[PATCH v4 1/3] drm/i915/guc: Flush context destruction worker at suspend

[Alan Previn]

When suspending, flush the context-guc-id
deregistration worker at the final stages of
intel_gt_suspend_late when we finally call gt_sanitize
that eventually leads down to __uc_sanitize so that
the deregistration worker doesn't fire off later as
we reset the GuC microcontroller.

Signed-off-by: Alan Previn <alan.previn.teres.alexis at intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
Tested-by: Mousumi Jana <mousumi.jana at intel.com>
---
 drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c | 5 +++++
 drivers/gpu/drm/i915/gt/uc/intel_guc_submission.h | 2 ++
 drivers/gpu/drm/i915/gt/uc/intel_uc.c             | 2 ++
 3 files changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
index ae3495a9c814..fdd7179f502a 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -1610,6 +1610,11 @@ static void guc_flush_submissions(struct intel_guc *guc)
 	spin_unlock_irqrestore(&sched_engine->lock, flags);
 }
 
+void intel_guc_submission_flush_work(struct intel_guc *guc)
+{
+	flush_work(&guc->submission_state.destroyed_worker);
+}
+
 static void guc_flush_destroyed_contexts(struct intel_guc *guc);
 
 void intel_guc_submission_reset_prepare(struct intel_guc *guc)
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.h
index c57b29cdb1a6..b6df75622d3b 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.h
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.h
@@ -38,6 +38,8 @@ int intel_guc_wait_for_pending_msg(struct intel_guc *guc,
 				   bool interruptible,
 				   long timeout);
 
+void intel_guc_submission_flush_work(struct intel_guc *guc);
+
 static inline bool intel_guc_submission_is_supported(struct intel_guc *guc)
 {
 	return guc->submission_supported;
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc.c b/drivers/gpu/drm/i915/gt/uc/intel_uc.c
index 98b103375b7a..eb3554cb5ea4 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_uc.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_uc.c
@@ -693,6 +693,8 @@ void intel_uc_suspend(struct intel_uc *uc)
 		return;
 	}
 
+	intel_guc_submission_flush_work(guc);
+
 	with_intel_runtime_pm(&uc_to_gt(uc)->i915->runtime_pm, wakeref) {
 		err = intel_guc_suspend(guc);
 		if (err)
-- 
2.39.0