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Subject: [PATCH RESEND net-next v7 01/16] net: dsa: allow port_bridge_join() to override extack message
Date:   Fri, 10 Jun 2022 12:36:57 +0200
Message-Id: <20220610103712.550644-2-clement.leger@bootlin.com>
In-Reply-To: <20220610103712.550644-1-clement.leger@bootlin.com>
References: <20220610103712.550644-1-clement.leger@bootlin.com>
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Some drivers might report that they are unable to bridge ports by
returning -EOPNOTSUPP, but still wants to override extack message.
In order to do so, in dsa_slave_changeupper(), if port_bridge_join()
returns -EOPNOTSUPP, check if extack message is set and if so, do not
override it.

Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: Clément Léger <clement.leger@bootlin.com>
---
 net/dsa/slave.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 2e1ac638d135..509b98dd9954 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -2460,8 +2460,9 @@ static int dsa_slave_changeupper(struct net_device *dev,
 			if (!err)
 				dsa_bridge_mtu_normalization(dp);
 			if (err == -EOPNOTSUPP) {
-				NL_SET_ERR_MSG_MOD(extack,
-						   "Offloading not supported");
+				if (!extack->_msg)
+					NL_SET_ERR_MSG_MOD(extack,
+							   "Offloading not supported");
 				err = 0;
 			}
 			err = notifier_from_errno(err);
-- 
2.36.1