From 88631864da093377ce6d5e60b5639328622a8e5c Mon Sep 17 00:00:00 2001 From: Florian Fainelli Date: Mon, 30 Mar 2020 14:38:48 -0700 Subject: net: dsa: b53: Prevent tagged VLAN on port 7 for 7278 On 7278, port 7 of the switch connects to the ASP UniMAC which is not capable of processing VLAN tagged frames. We can still allow the port to be part of a VLAN entry, and we may want it to be untagged on egress on that VLAN because of that limitation. Signed-off-by: Florian Fainelli Signed-off-by: David S. Miller --- drivers/net/dsa/b53/b53_common.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'drivers/net') diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c index 5cb678e8b9cd..42c41b091682 100644 --- a/drivers/net/dsa/b53/b53_common.c +++ b/drivers/net/dsa/b53/b53_common.c @@ -1355,6 +1355,14 @@ int b53_vlan_prepare(struct dsa_switch *ds, int port, if ((is5325(dev) || is5365(dev)) && vlan->vid_begin == 0) return -EOPNOTSUPP; + /* Port 7 on 7278 connects to the ASP's UniMAC which is not capable of + * receiving VLAN tagged frames at all, we can still allow the port to + * be configured for egress untagged. + */ + if (dev->chip_id == BCM7278_DEVICE_ID && port == 7 && + !(vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED)) + return -EINVAL; + if (vlan->vid_end > dev->num_vlans) return -ERANGE; -- cgit v1.2.3