openwrt/target/linux/mvebu/patches-5.4/013-net-mvneta-rely-on-page_pool_recycle_direct-in-mvnet.patch

From f383b2950070ce4f34e74db94f70bb565b746e97 Mon Sep 17 00:00:00 2001
From: Lorenzo Bianconi <lorenzo@kernel.org>
Date: Wed, 20 Nov 2019 16:54:17 +0200
Subject: [PATCH] net: mvneta: rely on page_pool_recycle_direct in
 mvneta_run_xdp

Rely on page_pool_recycle_direct and not on xdp_return_buff in
mvneta_run_xdp. This is a preliminary patch to limit the dma sync len
to the one strictly necessary

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/marvell/mvneta.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -2110,7 +2110,8 @@ mvneta_run_xdp(struct mvneta_port *pp, s
 		err = xdp_do_redirect(pp->dev, xdp, prog);
 		if (err) {
 			ret = MVNETA_XDP_DROPPED;
-			xdp_return_buff(xdp);
+			page_pool_recycle_direct(rxq->page_pool,
+						 virt_to_head_page(xdp->data));
 		} else {
 			ret = MVNETA_XDP_REDIR;
 		}
@@ -2119,7 +2120,8 @@ mvneta_run_xdp(struct mvneta_port *pp, s
 	case XDP_TX:
 		ret = mvneta_xdp_xmit_back(pp, xdp);
 		if (ret != MVNETA_XDP_TX)
-			xdp_return_buff(xdp);
+			page_pool_recycle_direct(rxq->page_pool,
+						 virt_to_head_page(xdp->data));
 		break;
 	default:
 		bpf_warn_invalid_xdp_action(act);