static int overlay_get_target()

in EmbeddedPkg/Library/FdtLib/fdt_overlay.c [103:145]

• 25 lines of code
• 9 McCabe index (conditional complexity)

static int overlay_get_target(const void *fdt, const void *fdto,
			      int fragment, char const **pathp)
{
	uint32_t phandle;
	const char *path = NULL;
	int path_len = 0, ret;

	/* Try first to do a phandle based lookup */
	phandle = overlay_get_target_phandle(fdto, fragment);
	if (phandle == (uint32_t)-1)
		return -FDT_ERR_BADPHANDLE;

	/* no phandle, try path */
	if (!phandle) {
		/* And then a path based lookup */
		path = fdt_getprop(fdto, fragment, "target-path", &path_len);
		if (path)
			ret = fdt_path_offset(fdt, path);
		else
			ret = path_len;
	} else
		ret = fdt_node_offset_by_phandle(fdt, phandle);

	/*
	* If we haven't found either a target or a
	* target-path property in a node that contains a
	* __overlay__ subnode (we wouldn't be called
	* otherwise), consider it a improperly written
	* overlay
	*/
	if (ret < 0 && path_len == -FDT_ERR_NOTFOUND)
		ret = -FDT_ERR_BADOVERLAY;

	/* return on error */
	if (ret < 0)
		return ret;

	/* return pointer to path (if available) */
	if (pathp)
		*pathp = path ? path : NULL;

	return ret;
}