[PATCH 13/15] drm/i915: Assert we do not try to wait on an invalid seqno
Chris Wilson
chris at chris-wilson.co.uk
Wed Jan 3 13:01:00 UTC 2018
We should never insert the invalid seqno into the wait tree, so assert
we do not.
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
drivers/gpu/drm/i915/intel_breadcrumbs.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_breadcrumbs.c b/drivers/gpu/drm/i915/intel_breadcrumbs.c
index 6dd6bc9811a8..e96f733c85b0 100644
--- a/drivers/gpu/drm/i915/intel_breadcrumbs.c
+++ b/drivers/gpu/drm/i915/intel_breadcrumbs.c
@@ -396,6 +396,8 @@ static bool __intel_engine_add_wait(struct intel_engine_cs *engine,
bool first, armed;
u32 seqno;
+ GEM_BUG_ON(!wait->seqno);
+
/* Insert the request into the retirement ordered list
* of waiters by walking the rbtree. If we are the oldest
* seqno in the tree (the first to be retired), then
--
2.15.1
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