mlx4: Disable HA for SRIOV PF RoCE devices

[ Upstream commit 7254acff ]

When in HA mode, the driver exposes an IB (RoCE) device instance with only
one port. Under SRIOV, the existing implementation doesn't go well with
the PF RoCE driver's role of Special QPs Para-Virtualization, etc.

As such, disable HA for the mlx4 PF RoCE device in SRIOV mode.

Fixes: a5750090 ('IB/mlx4: Add port aggregation support')
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/net/ethernet/mellanox/mlx4/intf.c

@@ -93,8 +93,14 @@ int mlx4_register_interface(struct mlx4_interface *intf)
 	mutex_lock(&intf_mutex);
 
 	list_add_tail(&intf->list, &intf_list);
-	list_for_each_entry(priv, &dev_list, dev_list)
+	list_for_each_entry(priv, &dev_list, dev_list) {
+		if (mlx4_is_mfunc(&priv->dev) && (intf->flags & MLX4_INTFF_BONDING)) {
+			mlx4_dbg(&priv->dev,
+				 "SRIOV, disabling HA mode for intf proto %d\n", intf->protocol);
+			intf->flags &= ~MLX4_INTFF_BONDING;
+		}
 		mlx4_add_device(intf, priv);
+	}
 
 	mutex_unlock(&intf_mutex);