int fdt_overlay_apply()

in EmbeddedPkg/Library/FdtLib/fdt_overlay.c [866:914]

• 28 lines of code
• 6 McCabe index (conditional complexity)

int fdt_overlay_apply(void *fdt, void *fdto)
{
	uint32_t delta = fdt_get_max_phandle(fdt);
	int ret;

	FDT_CHECK_HEADER(fdt);
	FDT_CHECK_HEADER(fdto);

	ret = overlay_adjust_local_phandles(fdto, delta);
	if (ret)
		goto err;

	ret = overlay_update_local_references(fdto, delta);
	if (ret)
		goto err;

	ret = overlay_fixup_phandles(fdt, fdto);
	if (ret)
		goto err;

	ret = overlay_merge(fdt, fdto);
	if (ret)
		goto err;

	ret = overlay_symbol_update(fdt, fdto);
	if (ret)
		goto err;

	/*
	 * The overlay has been damaged, erase its magic.
	 */
	fdt_set_magic(fdto, ~0);

	return 0;

err:
	/*
	 * The overlay might have been damaged, erase its magic.
	 */
	fdt_set_magic(fdto, ~0);

	/*
	 * The base device tree might have been damaged, erase its
	 * magic.
	 */
	fdt_set_magic(fdt, ~0);

	return ret;
}