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commit 4fa944255be521b1bbd9780383f77206303a3a5c upstream.
Users of ttm entities need to hold the gtt_window_lock before using them
to guarantee proper ordering of jobs.
Cc: stable@vger.kernel.org
Fixes: cb5cc4f573 ("drm/amdgpu: improve debug VRAM access performance using sdma")
Signed-off-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>