[PATCH 2/2] drm/amd/scheduler: remove fence callback when context is killed

[Chunming Zhou <david1.zhou-5C7GfCeVMHo@public.gmane.org>]

Otherwise there could be page protection.

Change-Id: I1f6c81002fb2ba21c17cdc14fdde86579b28374e
Signed-off-by: Chunming Zhou <david1.zhou@amd.com>
---
 drivers/gpu/drm/amd/scheduler/gpu_scheduler.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c
index 310904042dfc..e38d55961a9f 100644
--- a/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c
+++ b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c
@@ -243,6 +243,12 @@ void amd_sched_entity_fini(struct amd_gpu_scheduler *sched,
 			amd_sched_fence_scheduled(s_fence);
 			kcl_dma_fence_set_error(&s_fence->finished, -ESRCH);
 			amd_sched_fence_finished(s_fence);
+			if (s_fence->parent) {
+				dma_fence_remove_callback(s_fence->parent,
+							  &s_fence->cb);
+				dma_fence_put(s_fence->parent);
+				s_fence->parent = NULL;
+			}
 			dma_fence_put(&s_fence->finished);
 			sched->ops->free_job(job);
 		}
-- 
2.14.1

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