[PATCH net-next v2 2/2] net: ethernet: mtk_eth_soc: use PP exclusively for XDP programs

[Elad Yifee]

PP allocations and XDP code path traversal are unnecessary
when no XDP program is loaded.
Prevent that by simply not creating the pool.
This change boosts driver performance for this use case,
allowing the CPU to handle about 13% more packets/sec.

Signed-off-by: Elad Yifee <eladwf at gmail.com>
---
 drivers/net/ethernet/mediatek/mtk_eth_soc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
index 4d0052dbe3f4..2d1a48287c73 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -2644,7 +2644,7 @@ static int mtk_rx_alloc(struct mtk_eth *eth, int ring_no, int rx_flag)
 	if (!ring->data)
 		return -ENOMEM;
 
-	if (mtk_page_pool_enabled(eth)) {
+	if (mtk_page_pool_enabled(eth) && rcu_access_pointer(eth->prog)) {
 		struct page_pool *pp;
 
 		pp = mtk_create_page_pool(eth, &ring->xdp_q, ring_no,
-- 
2.45.2