commit 429b038c203c8a2d3ead67f5ed3a9c5162764d50
author Linux Build Service Account <lnxbuild@quicinc.com> Mon Aug 21 05:14:39 2017 -0700
committer Gerrit - the friendly Code Review server <code-review@localhost> Mon Aug 21 05:14:38 2017 -0700
tree 77fd83128951ac4cc2e57db8e0d3543574b6d2db
parent 1e801a2f92774ee55620acc7316f11789692ff0e
parent 8795cc686e9cb3355cf28900d68b652bc172a58e

Merge "msm: kgsl: Don't signal the timeline if its refcount is zero"

drivers/gpu/msm/kgsl_sync.c

diff --git a/drivers/gpu/msm/kgsl_sync.c b/drivers/gpu/msm/kgsl_sync.c
index 8f8e3e9..015d07f 100644
--- a/drivers/gpu/msm/kgsl_sync.c
+++ b/drivers/gpu/msm/kgsl_sync.c
@@ -370,7 +370,8 @@
 	unsigned long flags;
 	struct kgsl_sync_fence *kfence, *next;
 
-	kref_get(&ktimeline->kref);
+	if (!kref_get_unless_zero(&ktimeline->kref))
+		return;
 
 	spin_lock_irqsave(&ktimeline->lock, flags);
 	if (timestamp_cmp(timestamp, ktimeline->last_timestamp) > 0)