Since we removed the context lock we need to make sure that not two threads
are trying to install an entity at the same time.
Signed-off-by: NChristian König <christian.koenig@amd.com>
Fixes: 461fa7b0 ("drm/amdgpu: remove ctx->lock")
Reviewed-by: NAndrey Grodzovsky <andrey.grodzovsky@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>