[PATCH V1 net 2/7] net: ena: Don't register memory info on XDP exchange
From: <darinzon@amazon.com>
Date: 2022-12-29 07:30:37
Subsystem:
amazon ethernet drivers, networking drivers, the rest · Maintainers:
Arthur Kiyanovski, David Arinzon, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: David Arinzon <darinzon@amazon.com>
Since the queues aren't destroyed when we only exchange XDP programs,
there's no need to re-register them again.
Fixes: 548c4940b9f1 ("net: ena: Implement XDP_TX action")
Signed-off-by: Shay Agroskin <redacted>
Signed-off-by: David Arinzon <darinzon@amazon.com>
---
drivers/net/ethernet/amazon/ena/ena_netdev.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index a95529a69cbb..6ba9b06719a0 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c@@ -512,16 +512,18 @@ static void ena_xdp_exchange_program_rx_in_range(struct ena_adapter *adapter, struct bpf_prog *prog, int first, int count) { + struct bpf_prog *old_bpf_prog; struct ena_ring *rx_ring; int i = 0; for (i = first; i < count; i++) { rx_ring = &adapter->rx_ring[i]; - xchg(&rx_ring->xdp_bpf_prog, prog); - if (prog) { + old_bpf_prog = xchg(&rx_ring->xdp_bpf_prog, prog); + + if (!old_bpf_prog && prog) { ena_xdp_register_rxq_info(rx_ring); rx_ring->rx_headroom = XDP_PACKET_HEADROOM; - } else { + } else if (old_bpf_prog && !prog) { ena_xdp_unregister_rxq_info(rx_ring); rx_ring->rx_headroom = NET_SKB_PAD; }
--
2.38.1