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drm/i915/gt: Don't cancel the interrupt shadow too early 

We currently want to keep the interrupt enabled until the interrupt after
which we have no more work to do. This heuristic was broken by us
kicking the irq-work on adding a completed request without attaching a
signaler -- hence it appearing to the irq-worker that an interrupt had
fired when we were idle.

Fixes: 2854d86632 ("drm/i915/gt: Replace intel_engine_transfer_stale_breadcrumbs")
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/20201123113717.20500-3-chris@chris-wilson.co.uk
(cherry picked from commit 3aef910d26)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
pull/626/merge
Chris Wilson 2020-11-23 11:37:16 +00:00 committed by Rodrigo Vivi
parent eb0104ee49
commit 2e6ce8313a
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/i915/gt/intel_breadcrumbs.c
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@ -229,7 +229,7 @@ static void signal_irq_work(struct irq_work *work)
* interrupt draw less ire from other users of the system and tools
* like powertop.
*/
if (b->irq_armed && list_empty(&b->signalers))
if (!signal && b->irq_armed && list_empty(&b->signalers))
__intel_breadcrumbs_disarm_irq(b);
list_for_each_entry_safe(ce, cn, &b->signalers, signal_link) {