From: Pixel Ding <Pixel.Ding@amd.com>
Date: Wed, 18 Apr 2018 04:33:26 -0400
Subject: drm/scheduler: always put last_sched fence in entity_fini
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Git-commit: a4b3996aeebbaafd2682f4db06bb5659e1653da7
Patch-mainline: v4.18-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

Fix the potential memleak since scheduler main thread always
hold one last_sched fence.

Signed-off-by: Pixel Ding <Pixel.Ding@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/scheduler/gpu_scheduler.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/drivers/gpu/drm/scheduler/gpu_scheduler.c
+++ b/drivers/gpu/drm/scheduler/gpu_scheduler.c
@@ -276,10 +276,10 @@ void drm_sched_entity_cleanup(struct drm
 			else if (r)
 				DRM_ERROR("fence add callback failed (%d)\n", r);
 		}
-
-		dma_fence_put(entity->last_scheduled);
-		entity->last_scheduled = NULL;
 	}
+
+	dma_fence_put(entity->last_scheduled);
+	entity->last_scheduled = NULL;
 }
 EXPORT_SYMBOL(drm_sched_entity_cleanup);