[PATCH net 2/2] net: ntb_netdev: Count packets dropped on RX refill failure
From: Koichiro Den <hidden>
Date: 2026-08-19 17:25:51
Also in:
lkml
Subsystem:
networking drivers, ntb driver core, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Jon Mason, Dave Jiang, Allen Hubbe, Linus Torvalds
When replacement skb allocation fails, ntb_netdev drops a packet that
was received successfully and requeues the original buffer. The drop is
counted, but rx_packets and rx_bytes are not.
Count every good packet before allocating its replacement.
Fixes: d2121faf133a ("NTB: ntb_netdev: Preserve RX queue depth on allocation failure")
Cc: stable@vger.kernel.org
Signed-off-by: Koichiro Den <redacted>
---
drivers/net/ntb_netdev.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ntb_netdev.c b/drivers/net/ntb_netdev.c
index 4e53b00f016b..5bb0c8be00f9 100644
--- a/drivers/net/ntb_netdev.c
+++ b/drivers/net/ntb_netdev.c@@ -144,6 +144,9 @@ static void ntb_netdev_rx_handler(struct ntb_transport_qp *qp, void *qp_data, goto enqueue_again; } + ndev->stats.rx_packets++; + ndev->stats.rx_bytes += len; + new_skb = netdev_alloc_skb(ndev, ndev->mtu + ETH_HLEN); if (!new_skb) { ndev->stats.rx_dropped++;
@@ -156,8 +159,6 @@ static void ntb_netdev_rx_handler(struct ntb_transport_qp *qp, void *qp_data, skb_record_rx_queue(skb, q->qid); netif_rx(skb); - ndev->stats.rx_packets++; - ndev->stats.rx_bytes += len; skb = new_skb;
--
2.51.0