Re: [PATCH] xen-netfront: handle NULL returned by xdp_convert_buff_to_frame()

From: Alexey
Date: Thu Apr 17 2025 - 03:02:42 EST



On 17.04.2025 03:58, Jakub Kicinski wrote:
On Mon, 14 Apr 2025 18:34:01 +0000 Alexey Nepomnyashih wrote:
get_page(pdata);
Please notice this get_page() here.

xdpf = xdp_convert_buff_to_frame(xdp);
+ if (unlikely(!xdpf)) {
+ trace_xdp_exception(queue->info->netdev, prog, act);
+ break;
+ }
Do you mean that it would be better to move the get_page(pdata) call lower,
after checking for NULL in xdpf, so that the reference count is only increased
after a successful conversion?