netdev - [PATCH net-next v1 4/4] net: lan966x: generate software timestamp just before the doorbell

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Message-Id: <20250508033328.12507-5-kerneljasonxing@gmail.com>
Date: Thu,  8 May 2025 11:33:28 +0800
From: Jason Xing <kerneljasonxing@...il.com>
To: irusskikh@...vell.com,
	andrew+netdev@...n.ch,
	bharat@...lsio.com,
	ayush.sawal@...lsio.com,
	horatiu.vultur@...rochip.com,
	UNGLinuxDriver@...rochip.com,
	mcoquelin.stm32@...il.com,
	alexandre.torgue@...s.st.com,
	davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	horms@...nel.org,
	sgoutham@...vell.com,
	willemb@...gle.com
Cc: linux-stm32@...md-mailman.stormreply.com,
	linux-arm-kernel@...ts.infradead.org,
	netdev@...r.kernel.org,
	Jason Xing <kernelxing@...cent.com>
Subject: [PATCH net-next v1 4/4] net: lan966x: generate software timestamp just before the doorbell

From: Jason Xing <kernelxing@...cent.com>

Make sure the call of skb_tx_timestamp as close to the doorbell.

Signed-off-by: Jason Xing <kernelxing@...cent.com>
---
 drivers/net/ethernet/microchip/lan966x/lan966x_fdma.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_fdma.c b/drivers/net/ethernet/microchip/lan966x/lan966x_fdma.c
index 502670718104..e030f23e5145 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_fdma.c
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_fdma.c
@@ -730,7 +730,6 @@ int lan966x_fdma_xmit(struct sk_buff *skb, __be32 *ifh, struct net_device *dev)
 		}
 	}
 
-	skb_tx_timestamp(skb);
 	skb_push(skb, IFH_LEN_BYTES);
 	memcpy(skb->data, ifh, IFH_LEN_BYTES);
 	skb_put(skb, 4);
@@ -768,6 +767,7 @@ int lan966x_fdma_xmit(struct sk_buff *skb, __be32 *ifh, struct net_device *dev)
 		next_dcb_buf->ptp = true;
 
 	/* Start the transmission */
+	skb_tx_timestamp(skb);
 	lan966x_fdma_tx_start(tx);
 
 	return NETDEV_TX_OK;
-- 
2.43.5