msm: kgsl: Always send fence sync the timestamp it expects

Fence sync seems to react badly when it gets a unexpected timestamp
on a timeline.  When a event expires always send the expected timestamp
even if the event expired because the context was destroyed.

Change-Id: Ic0dedbad770363a00257d62c4940f7743bc33060
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
diff --git a/drivers/gpu/msm/kgsl_sync.c b/drivers/gpu/msm/kgsl_sync.c
index 9325124..d9ab081 100644
--- a/drivers/gpu/msm/kgsl_sync.c
+++ b/drivers/gpu/msm/kgsl_sync.c
@@ -69,6 +69,7 @@
 
 struct kgsl_fence_event_priv {
 	struct kgsl_context *context;
+	unsigned int timestamp;
 };
 
 /**
@@ -85,7 +86,7 @@
 	void *priv, u32 context_id, u32 timestamp)
 {
 	struct kgsl_fence_event_priv *ev = priv;
-	kgsl_sync_timeline_signal(ev->context->timeline, timestamp);
+	kgsl_sync_timeline_signal(ev->context->timeline, ev->timestamp);
 	kgsl_context_put(ev->context);
 	kfree(ev);
 }
@@ -125,6 +126,7 @@
 	if (event == NULL)
 		return -ENOMEM;
 	event->context = context;
+	event->timestamp = timestamp;
 	kgsl_context_get(context);
 
 	pt = kgsl_sync_pt_create(context->timeline, timestamp);