mlxsw: spectrum_router: Extract a helper to free a RIF

Right now freeing the object that mlxsw uses to keep track of a RIF is as
simple as calling a kfree. But later on as CRIF abstraction is brought in,
it will involve severing the link between CRIF and its RIF as well. Better
to have the logic encapsulated in a helper.

Since a helper is being introduced, make it a full-fledged destructor and
have it validate that the objects tracked at the RIF have been released.

Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Amit Cohen <amcohen@nvidia.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
index e05c475..1e05ecd 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
@@ -7903,6 +7903,13 @@ static struct mlxsw_sp_rif *mlxsw_sp_rif_alloc(size_t rif_size, u16 rif_index,
        return rif;
 }
 
+static void mlxsw_sp_rif_free(struct mlxsw_sp_rif *rif)
+{
+       WARN_ON(!list_empty(&rif->neigh_list));
+       WARN_ON(!list_empty(&rif->nexthop_list));
+       kfree(rif);
+}
+
 struct mlxsw_sp_rif *mlxsw_sp_rif_by_index(const struct mlxsw_sp *mlxsw_sp,
                                           u16 rif_index)
 {
@@ -8209,7 +8216,7 @@ err_configure:
 err_fid_get:
        mlxsw_sp->router->rifs[rif_index] = NULL;
        dev_put(params->dev);
-       kfree(rif);
+       mlxsw_sp_rif_free(rif);
 err_rif_alloc:
        mlxsw_sp_rif_index_free(mlxsw_sp, rif_index, rif_entries);
 err_rif_index_alloc:
@@ -8249,7 +8256,7 @@ static void mlxsw_sp_rif_destroy(struct mlxsw_sp_rif *rif)
                mlxsw_sp_fid_put(fid);
        mlxsw_sp->router->rifs[rif->rif_index] = NULL;
        dev_put(dev);
-       kfree(rif);
+       mlxsw_sp_rif_free(rif);
        mlxsw_sp_rif_index_free(mlxsw_sp, rif_index, rif_entries);
        vr->rif_count--;
        mlxsw_sp_vr_put(mlxsw_sp, vr);
@@ -9902,7 +9909,7 @@ mlxsw_sp_ul_rif_create(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_vr *vr,
 
 ul_rif_op_err:
        mlxsw_sp->router->rifs[rif_index] = NULL;
-       kfree(ul_rif);
+       mlxsw_sp_rif_free(ul_rif);
 err_rif_alloc:
        mlxsw_sp_rif_index_free(mlxsw_sp, rif_index, rif_entries);
        return ERR_PTR(err);
@@ -9917,7 +9924,7 @@ static void mlxsw_sp_ul_rif_destroy(struct mlxsw_sp_rif *ul_rif)
        atomic_sub(rif_entries, &mlxsw_sp->router->rifs_count);
        mlxsw_sp_rif_ipip_lb_ul_rif_op(ul_rif, false);
        mlxsw_sp->router->rifs[ul_rif->rif_index] = NULL;
-       kfree(ul_rif);
+       mlxsw_sp_rif_free(ul_rif);
        mlxsw_sp_rif_index_free(mlxsw_sp, rif_index, rif_entries);
 }