Add pm_qos_cancel_request_lazy() which is convenient for
contexts that may not sleep.
Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
---
include/linux/pm_qos.h | 2 ++
kernel/power/qos.c | 20 ++++++++++++++++++++
2 files changed, 22 insertions(+)
diff --git a/include/linux/pm_qos.h b/include/linux/pm_qos.h
index 7b3ae0c..f44d353 100644
--- a/include/linux/pm_qos.h
+++ b/include/linux/pm_qos.h
@@ -126,6 +126,8 @@ void pm_qos_update_request(struct pm_qos_request *req,
s32 new_value);
void pm_qos_update_request_timeout(struct pm_qos_request *req,
s32 new_value, unsigned long timeout_us);
+void pm_qos_cancel_request_lazy(struct pm_qos_request *req,
+ unsigned int timeout_us);
void pm_qos_remove_request(struct pm_qos_request *req);
int pm_qos_request(int pm_qos_class);
diff --git a/kernel/power/qos.c b/kernel/power/qos.c
index 97b0df7..ac131cb 100644
--- a/kernel/power/qos.c
+++ b/kernel/power/qos.c
@@ -517,6 +517,26 @@ void pm_qos_update_request_timeout(struct pm_qos_request *req, s32 new_value,
}
/**
+ * pm_qos_cancel_request_lazy - cancels an existing qos request lazily.
+ * @req : handle to list element holding a pm_qos request to use
+ * @timeout_us: the delay before cancelling this qos request in usecs.
+ *
+ * After timeout_us, this qos request is cancelled.
+ */
+void pm_qos_cancel_request_lazy(struct pm_qos_request *req,
+ unsigned int timeout_us)
+{
+ if (!req)
+ return;
+ if (WARN(!pm_qos_request_active(req),
+ "%s called for unknown object.", __func__))
+ return;
+
+ schedule_delayed_work(&req->work, usecs_to_jiffies(timeout_us));
+}
+EXPORT_SYMBOL_GPL(pm_qos_cancel_request_lazy);
+
+/**
* pm_qos_remove_request - modifies an existing qos request
* @req: handle to request list element
*
--
1.9.1
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