints,
-                        &req->node, PM_QOS_UPDATE_REQ, new_value);
+        __pm_qos_update_request(req, new_value);
 }
 EXPORT_SYMBOL_GPL(pm_qos_update_request);
 
@@ -387,6 +398,8 @@ void pm_qos_update_request_timeout(struct pm_qos_request *req, s32 new_value,
 
         cancel_delayed_work_sync(&req->work);
 
+        trace_pm_qos_update_request_timeout(req->pm_qos_class,
+                                            new_value, timeout_us);
         if (new_value != req->node.prio)
                 pm_qos_update_target(
                         pm_qos_array[req->pm_qos_class]->constraints,
@@ -416,6 +429,7 @@ void pm_qos_remove_request(struct pm_qos_request *req)
 
         cancel_delayed_work_sync(&req->work);
 
+        trace_pm_qos_remove_request(req->pm_qos_class, PM_QOS_DEFAULT_VALUE);
         pm_qos_update_target(pm_qos_array[req->pm_qos_class]->constraints,
                              &req->node, PM_QOS_REMOVE_REQ,
                              PM_QOS_DEFAULT_VALUE);
@@ -477,7 +491,7 @@ static int find_pm_qos_object_by_minor(int minor)
 {
         int pm_qos_class;
 
-        for (pm_qos_class = 0;
+        for (pm_qos_class = PM_QOS_CPU_DMA_LATENCY;
                 pm_qos_class < PM_QOS_NUM_CLASSES; pm_qos_class++) {
                 if (minor ==
                         pm_qos_array[pm_qos_class]->pm_qos_power_miscdev.minor)
@@ -491,7 +505,7 @@ static int pm_qos_power_open(struct inode *inode, struct file *filp)
         long pm_qos_class;
 
         pm_qos_class = find_pm_qos_object_by_minor(iminor(inode));
-        if (pm_qos_class >= 0) {
+        if (pm_qos_class >= PM_QOS_CPU_DMA_LATENCY) {
                 struct pm_qos_request *req = kzalloc(sizeof(*req), GFP_KERNEL);
                 if (!req)
                         return -ENOMEM;
@@ -584,7 +598,7 @@ static int __init pm_qos_power_init(void)
 
         BUILD_BUG_ON(ARRAY_SIZE(pm_qos_array) != PM_QOS_NUM_CLASSES);
 
-        for (i = 1; i < PM_QOS_NUM_CLASSES; i++) {
+        for (i = PM_QOS_CPU_DMA_LATENCY; i < PM_QOS_NUM_CLASSES; i++) {
                 ret = register_pm_qos_misc(pm_qos_array[i]);
                 if (ret < 0) {
                         printk(KERN_ERR "pm_qos_param: %s setup failed\n",