From: Christian König Date: Fri, 10 Dec 2021 08:39:27 +0000 (+0100) Subject: drm/amdgpu: fix dropped backing store handling in amdgpu_dma_buf_move_notify X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=31d95ff41cdfcc49c21226bc1f60b3c96a44b6a6;p=linux.git drm/amdgpu: fix dropped backing store handling in amdgpu_dma_buf_move_notify [ Upstream commit fc74881c28d314b10efac016ef49df4ff40b8b97 ] bo->tbo.resource can now be NULL. Signed-off-by: Christian König Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1811 Acked-by: Alex Deucher Link: https://patchwork.freedesktop.org/patch/msgid/20211210083927.1754-1-christian.koenig@amd.com Signed-off-by: Sasha Levin --- diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c index ae6ab93c868b8..7444484a12bf8 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c @@ -384,7 +384,7 @@ amdgpu_dma_buf_move_notify(struct dma_buf_attachment *attach) struct amdgpu_vm_bo_base *bo_base; int r; - if (bo->tbo.resource->mem_type == TTM_PL_SYSTEM) + if (!bo->tbo.resource || bo->tbo.resource->mem_type == TTM_PL_SYSTEM) return; r = ttm_bo_validate(&bo->tbo, &placement, &ctx);