[WooCommerce 3.0] Change number of upsells on single products

wc-upsells-increase.php

add_filter( 'woocommerce_output_related_products_args', 'wc_change_number_related_products' );
 
function wc_change_number_related_products( $args ) {
 
 $args['posts_per_page'] = 1;
 $args['columns'] = 4; //change number of upsells here
 return $args;
}

As far as I know that code never worked, might had been because we use the Divi theme by Elegant Themes. Either way, we had to make our own function with this:

add_filter( 'woocommerce_upsells_total', 'wc_upsell_display_number_change', 10, 1 );
	function wc_upsell_display_number_change( $args ) {
	$limit = '12';
}

And that in my opinion seems like a much more straightforward solution, at least in our case where we can manipulate the columns with our theme. But maybe this might be something that can be built upon.