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 <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c
index 42c41b0..68e2381 100644
--- a/drivers/net/dsa/b53/b53_common.c
+++ b/drivers/net/dsa/b53/b53_common.c
@@ -1728,6 +1728,12 @@
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
*/
