drm/i915/gt: Move the breadcrumb to the signaler if completed upon cancel
If while we are cancelling the breadcrumb signaling, we find that the request is already completed, move it to the irq signaler and let it be signaled. v2: Tweak reference counting so that we only acquire a new reference on adding to a signal list, as opposed to a hidden i915_request_put of the caller's reference. Signed-off-by:Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by:
Tvrtko Ursulin <tvrtko.ursulin@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20201126140407.31952-5-chris@chris-wilson.co.uk
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