Do explicity cleanup on router_hw_fini, to ensure, that all allocated
objects cleaned. This will be used in cases, when upper layer (cache) is not
mapped to router_hw layer.

Co-developed-by: Taras Chornyi <tchornyi@marvell.com>
Signed-off-by: Taras Chornyi <tchornyi@marvell.com>
Co-developed-by: Oleksandr Mazur <oleksandr.mazur@plvision.eu>
Signed-off-by: Oleksandr Mazur <oleksandr.mazur@plvision.eu>
Signed-off-by: Yevhen Orlov <yevhen.orlov@plvision.eu>
---
 .../marvell/prestera/prestera_router_hw.c     | 23 +++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/drivers/net/ethernet/marvell/prestera/prestera_router_hw.c b/drivers/net/ethernet/marvell/prestera/prestera_router_hw.c
index b5407bb88d51..407f465f7562 100644
--- a/drivers/net/ethernet/marvell/prestera/prestera_router_hw.c
+++ b/drivers/net/ethernet/marvell/prestera/prestera_router_hw.c
@@ -57,6 +57,7 @@ static int prestera_nexthop_group_set(struct prestera_switch *sw,
 static bool
 prestera_nexthop_group_util_hw_state(struct prestera_switch *sw,
 				     struct prestera_nexthop_group *nh_grp);
+static void prestera_fib_node_destroy_ht(struct prestera_switch *sw);
 
 /* TODO: move to router.h as macros */
 static bool prestera_nh_neigh_key_is_valid(struct prestera_nh_neigh_key *key)
@@ -98,6 +99,7 @@ int prestera_router_hw_init(struct prestera_switch *sw)
 
 void prestera_router_hw_fini(struct prestera_switch *sw)
 {
+	prestera_fib_node_destroy_ht(sw);
 	WARN_ON(!list_empty(&sw->router->vr_list));
 	WARN_ON(!list_empty(&sw->router->rif_entry_list));
 	rhashtable_destroy(&sw->router->fib_ht);
@@ -606,6 +608,27 @@ void prestera_fib_node_destroy(struct prestera_switch *sw,
 	kfree(fib_node);
 }
 
+static void prestera_fib_node_destroy_ht(struct prestera_switch *sw)
+{
+	struct prestera_fib_node *node;
+	struct rhashtable_iter iter;
+
+	while (1) {
+		rhashtable_walk_enter(&sw->router->fib_ht, &iter);
+		rhashtable_walk_start(&iter);
+		node = rhashtable_walk_next(&iter);
+		rhashtable_walk_stop(&iter);
+		rhashtable_walk_exit(&iter);
+
+		if (!node)
+			break;
+		else if (IS_ERR(node))
+			continue;
+		else if (node)
+			prestera_fib_node_destroy(sw, node);
+	}
+}
+
 struct prestera_fib_node *
 prestera_fib_node_create(struct prestera_switch *sw,
 			 struct prestera_fib_key *key,
-- 
2.17.1