From: Christian König Date: Fri, 3 Apr 2020 13:56:12 +0000 (+0200) Subject: drm/amdgpu: fix size calculation in amdgpu_ttm_copy_mem_to_mem X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=b717fa5cb1a1aae9ea744a3b61e9d9aa1d258c9c;p=linux.git drm/amdgpu: fix size calculation in amdgpu_ttm_copy_mem_to_mem When the node is larger than 4GB we overrun the size calculation. Fix this by correctly limiting the size to the window as well. Signed-off-by: Christian König Reviewed-by: Felix Kuehling Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index 0d7ad6468ef53..1296499f0f549 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -450,9 +450,9 @@ int amdgpu_ttm_copy_mem_to_mem(struct amdgpu_device *adev, /* Copy size cannot exceed GTT_MAX_BYTES. So if src or dst * begins at an offset, then adjust the size accordingly */ - cur_size = min3(src_node_size, dst_node_size, size); - cur_size = min(GTT_MAX_BYTES - src_page_offset, cur_size); - cur_size = min(GTT_MAX_BYTES - dst_page_offset, cur_size); + cur_size = max(src_page_offset, dst_page_offset); + cur_size = min(min3(src_node_size, dst_node_size, size), + (uint64_t)(GTT_MAX_BYTES - cur_size)); /* Map src to window 0 and dst to window 1. */ r = amdgpu_ttm_map_buffer(src->bo, src->mem, src_mm,