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

   1 From f383b2950070ce4f34e74db94f70bb565b746e97 Mon Sep 17 00:00:00 2001
   2 From: Lorenzo Bianconi <lorenzo@kernel.org>
   3 Date: Wed, 20 Nov 2019 16:54:17 +0200
   4 Subject: [PATCH] net: mvneta: rely on page_pool_recycle_direct in
   5  mvneta_run_xdp
   6
   7 Rely on page_pool_recycle_direct and not on xdp_return_buff in
   8 mvneta_run_xdp. This is a preliminary patch to limit the dma sync len
   9 to the one strictly necessary
  10
  11 Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
  12 Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
  13 Signed-off-by: David S. Miller <davem@davemloft.net>
  14 ---
  15  drivers/net/ethernet/marvell/mvneta.c | 6 ++++--
  16  1 file changed, 4 insertions(+), 2 deletions(-)
  17
  18 --- a/drivers/net/ethernet/marvell/mvneta.c
  19 +++ b/drivers/net/ethernet/marvell/mvneta.c
  20 @@ -2110,7 +2110,8 @@ mvneta_run_xdp(struct mvneta_port *pp, s
  21                 err = xdp_do_redirect(pp->dev, xdp, prog);
  22                 if (err) {
  23                         ret = MVNETA_XDP_DROPPED;
  24 -                       xdp_return_buff(xdp);
  25 +                       page_pool_recycle_direct(rxq->page_pool,
  26 +                                                virt_to_head_page(xdp->data));
  27                 } else {
  28                         ret = MVNETA_XDP_REDIR;
  29                 }
  30 @@ -2119,7 +2120,8 @@ mvneta_run_xdp(struct mvneta_port *pp, s
  31         case XDP_TX:
  32                 ret = mvneta_xdp_xmit_back(pp, xdp);
  33                 if (ret != MVNETA_XDP_TX)
  34 -                       xdp_return_buff(xdp);
  35 +                       page_pool_recycle_direct(rxq->page_pool,
  36 +                                                virt_to_head_page(xdp->data));
  37                 break;
  38         default:
  39                 bpf_warn_invalid_xdp_action(act);