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Date:   Tue,  8 Sep 2020 02:25:56 +0300
From:   Vladimir Oltean <>
Subject: [PATCH net-next] net: dsa: don't print non-fatal MTU error if not supported

Commit 72579e14a1d3 ("net: dsa: don't fail to probe if we couldn't set
the MTU") changed, for some reason, the "err && err != -EOPNOTSUPP"
check into a simple "err". This causes the MTU warning to be printed
even for drivers that don't have the MTU operations implemented.
Fix that.

Signed-off-by: Vladimir Oltean <>
 net/dsa/slave.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 27931141d30f..4987f94a8f52 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -1784,7 +1784,7 @@ int dsa_slave_create(struct dsa_port *port)
 	ret = dsa_slave_change_mtu(slave_dev, ETH_DATA_LEN);
-	if (ret)
+	if (ret && ret != -EOPNOTSUPP)
 		dev_warn(ds->dev, "nonfatal error %d setting MTU on port %d\n",
 			 ret, port->index);

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