PM / QoS: Add pm_qos_cancel_request_lazy() that doesn't sleep

[android-x86/kernel.git] / kernel / power / qos.c

diff --git a/kernel/power/qos.c b/kernel/power/qos.c
index 97b0df7..ac131cb 100644 (file)
--- 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
  *