5.15-stable review patch. If anyone has any objections, please let me know.
------------------
From: Koichiro Den <redacted>
commit 31ded341c375bb2faac1d77ab0012a732ba3e2a6 upstream.
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: <redacted>
Signed-off-by: Koichiro Den <redacted>
Link: https://patch.msgid.link/20260819172539.1450821-3-den@valinux.co.jp (local)
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/ntb_netdev.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/drivers/net/ntb_netdev.c
+++ b/drivers/net/ntb_netdev.c
@@ -115,6 +115,9 @@ static void ntb_netdev_rx_handler(struct
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++;@@ -126,8 +129,6 @@ static void ntb_netdev_rx_handler(struct
skb->ip_summed = CHECKSUM_NONE;
netif_rx(skb);
- ndev->stats.rx_packets++;
- ndev->stats.rx_bytes += len;
skb = new_skb;