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[net-next,v9,01/16] net: dsa: allow port_bridge_join() to override extack message

Message ID 20220624144001.95518-2-clement.leger@bootlin.com (mailing list archive)
State Accepted
Delegated to: Geert Uytterhoeven
Headers show
Series add support for Renesas RZ/N1 ethernet subsystem devices | expand

Commit Message

Clément Léger June 24, 2022, 2:39 p.m. UTC 
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.

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

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);