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path: root/drivers/gpu/drm/i915/gt/intel_timeline.c
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Diffstat (limited to 'drivers/gpu/drm/i915/gt/intel_timeline.c')
-rw-r--r--drivers/gpu/drm/i915/gt/intel_timeline.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gt/intel_timeline.c b/drivers/gpu/drm/i915/gt/intel_timeline.c
index 91debbc97c9a..08b56d7ab4f4 100644
--- a/drivers/gpu/drm/i915/gt/intel_timeline.c
+++ b/drivers/gpu/drm/i915/gt/intel_timeline.c
@@ -521,6 +521,8 @@ int intel_timeline_read_hwsp(struct i915_request *from,
rcu_read_lock();
cl = rcu_dereference(from->hwsp_cacheline);
+ if (i915_request_completed(from)) /* confirm cacheline is valid */
+ goto unlock;
if (unlikely(!i915_active_acquire_if_busy(&cl->active)))
goto unlock; /* seqno wrapped and completed! */
if (unlikely(i915_request_completed(from)))