From: Ido Schimmel idosch@mellanox.com
[ Upstream commit 62201c00c4679ad8f0730d6d925a5d23651dfad2 ]
In case the driver vetoes the addition of an IPv6 multipath route, the IPv6 stack will emit delete notifications for the sibling routes that were already added to the FIB trie. Since these siblings are not present in hardware, a warning will be generated.
Have the driver ignore notifications for routes it does not have.
Fixes: ebee3cad835f ("ipv6: Add IPv6 multipath notifications for add / replace") Signed-off-by: Ido Schimmel idosch@mellanox.com Acked-by: Jiri Pirko jiri@mellanox.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c @@ -5637,8 +5637,13 @@ static void mlxsw_sp_router_fib6_del(str if (mlxsw_sp_fib6_rt_should_ignore(rt)) return;
+ /* Multipath routes are first added to the FIB trie and only then + * notified. If we vetoed the addition, we will get a delete + * notification for a route we do not have. Therefore, do not warn if + * route was not found. + */ fib6_entry = mlxsw_sp_fib6_entry_lookup(mlxsw_sp, rt); - if (WARN_ON(!fib6_entry)) + if (!fib6_entry) return;
/* If not all the nexthops are deleted, then only reduce the nexthop