netdev - [PATCH net-next 03/14] mlxsw: spectrum_router: Only provide MAC address for valid nexthops

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Date:   Mon, 22 Mar 2021 17:58:44 +0200
From:   Ido Schimmel <idosch@...sch.org>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org, jiri@...dia.com,
        petrm@...dia.com, dsahern@...il.com, mlxsw@...dia.com,
        Ido Schimmel <idosch@...dia.com>
Subject: [PATCH net-next 03/14] mlxsw: spectrum_router: Only provide MAC address for valid nexthops

From: Ido Schimmel <idosch@...dia.com>

The helper returns the MAC address associated with the nexthop. It is
only valid when the nexthop forwards packets and when it is an Ethernet
nexthop. Reflect this in the checks the helper is performing.

This is not an issue because the sole caller of the function only
invokes it for such nexthops.

Signed-off-by: Ido Schimmel <idosch@...dia.com>
Reviewed-by: Petr Machata <petrm@...dia.com>
---
 drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
index 593a40aa9af8..b7358cf611c1 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
@@ -2986,7 +2986,8 @@ bool mlxsw_sp_nexthop_is_forward(const struct mlxsw_sp_nexthop *nh)
 
 unsigned char *mlxsw_sp_nexthop_ha(struct mlxsw_sp_nexthop *nh)
 {
-	if (!nh->offloaded)
+	if (nh->type != MLXSW_SP_NEXTHOP_TYPE_ETH ||
+	    !mlxsw_sp_nexthop_is_forward(nh))
 		return NULL;
 	return nh->neigh_entry->ha;
 }
-- 
2.29.2