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

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);
}