ipv4: Fix data-races around sysctl_fib_multipath_hash_fields.

[platform/kernel/linux-rpi.git] / drivers / net / ethernet / mellanox / mlxsw / spectrum_router.c

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
index de63a5f..85aa1c4 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
@@ -10342,7 +10342,7 @@ static void mlxsw_sp_mp4_hash_init(struct mlxsw_sp *mlxsw_sp,
                mlxsw_sp_mp_hash_inner_l3(config);
                break;
        case 3:
-               hash_fields = net->ipv4.sysctl_fib_multipath_hash_fields;
+               hash_fields = READ_ONCE(net->ipv4.sysctl_fib_multipath_hash_fields);
                /* Outer */
                MLXSW_SP_MP_HASH_HEADER_SET(headers, IPV4_EN_NOT_TCP_NOT_UDP);
                MLXSW_SP_MP_HASH_HEADER_SET(headers, IPV4_EN_TCP_UDP);