mlxsw: spectrum_buffers: Forbid changing multicast TCs' attributes

Commit e83c045e53d7 ("mlxsw: spectrum_buffers: Configure MC pool")
configured the threshold of the multicast TCs as infinite so that the
admission of multicast packets is only depended on per-switch priority
threshold.

Forbid the user from changing the thresholds of these multicast TCs and
their binding to a different pool.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c
index 3c08816..6e2b701 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c
@@ -503,6 +503,8 @@ static int mlxsw_sp_sb_prs_init(struct mlxsw_sp *mlxsw_sp,
                .min_buff = _min_buff,                  \
                .max_buff = _max_buff,                  \
                .pool_index = MLXSW_SP_SB_POOL_EGR_MC,  \
+               .freeze_pool = true,                    \
+               .freeze_thresh = true,                  \
        }
 
 static const struct mlxsw_sp_sb_cm mlxsw_sp1_sb_cms_ingress[] = {