netdev - [PATCH net-next] net: lan966x: allow offloading timestamp operations to the PHY

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Date:   Mon, 7 Mar 2022 10:46:32 +0100
From:   Horatiu Vultur <horatiu.vultur@...rochip.com>
To:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <UNGLinuxDriver@...rochip.com>, <davem@...emloft.net>,
        <kuba@...nel.org>, Horatiu Vultur <horatiu.vultur@...rochip.com>
Subject: [PATCH net-next] net: lan966x: allow offloading timestamp operations to the PHY

In case the MAC is using 'netif_rx()' to deliver the skb up the network
stack, it needs to check whether 'skb_defer_rx_timestmap()' is necessary
or not. In case is needed then don't call 'netif_rx()'

Signed-off-by: Horatiu Vultur <horatiu.vultur@...rochip.com>
---
 drivers/net/ethernet/microchip/lan966x/lan966x_main.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_main.c b/drivers/net/ethernet/microchip/lan966x/lan966x_main.c
index ad310c95bf5c..750f2cc2f695 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_main.c
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_main.c
@@ -600,7 +600,9 @@ static irqreturn_t lan966x_xtr_irq_handler(int irq, void *args)
 				skb->offload_fwd_mark = 0;
 		}
 
-		netif_rx(skb);
+		if (!skb_defer_rx_timestamp(skb))
+			netif_rx(skb);
+
 		dev->stats.rx_bytes += len;
 		dev->stats.rx_packets++;
 
-- 
2.33.0