From 57225e7720ac3d7ffcb0086c716753abf6e54e8d Mon Sep 17 00:00:00 2001
From: Scott Feldman <sfeldma@gmail.com>
Date: Thu, 11 Jun 2015 08:19:01 -0700
Subject: switchdev: fix BUG when port driver doesn't support set attr op

Fix a BUG_ON() where CONFIG_NET_SWITCHDEV is set but the driver for a
bridged port does not support switchdev_port_attr_set op.  Don't BUG_ON()
if -EOPNOTSUPP is returned.

Also change BUG_ON() to netdev_err since this is a normal error path and
does not warrant the use of BUG_ON(), which is reserved for unrecoverable
errs.

Signed-off-by: Scott Feldman <sfeldma@gmail.com>
Reported-by: Brenden Blanco <bblanco@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c
index b683e89..658bc3a 100644
--- a/net/switchdev/switchdev.c
+++ b/net/switchdev/switchdev.c
@@ -103,7 +103,9 @@ static void switchdev_port_attr_set_work(struct work_struct *work)
 
 	rtnl_lock();
 	err = switchdev_port_attr_set(asw->dev, &asw->attr);
-	BUG_ON(err);
+	if (err && err != -EOPNOTSUPP)
+		netdev_err(asw->dev, "failed (err=%d) to set attribute (id=%d)\n",
+			   err, asw->attr.id);
 	rtnl_unlock();
 
 	dev_put(asw->dev);
-- 
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