From: Chunming Zhou <david1.zhou@amd.com>
Date: Tue, 7 Nov 2017 02:40:00 +0000 (+0800)
Subject: drm/amd/scheduler: fix page protection of cb
X-Git-Tag: v4.19~1610^2~33^2~201
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f4323bccd17bca85f9ed10c85ed85bdd6c0b431a;p=platform%2Fkernel%2Flinux-rpi3.git

drm/amd/scheduler: fix page protection of cb

We must remove the fence callback.

Signed-off-by: Chunming Zhou <david1.zhou@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c
index 53ea7e1..9e3748a 100644
--- a/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c
+++ b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c
@@ -229,6 +229,13 @@ void amd_sched_entity_fini(struct amd_gpu_scheduler *sched,
 		 */
 		kthread_park(sched->thread);
 		kthread_unpark(sched->thread);
+		if (entity->dependency) {
+			dma_fence_remove_callback(entity->dependency,
+						  &entity->cb);
+			dma_fence_put(entity->dependency);
+			entity->dependency = NULL;
+		}
+
 		while ((job = to_amd_sched_job(spsc_queue_pop(&entity->job_queue)))) {
 			struct amd_sched_fence *s_fence = job->s_fence;
 			amd_sched_fence_scheduled(s_fence);