From 31bfc2d42cae6e8b1440fc5db3f0aba6c5d7e602 Mon Sep 17 00:00:00 2001 From: Florian Fainelli Date: Mon, 30 Mar 2020 14:38:49 -0700 Subject: [PATCH] net: dsa: b53: Deny enslaving port 7 for 7278 into a bridge On 7278, port 7 connects to the ASP which should only receive frames through the use of CFP rules, it is not desirable to have it be part of a bridge at all since that would make it pick up unwanted traffic that it may not even be able to filter or sustain. Signed-off-by: Florian Fainelli Signed-off-by: David S. Miller --- drivers/net/dsa/b53/b53_common.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/drivers/net/dsa/b53/b53_common.c +++ b/drivers/net/dsa/b53/b53_common.c @@ -1770,6 +1770,12 @@ int b53_br_join(struct dsa_switch *ds, i u16 pvlan, reg; unsigned int i; + /* On 7278, port 7 which connects to the ASP should only receive + * traffic from matching CFP rules. + */ + if (dev->chip_id == BCM7278_DEVICE_ID && port == 7) + return -EINVAL; + /* Make this port leave the all VLANs join since we will have proper * VLAN entries from now on */