PM / QoS: Add pm_qos_request tracepoints

Adds tracepoints to pm_qos_add_request, pm_qos_update_request,
pm_qos_remove_request, and pm_qos_update_request_timeout.
It's useful for checking pm_qos_class, value, and timeout_us.

Signed-off-by: Sahara <keun-o.park@windriver.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/kernel/power/qos.c b/kernel/power/qos.c
index 4fb8d1427938..06fe28589e9c 100644
--- a/kernel/power/qos.c
+++ b/kernel/power/qos.c
@@ -336,6 +336,7 @@ 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);
 }
@@ -364,6 +365,7 @@ void pm_qos_update_request(struct pm_qos_request *req,
 
         cancel_delayed_work_sync(&req->work);
 
+        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,
@@ -390,6 +392,8 @@ 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,
@@ -419,6 +423,7 @@ 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);