[PATCH 3.10 22/62] PM / QoS: remove duplicate call to pm_qos_update_target

From: Greg Kroah-Hartman
Date: Mon Mar 16 2015 - 10:42:50 EST

3.10-stable review patch. If anyone has any objections, please let me know.


From: Michael Scott <michael.scott@xxxxxxxxxx>

In 3.10.y backport patch 1dba303727f52ea062580b0a9b3f0c3b462769cf,
the logic to call pm_qos_update_target was moved to __pm_qos_update_request.
However, the original code was left in function pm_qos_update_request.

Currently, if pm_qos_update_request is called where new_value !=
req->node.prio then pm_qos_update_target will be called twice in a row.
Once in pm_qos_update_request and then again in the following call to

Removing the left over code from pm_qos_update_request stops this second
call to pm_qos_update_target where the work of removing / re-adding the
new_value in the constraints list would be duplicated.

Signed-off-by: Michael Scott <michael.scott@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
kernel/power/qos.c | 6 ------
1 file changed, 6 deletions(-)

--- a/kernel/power/qos.c
+++ b/kernel/power/qos.c
@@ -369,12 +369,6 @@ void pm_qos_update_request(struct pm_qos

- 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);

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