From cfd12c06cdceac094aab3f097cce24c279bfd43b Mon Sep 17 00:00:00 2001
From: Yangbo Lu <yangbo.lu@nxp.com>
Date: Tue, 27 Apr 2021 12:21:57 +0800
Subject: net: dsa: check tx timestamp request in core driver

Check tx timestamp request in core driver at very beginning of
dsa_skb_tx_timestamp(), so that most skbs not requiring tx
timestamp just return. And drop such checking in device drivers.

Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Tested-by: Kurt Kanzenbach <kurt@linutronix.de>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/dsa/slave.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'net/dsa/slave.c')

diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 77b33bd161b8..b2a802e9330e 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -559,6 +559,9 @@ static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p,
 	struct sk_buff *clone;
 	unsigned int type;
 
+	if (!(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP))
+		return;
+
 	type = ptp_classify_raw(skb);
 	if (type == PTP_CLASS_NONE)
 		return;
-- 
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