6.6-stable review patch. If anyone has any objections, please let me know.
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From: Pierre-Eric Pelloux-Prayer pierre-eric.pelloux-prayer@amd.com
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: cb5cc4f573e1 ("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 --- drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -1495,6 +1495,7 @@ static int amdgpu_ttm_access_memory_sdma if (r) goto out;
+ mutex_lock(&adev->mman.gtt_window_lock); amdgpu_res_first(abo->tbo.resource, offset, len, &src_mm); src_addr = amdgpu_ttm_domain_start(adev, bo->resource->mem_type) + src_mm.start; @@ -1509,6 +1510,7 @@ static int amdgpu_ttm_access_memory_sdma WARN_ON(job->ibs[0].length_dw > num_dw);
fence = amdgpu_job_submit(job); + mutex_unlock(&adev->mman.gtt_window_lock);
if (!dma_fence_wait_timeout(fence, false, adev->sdma_timeout)) r = -ETIMEDOUT;