netdev - [PATCH net-next 4/6] net: sparx5: move SKB consumption to xmit()

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Message-ID: <20250109-sparx5-lan969x-switch-driver-5-v1-4-13d6d8451e63@microchip.com>
Date: Thu, 9 Jan 2025 19:37:56 +0100
From: Daniel Machon <daniel.machon@...rochip.com>
To: "David S. Miller" <davem@...emloft.net>, Eric Dumazet
	<edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni
	<pabeni@...hat.com>, Simon Horman <horms@...nel.org>, Andrew Lunn
	<andrew+netdev@...n.ch>, Lars Povlsen <lars.povlsen@...rochip.com>, "Steen
 Hegelund" <Steen.Hegelund@...rochip.com>, <UNGLinuxDriver@...rochip.com>,
	Richard Cochran <richardcochran@...il.com>,
	<jensemil.schulzostergaard@...rochip.com>, <horatiu.vultur@...rochip.com>,
	<jacob.e.keller@...el.com>
CC: <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>
Subject: [PATCH net-next 4/6] net: sparx5: move SKB consumption to xmit()

Currently, SKB's are consumed in sparx5_port_xmit_impl(), if the FDMA
xmit() function returns NETDEV_TX_OK. In a following commit, we will ops
out the xmit() function for lan969x support, and since lan969x is going
to consume SKB's asynchronously, in the NAPI poll loop, we cannot
consume SKB's in sparx5_port_xmit_impl() anymore. Therefore, move the
call of dev_consume_skb_any() to the xmit() function.

Reviewed-by: Steen Hegelund <Steen.Hegelund@...rochip.com>
Signed-off-by: Daniel Machon <daniel.machon@...rochip.com>
---
 drivers/net/ethernet/microchip/sparx5/sparx5_fdma.c   | 2 ++
 drivers/net/ethernet/microchip/sparx5/sparx5_packet.c | 1 -
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_fdma.c b/drivers/net/ethernet/microchip/sparx5/sparx5_fdma.c
index fdae62f557ce..cb78acd356d2 100644
--- a/drivers/net/ethernet/microchip/sparx5/sparx5_fdma.c
+++ b/drivers/net/ethernet/microchip/sparx5/sparx5_fdma.c
@@ -239,6 +239,8 @@ int sparx5_fdma_xmit(struct sparx5 *sparx5, u32 *ifh, struct sk_buff *skb)
 
 	sparx5_fdma_reload(sparx5, fdma);
 
+	dev_consume_skb_any(skb);
+
 	return NETDEV_TX_OK;
 }
 
diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_packet.c b/drivers/net/ethernet/microchip/sparx5/sparx5_packet.c
index b6f635d85820..e776fa0845c6 100644
--- a/drivers/net/ethernet/microchip/sparx5/sparx5_packet.c
+++ b/drivers/net/ethernet/microchip/sparx5/sparx5_packet.c
@@ -272,7 +272,6 @@ netdev_tx_t sparx5_port_xmit_impl(struct sk_buff *skb, struct net_device *dev)
 	    SPARX5_SKB_CB(skb)->rew_op == IFH_REW_OP_TWO_STEP_PTP)
 		return NETDEV_TX_OK;
 
-	dev_consume_skb_any(skb);
 	return NETDEV_TX_OK;
 drop:
 	stats->tx_dropped++;

-- 
2.34.1