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[net-next,4/9] net: dsa: b53: Deny enslaving port 7 for 7278 into a bridge

Message ID 20200330204032.26313-5-f.fainelli@gmail.com
State New
Headers show
Series net: dsa: b53 & bcm_sf2 updates for 7278 | expand

Commit Message

Florian Fainelli March 30, 2020, 8:40 p.m. UTC
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>
---
 drivers/net/dsa/b53/b53_common.c | 6 ++++++
 1 file changed, 6 insertions(+)
diff mbox series

Patch

diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c
index 42c41b091682..68e2381694b9 100644
--- a/drivers/net/dsa/b53/b53_common.c
+++ b/drivers/net/dsa/b53/b53_common.c
@@ -1728,6 +1728,12 @@  int b53_br_join(struct dsa_switch *ds, int port, struct net_device *br)
 	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
 	 */