Commit c68ce699 authored Jan 02, 2018 by Chris Wilson

drm/i915: Assert we do not try to wait on an invalid seqno



We should never insert the invalid seqno into the wait tree, so assert
we do not.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Michał Winiarski <michal.winiarski@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180102192500.20364-1-chris@chris-wilson.co.uk

parent 6f25d0be

drivers/gpu/drm/i915/intel_breadcrumbs.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -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

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