linux-kernel - [PATCH v2 net 1/3] net: enetc: remove xdp_drops statistic from enetc_xdp

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Message-Id: <20240929024506.1527828-2-wei.fang@nxp.com>
Date: Sun, 29 Sep 2024 10:45:04 +0800
From: Wei Fang <wei.fang@....com>
To: davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	claudiu.manoil@....com,
	vladimir.oltean@....com,
	ast@...nel.org,
	daniel@...earbox.net,
	hawk@...nel.org,
	john.fastabend@...il.com
Cc: linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org,
	bpf@...r.kernel.org,
	stable@...r.kernel.org,
	imx@...ts.linux.dev,
	rkannoth@...vell.com,
	maciej.fijalkowski@...el.com,
	sbhatta@...vell.com
Subject: [PATCH v2 net 1/3] net: enetc: remove xdp_drops statistic from enetc_xdp_drop()

The xdp_drops statistic indicates the number of XDP frames dropped in
the Rx direction. However, enetc_xdp_drop() is also used in XDP_TX and
XDP_REDIRECT actions. If frame loss occurs in these two actions, the
frames loss count should not be included in xdp_drops, because there
are already xdp_tx_drops and xdp_redirect_failures to count the frame
loss of these two actions, so it's better to remove xdp_drops statistic
from enetc_xdp_drop() and increase xdp_drops in XDP_DROP action.

Fixes: 7ed2bc80074e ("net: enetc: add support for XDP_TX")
Cc: stable@...r.kernel.org
Signed-off-by: Wei Fang <wei.fang@....com>
Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@...el.com>
---
v2: no changes
---
 drivers/net/ethernet/freescale/enetc/enetc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/freescale/enetc/enetc.c b/drivers/net/ethernet/freescale/enetc/enetc.c
index 032d8eadd003..56e59721ec7d 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc.c
@@ -1521,7 +1521,6 @@ static void enetc_xdp_drop(struct enetc_bdr *rx_ring, int rx_ring_first,
 				  &rx_ring->rx_swbd[rx_ring_first]);
 		enetc_bdr_idx_inc(rx_ring, &rx_ring_first);
 	}
-	rx_ring->stats.xdp_drops++;
 }
 
 static int enetc_clean_rx_ring_xdp(struct enetc_bdr *rx_ring,
@@ -1586,6 +1585,7 @@ static int enetc_clean_rx_ring_xdp(struct enetc_bdr *rx_ring,
 			fallthrough;
 		case XDP_DROP:
 			enetc_xdp_drop(rx_ring, orig_i, i);
+			rx_ring->stats.xdp_drops++;
 			break;
 		case XDP_PASS:
 			rxbd = orig_rxbd;
-- 
2.34.1