From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Thu, 22 Feb 2018 09:25:45 +0000
Subject: drm/i915/breadcrumbs: Assert all missed breadcrumbs were signaled
Git-commit: 9792e213a4c9b16b814c0865ea0cc5d5125e052b
Patch-mainline: v4.17-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
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
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/i915/intel_breadcrumbs.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/gpu/drm/i915/intel_breadcrumbs.c
+++ b/drivers/gpu/drm/i915/intel_breadcrumbs.c
@@ -247,6 +247,8 @@ void intel_engine_disarm_breadcrumbs(str
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);
}