From 26a6befa5df79dddb1a1c464b5758de9d618ee23 Mon Sep 17 00:00:00 2001 From: Jiri Pirko Date: Thu, 31 Oct 2019 11:42:10 +0200 Subject: [PATCH] mlxsw: spectrum: Distinguish between unsplittable and split port Currently when user does split, he is not able to distinguish if the port cannot be split because it is already split, or because it cannot be split at all. Add another check for split flag to distinguish this. Also add check forbidding split when maximal width is 1. Signed-off-by: Jiri Pirko Reviewed-by: Shalom Toledo Signed-off-by: Ido Schimmel Signed-off-by: David S. Miller --- drivers/net/ethernet/mellanox/mlxsw/spectrum.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c index e0111e0a1a351..3644fca096acc 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c @@ -4118,6 +4118,13 @@ static int mlxsw_sp_port_split(struct mlxsw_core *mlxsw_core, u8 local_port, return -EINVAL; } + /* Split ports cannot be split. */ + if (mlxsw_sp_port->split) { + netdev_err(mlxsw_sp_port->dev, "Port cannot be split further\n"); + NL_SET_ERR_MSG_MOD(extack, "Port cannot be split further"); + return -EINVAL; + } + module = mlxsw_sp_port->mapping.module; max_width = mlxsw_core_module_max_width(mlxsw_core, @@ -4128,10 +4135,10 @@ static int mlxsw_sp_port_split(struct mlxsw_core *mlxsw_core, u8 local_port, return max_width; } - /* Split port with non-max module width cannot be split. */ - if (mlxsw_sp_port->mapping.width != max_width) { - netdev_err(mlxsw_sp_port->dev, "Port cannot be split further\n"); - NL_SET_ERR_MSG_MOD(extack, "Port cannot be split further"); + /* Split port with non-max and 1 module width cannot be split. */ + if (mlxsw_sp_port->mapping.width != max_width || max_width == 1) { + netdev_err(mlxsw_sp_port->dev, "Port cannot be split\n"); + NL_SET_ERR_MSG_MOD(extack, "Port cannot be split"); return -EINVAL; } -- 2.30.2