[Intel-gfx] [PATCH 02/12] drm/i915/gt: Check for a completed last request once

[Chris Wilson <chris@chris-wilson.co.uk>]

Pull the repeated check for the last active request being completed to a
single spot, when deciding whether or not execlist preemption is
required.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/gt/intel_lrc.c | 14 ++++----------
 1 file changed, 4 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c
index 4eb397b0e14d..7bdbfac26d7b 100644
--- a/drivers/gpu/drm/i915/gt/intel_lrc.c
+++ b/drivers/gpu/drm/i915/gt/intel_lrc.c
@@ -2137,12 +2137,11 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
 	 */
 
 	if ((last = *active)) {
-		if (need_preempt(engine, last, rb)) {
-			if (i915_request_completed(last)) {
-				tasklet_hi_schedule(&execlists->tasklet);
-				return;
-			}
+		if (i915_request_completed(last) &&
+		    !list_is_last(&last->sched.link, &engine->active.requests))
+			return;
 
+		if (need_preempt(engine, last, rb)) {
 			ENGINE_TRACE(engine,
 				     "preempting last=%llx:%lld, prio=%d, hint=%d\n",
 				     last->fence.context,
@@ -2170,11 +2169,6 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
 			last = NULL;
 		} else if (need_timeslice(engine, last, rb) &&
 			   timeslice_expired(execlists, last)) {
-			if (i915_request_completed(last)) {
-				tasklet_hi_schedule(&execlists->tasklet);
-				return;
-			}
-
 			ENGINE_TRACE(engine,
 				     "expired last=%llx:%lld, prio=%d, hint=%d, yield?=%s\n",
 				     last->fence.context,
-- 
2.20.1

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