[Intel-gfx] [PATCH 17/59] drm/i915: Update i915_gpu_idle() to manage its own request

[John.C.Harrison at Intel.com]

From: John Harrison <John.C.Harrison at Intel.com>

Added explicit request creation and submission to the GPU idle code path.

For: VIZ-5115
Signed-off-by: John Harrison <John.C.Harrison at Intel.com>
Reviewed-by: Tomas Elf <tomas.elf at intel.com>
---
 drivers/gpu/drm/i915/i915_gem.c |   14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index f143d15..8677293 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -3115,11 +3115,23 @@ int i915_gpu_idle(struct drm_device *dev)
 	/* Flush everything onto the inactive list. */
 	for_each_ring(ring, dev_priv, i) {
 		if (!i915.enable_execlists) {
-			ret = i915_switch_context(ring, ring->default_context);
+			struct drm_i915_gem_request *req;
+
+			ret = i915_gem_request_alloc(ring, ring->default_context, &req);
 			if (ret)
 				return ret;
+
+			ret = i915_switch_context(req->ring, ring->default_context);
+			if (ret) {
+				i915_gem_request_cancel(req);
+				return ret;
+			}
+
+			i915_add_request_no_flush(req->ring);
 		}
 
+		WARN_ON(ring->outstanding_lazy_request);
+
 		ret = intel_ring_idle(ring);
 		if (ret)
 			return ret;
-- 
1.7.9.5