drm/amdgpu: Fix memory leak in amdgpu_ctx_mgr_entity_fini

patch dd64956 ("drm/amdgpu: Remove duplicated "context still
alive" check") removed ctx put, which will cause amdgpu_ctx_fini()
cannot be called and then cause some finished fence that added by
amdgpu_ctx_add_fence() cannot be released and cause memleak.

Fixes: dd64956 ("drm/amdgpu: Remove duplicated "context still alive" check")
Signed-off-by: Lin.Cao <[email protected]>
Reviewed-by: Tvrtko Ursulin <[email protected]>
Acked-by: Christian König <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
(cherry picked from commit 8cf6608)
Cc: [email protected]

Author: Lin.Cao

drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c

@@ -944,6 +944,7 @@ static void amdgpu_ctx_mgr_entity_fini(struct amdgpu_ctx_mgr *mgr)
 				drm_sched_entity_fini(entity);
 			}
 		}
+		kref_put(&ctx->refcount, amdgpu_ctx_fini);
 	}
 }