drm/amdgpu: fix size calculation in amdgpu_ttm_copy_mem_to_mem (b717fa5c) · Commits · 戴 / test

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:

drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c

+3 −3

Original line number	Diff line number	Diff line
		@@ -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,