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drm/i915/breadcrumbs: Assert all missed breadcrumbs were signaled

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When parking the engines and their breadcrumbs, if we have waiters left
then they missed their wakeup. Verify that each waiter's seqno did
complete.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180222092545.17216-2-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2018-02-22 09:25:45 +00:00
parent cd46c545b7
commit 9792e213a4
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/i915/intel_breadcrumbs.c
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@ -247,6 +247,8 @@ void intel_engine_disarm_breadcrumbs(struct intel_engine_cs *engine)
spin_unlock(&b->irq_lock);
rbtree_postorder_for_each_entry_safe(wait, n, &b->waiters, node) {
GEM_BUG_ON(!i915_seqno_passed(intel_engine_get_seqno(engine),
wait->seqno));
RB_CLEAR_NODE(&wait->node);
wake_up_process(wait->tsk);
}