netdev - [PATCH net-next 06/15] net: dsa: tag_mtk: use the dsa_xmit_port

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Message-ID: <20251127120902.292555-7-vladimir.oltean@nxp.com>
Date: Thu, 27 Nov 2025 14:08:53 +0200
From: Vladimir Oltean <vladimir.oltean@....com>
To: netdev@...r.kernel.org
Cc: Andrew Lunn <andrew@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Daniel Golle <daniel@...rotopia.org>,
	DENG Qingfang <dqfext@...il.com>,
	Sean Wang <sean.wang@...iatek.com>
Subject: [PATCH net-next 06/15] net: dsa: tag_mtk: use the dsa_xmit_port_mask() helper

The "mtk" tagging protocol populates a bit mask for the TX ports, so we
can use dsa_xmit_port_mask() to centralize the decision of how to set
that field.

Cc: Chester A. Unal" <chester.a.unal@...nc9.com>
Cc: Daniel Golle <daniel@...rotopia.org>
Cc: DENG Qingfang <dqfext@...il.com>
Cc: Sean Wang <sean.wang@...iatek.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
---
 net/dsa/tag_mtk.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/dsa/tag_mtk.c b/net/dsa/tag_mtk.c
index b670e3c53e91..dea3eecaf093 100644
--- a/net/dsa/tag_mtk.c
+++ b/net/dsa/tag_mtk.c
@@ -54,7 +54,8 @@ static struct sk_buff *mtk_tag_xmit(struct sk_buff *skb,
 	 * whether that's a combined special tag with 802.1Q header.
 	 */
 	mtk_tag[0] = xmit_tpid;
-	mtk_tag[1] = (1 << dp->index) & MTK_HDR_XMIT_DP_BIT_MASK;
+	mtk_tag[1] = FIELD_PREP(MTK_HDR_XMIT_DP_BIT_MASK,
+				dsa_xmit_port_mask(skb, dev));
 
 	/* Tag control information is kept for 802.1Q */
 	if (xmit_tpid == MTK_HDR_XMIT_UNTAGGED) {
-- 
2.43.0