diff options
| -rw-r--r-- | include/linux/pm_qos.h | 3 | ||||
| -rw-r--r-- | kernel/power/qos.c | 31 |
2 files changed, 31 insertions, 3 deletions
diff --git a/include/linux/pm_qos.h b/include/linux/pm_qos.h index 5a95013905c..218a8227ec4 100644 --- a/include/linux/pm_qos.h +++ b/include/linux/pm_qos.h @@ -40,6 +40,7 @@ enum pm_qos_flags_status { struct pm_qos_request { struct plist_node node; int pm_qos_class; + bool timeout_enabled; struct delayed_work work; /* for pm_qos_update_request_timeout */ }; @@ -114,6 +115,8 @@ void pm_qos_add_request(struct pm_qos_request *req, int pm_qos_class, s32 value); void pm_qos_update_request(struct pm_qos_request *req, s32 new_value); +void pm_qos_add_request_timeout(struct pm_qos_request *req, int pm_qos_class, + s32 value); void pm_qos_update_request_timeout(struct pm_qos_request *req, s32 new_value, unsigned long timeout_us); void pm_qos_remove_request(struct pm_qos_request *req); diff --git a/kernel/power/qos.c b/kernel/power/qos.c index 587dddeebf1..f2d81c593af 100644 --- a/kernel/power/qos.c +++ b/kernel/power/qos.c @@ -358,8 +358,8 @@ void pm_qos_update_request(struct pm_qos_request *req, WARN(1, KERN_ERR "pm_qos_update_request() called for unknown object\n"); return; } - - cancel_delayed_work_sync(&req->work); + if (req->timeout_enabled) + cancel_delayed_work_sync(&req->work); if (new_value != req->node.prio) pm_qos_update_target( @@ -369,6 +369,27 @@ void pm_qos_update_request(struct pm_qos_request *req, EXPORT_SYMBOL_GPL(pm_qos_update_request); /** + * pm_qos_add_request_timeout - inserts new qos request into the list + * @req: pointer to a preallocated handle + * @pm_qos_class: identifies which list of qos request to use + * @value: defines the qos request + * + * This function inserts a new entry in the pm_qos_class list of requested qos + * performance characteristics and allows to update this request with timeout by + * function pm_qos_update_request_timeout. It recomputes the aggregate QoS + * expectations for the pm_qos_class of parameters and initializes + * the pm_qos_request handle. Caller needs to save this handle for later use + * in updates and removal. + */ + +void pm_qos_add_request_timeout(struct pm_qos_request *req, int pm_qos_class, + s32 value) +{ + req->timeout_enabled = true; + pm_qos_add_request(req, pm_qos_class, value); +} + +/** * pm_qos_update_request_timeout - modifies an existing qos request temporarily. * @req : handle to list element holding a pm_qos request to use * @new_value: defines the temporal qos request @@ -384,6 +405,9 @@ void pm_qos_update_request_timeout(struct pm_qos_request *req, s32 new_value, if (WARN(!pm_qos_request_active(req), "%s called for unknown object.", __func__)) return; + if (WARN(!req->timeout_enabled, + "%s called for non-timeout request.", __func__)) + return; cancel_delayed_work_sync(&req->work); @@ -414,7 +438,8 @@ void pm_qos_remove_request(struct pm_qos_request *req) return; } - cancel_delayed_work_sync(&req->work); + if (req->timeout_enabled) + cancel_delayed_work_sync(&req->work); pm_qos_update_target(pm_qos_array[req->pm_qos_class]->constraints, &req->node, PM_QOS_REMOVE_REQ, |