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drm/i915/gt: Flush engine parking before release

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Due to the asynchronous nature of releasing our wakerefs, we can signal
the main GT wakeref as complete before the individual engines have
cleared their own wakerefs. During shutdown we assert that the engines
are indeed parked before we release them, but for this to be always true
we need to flush their workers as well.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200124143339.140988-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2020-01-24 14:33:39 +00:00
parent 646603d9ab
commit 0ea60c1d73
1 changed files with 1 additions and 0 deletions
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drivers/gpu/drm/i915/gt/intel_engine_cs.c
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@ -408,6 +408,7 @@ void intel_engines_release(struct intel_gt *gt)
/* Decouple the backend; but keep the layout for late GPU resets */
for_each_engine(engine, gt, id) {
intel_wakeref_wait_for_idle(&engine->wakeref);
GEM_BUG_ON(intel_engine_pm_is_awake(engine));
if (!engine->release)