The "trailer" 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.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
 net/dsa/tag_trailer.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/net/dsa/tag_trailer.c b/net/dsa/tag_trailer.c
index 22742a53d6f4..4dce24cfe6a7 100644
--- a/net/dsa/tag_trailer.c
+++ b/net/dsa/tag_trailer.c
@@ -14,12 +14,11 @@
 
 static struct sk_buff *trailer_xmit(struct sk_buff *skb, struct net_device *dev)
 {
-	struct dsa_port *dp = dsa_user_to_port(dev);
 	u8 *trailer;
 
 	trailer = skb_put(skb, 4);
 	trailer[0] = 0x80;
-	trailer[1] = 1 << dp->index;
+	trailer[1] = dsa_xmit_port_mask(skb, dev);
 	trailer[2] = 0x10;
 	trailer[3] = 0x00;
 
-- 
2.43.0