net: dsa: Add support for querying supported bridge flags

The DSA drivers do not support bridge flags offload. Yet, this attribute
should be added in order for the bridge to fail when one tries set a
flag on the port, as explained in commit dc0ecabd6231 ("net: switchdev:
Add support for querying supported bridge flags by hardware").

Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 84a8694c69d0c9a58f8f7c81915f2915fca51af6..e9c1d8c5de0fb28936722202a3ca1e20ed285293 100644 (file)
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -324,6 +324,9 @@ static int dsa_slave_port_attr_get(struct net_device *dev,
                attr->u.ppid.id_len = sizeof(ds->index);
                memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len);
                break;
+       case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS_SUPPORT:
+               attr->u.brport_flags_support = 0;
+               break;
        default:
                return -EOPNOTSUPP;
        }