From: Ido Schimmel <idosch@mellanox.com>
Date: Sun, 12 Nov 2017 09:02:56 +0100
Subject: mlxsw: spectrum_router: Add batch neighbour deletion
Patch-mainline: v4.15-rc1
Git-commit: 63dd00fa3e524c27cc0509190084ab147ecc8ae2
References: bsc#1112374

In commit 4a3c67a6e7cd ("mlxsw: spectrum_router: Don't batch neighbour
deletion") I removed the support for batch deletion of neighbours on a
router interface (RIF) since at that time the firmware did not support
it for IPv6 neighbours.

This is now supported by the version enforced by the driver, so there is
no reason to delete neighbours one by one anymore.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c |   15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
@@ -2416,16 +2416,25 @@ static void mlxsw_sp_neigh_fini(struct m
 	rhashtable_destroy(&mlxsw_sp->router->neigh_ht);
 }
 
+static int mlxsw_sp_neigh_rif_flush(struct mlxsw_sp *mlxsw_sp,
+				    const struct mlxsw_sp_rif *rif)
+{
+	char rauht_pl[MLXSW_REG_RAUHT_LEN];
+
+	mlxsw_reg_rauht_pack(rauht_pl, MLXSW_REG_RAUHT_OP_WRITE_DELETE_ALL,
+			     rif->rif_index, rif->addr);
+	return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rauht), rauht_pl);
+}
+
 static void mlxsw_sp_neigh_rif_gone_sync(struct mlxsw_sp *mlxsw_sp,
 					 struct mlxsw_sp_rif *rif)
 {
 	struct mlxsw_sp_neigh_entry *neigh_entry, *tmp;
 
+	mlxsw_sp_neigh_rif_flush(mlxsw_sp, rif);
 	list_for_each_entry_safe(neigh_entry, tmp, &rif->neigh_list,
-				 rif_list_node) {
-		mlxsw_sp_neigh_entry_update(mlxsw_sp, neigh_entry, false);
+				 rif_list_node)
 		mlxsw_sp_neigh_entry_destroy(mlxsw_sp, neigh_entry);
-	}
 }
 
 enum mlxsw_sp_nexthop_type {