rocker: Handle protodown notifications.

protodown can be set by user space applications like MLAG on detecting
errors on a switch port. This patch provides sample switch driver changes
for handling protodown. Rocker PHYS disables the port in response to
protodown.

Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
Signed-off-by: Andy Gospodarek <gospo@cumulusnetworks.com>
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: Wilson Kok <wkok@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/rocker/rocker.c b/drivers/net/ethernet/rocker/rocker.c
index c005167..9324283 100644 (file)
--- a/drivers/net/ethernet/rocker/rocker.c
+++ b/drivers/net/ethernet/rocker/rocker.c
@@ -4015,7 +4015,8 @@ static int rocker_port_open(struct net_device *dev)
 
        napi_enable(&rocker_port->napi_tx);
        napi_enable(&rocker_port->napi_rx);
-       rocker_port_set_enable(rocker_port, true);
+       if (!dev->proto_down)
+               rocker_port_set_enable(rocker_port, true);
        netif_start_queue(dev);
        return 0;
 
@@ -4227,6 +4228,17 @@ static int rocker_port_get_phys_port_name(struct net_device *dev,
        return err ? -EOPNOTSUPP : 0;
 }
 
+static int rocker_port_change_proto_down(struct net_device *dev,
+                                        bool proto_down)
+{
+       struct rocker_port *rocker_port = netdev_priv(dev);
+
+       if (rocker_port->dev->flags & IFF_UP)
+               rocker_port_set_enable(rocker_port, !proto_down);
+       rocker_port->dev->proto_down = proto_down;
+       return 0;
+}
+
 static const struct net_device_ops rocker_port_netdev_ops = {
        .ndo_open                       = rocker_port_open,
        .ndo_stop                       = rocker_port_stop,
@@ -4240,6 +4252,7 @@ static const struct net_device_ops rocker_port_netdev_ops = {
        .ndo_fdb_del                    = switchdev_port_fdb_del,
        .ndo_fdb_dump                   = switchdev_port_fdb_dump,
        .ndo_get_phys_port_name         = rocker_port_get_phys_port_name,
+       .ndo_change_proto_down          = rocker_port_change_proto_down,
 };
 
 /********************