[PATCH] complain when users abuse the pm_qos API by updating a request thatisn't registered yet.

[mgross]

---
 kernel/pm_qos_params.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/kernel/pm_qos_params.c b/kernel/pm_qos_params.c
index f42d3f7..8e55bf1 100644
--- a/kernel/pm_qos_params.c
+++ b/kernel/pm_qos_params.c
@@ -266,6 +266,10 @@ void pm_qos_update_request(struct pm_qos_request_list *pm_qos_req,
 		spin_unlock_irqrestore(&pm_qos_lock, flags);
 		if (pending_update)
 			update_target(pm_qos_req->pm_qos_class);
+	} else {
+		WARN(true, "pm_qos: updating an unregistered request "
+				"does nothing");
+		dump_stack();
 	}
 }
 EXPORT_SYMBOL_GPL(pm_qos_update_request);
-- 
1.7.0.4

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