[PATCH net-next 3/6] net: mvneta: update mb bit before passing the xdp buffer to eBPF layer

[Lorenzo Bianconi]

Update multi-buffer bit (mb) in xdp_buff to notify XDP/eBPF layer and
XDP remote drivers if this is a "non-linear" XDP buffer

Signed-off-by: Lorenzo Bianconi <lore...@kernel.org>
---
 drivers/net/ethernet/marvell/mvneta.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/marvell/mvneta.c 
b/drivers/net/ethernet/marvell/mvneta.c
index 832bbb8b05c8..36a3defa63fa 100644
--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -2170,11 +2170,14 @@ mvneta_run_xdp(struct mvneta_port *pp, struct 
mvneta_rx_queue *rxq,
               struct bpf_prog *prog, struct xdp_buff *xdp,
               u32 frame_sz, struct mvneta_stats *stats)
 {
+       struct skb_shared_info *sinfo = xdp_get_shared_info_from_buff(xdp);
        unsigned int len, data_len, sync;
        u32 ret, act;
 
        len = xdp->data_end - xdp->data_hard_start - pp->rx_offset_correction;
        data_len = xdp->data_end - xdp->data;
+
+       xdp->mb = !!sinfo->nr_frags;
        act = bpf_prog_run_xdp(prog, xdp);
 
        /* Due xdp_adjust_tail: DMA sync for_device cover max len CPU touch */
-- 
2.26.2