From: Ido Schimmel <idosch@mellanox.com>
Date: Thu, 2 Nov 2017 17:14:06 +0100
Subject: mlxsw: spectrum_router: Embed netevent notifier block in router
 struct
Patch-mainline: v4.15-rc1
Git-commit: 48fac8852637f00abcb05b1af3489e3cd45cda58
References: bsc#1112374

We are going to need to respond to netevents notifying us about
multipath hash updates by configuring the device's hash parameters.

Embed the netevent notifier in the router struct so that we could
retrieve it upon notifications and use it to configure the device.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Petr Machata <petrm@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.c        |    7 -------
 drivers/net/ethernet/mellanox/mlxsw/spectrum.h        |    2 --
 drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c |   14 ++++++++++++--
 3 files changed, 12 insertions(+), 11 deletions(-)

--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
@@ -4574,10 +4574,6 @@ static struct notifier_block mlxsw_sp_in
 	.notifier_call = mlxsw_sp_inet6addr_event,
 };
 
-static struct notifier_block mlxsw_sp_router_netevent_nb __read_mostly = {
-	.notifier_call = mlxsw_sp_router_netevent_event,
-};
-
 static const struct pci_device_id mlxsw_sp_pci_id_table[] = {
 	{PCI_VDEVICE(MELLANOX, PCI_DEVICE_ID_MELLANOX_SPECTRUM), 0},
 	{0, },
@@ -4596,7 +4592,6 @@ static int __init mlxsw_sp_module_init(v
 	register_inetaddr_notifier(&mlxsw_sp_inetaddr_nb);
 	register_inet6addr_validator_notifier(&mlxsw_sp_inet6addr_valid_nb);
 	register_inet6addr_notifier(&mlxsw_sp_inet6addr_nb);
-	register_netevent_notifier(&mlxsw_sp_router_netevent_nb);
 
 	err = mlxsw_core_driver_register(&mlxsw_sp_driver);
 	if (err)
@@ -4611,7 +4606,6 @@ static int __init mlxsw_sp_module_init(v
 err_pci_driver_register:
 	mlxsw_core_driver_unregister(&mlxsw_sp_driver);
 err_core_driver_register:
-	unregister_netevent_notifier(&mlxsw_sp_router_netevent_nb);
 	unregister_inet6addr_notifier(&mlxsw_sp_inet6addr_nb);
 	unregister_inet6addr_validator_notifier(&mlxsw_sp_inet6addr_valid_nb);
 	unregister_inetaddr_notifier(&mlxsw_sp_inetaddr_nb);
@@ -4623,7 +4617,6 @@ static void __exit mlxsw_sp_module_exit(
 {
 	mlxsw_pci_driver_unregister(&mlxsw_sp_pci_driver);
 	mlxsw_core_driver_unregister(&mlxsw_sp_driver);
-	unregister_netevent_notifier(&mlxsw_sp_router_netevent_nb);
 	unregister_inet6addr_notifier(&mlxsw_sp_inet6addr_nb);
 	unregister_inet6addr_validator_notifier(&mlxsw_sp_inet6addr_valid_nb);
 	unregister_inetaddr_notifier(&mlxsw_sp_inetaddr_nb);
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
@@ -385,8 +385,6 @@ static inline void mlxsw_sp_port_dcb_fin
 /* spectrum_router.c */
 int mlxsw_sp_router_init(struct mlxsw_sp *mlxsw_sp);
 void mlxsw_sp_router_fini(struct mlxsw_sp *mlxsw_sp);
-int mlxsw_sp_router_netevent_event(struct notifier_block *unused,
-				   unsigned long event, void *ptr);
 int mlxsw_sp_netdevice_router_port_event(struct net_device *dev);
 int mlxsw_sp_inetaddr_event(struct notifier_block *unused,
 			    unsigned long event, void *ptr);
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
@@ -96,6 +96,7 @@ struct mlxsw_sp_router {
 	struct list_head ipip_list;
 	bool aborted;
 	struct notifier_block fib_nb;
+	struct notifier_block netevent_nb;
 	const struct mlxsw_sp_rif_ops **rif_ops_arr;
 	const struct mlxsw_sp_ipip_ops **ipip_ops_arr;
 };
@@ -2076,8 +2077,8 @@ out:
 	kfree(neigh_work);
 }
 
-int mlxsw_sp_router_netevent_event(struct notifier_block *unused,
-				   unsigned long event, void *ptr)
+static int mlxsw_sp_router_netevent_event(struct notifier_block *unused,
+					  unsigned long event, void *ptr)
 {
 	struct mlxsw_sp_neigh_event_work *neigh_work;
 	struct mlxsw_sp_port *mlxsw_sp_port;
@@ -6720,6 +6721,12 @@ int mlxsw_sp_router_init(struct mlxsw_sp
 	if (err)
 		goto err_neigh_init;
 
+	mlxsw_sp->router->netevent_nb.notifier_call =
+		mlxsw_sp_router_netevent_event;
+	err = register_netevent_notifier(&mlxsw_sp->router->netevent_nb);
+	if (err)
+		goto err_register_netevent_notifier;
+
 	mlxsw_sp->router->fib_nb.notifier_call = mlxsw_sp_router_fib_event;
 	err = register_fib_notifier(&mlxsw_sp->router->fib_nb,
 				    mlxsw_sp_router_fib_dump_flush);
@@ -6729,6 +6736,8 @@ int mlxsw_sp_router_init(struct mlxsw_sp
 	return 0;
 
 err_register_fib_notifier:
+	unregister_netevent_notifier(&mlxsw_sp->router->netevent_nb);
+err_register_netevent_notifier:
 	mlxsw_sp_neigh_fini(mlxsw_sp);
 err_neigh_init:
 	mlxsw_sp_vrs_fini(mlxsw_sp);
@@ -6754,6 +6763,7 @@ err_router_init:
 void mlxsw_sp_router_fini(struct mlxsw_sp *mlxsw_sp)
 {
 	unregister_fib_notifier(&mlxsw_sp->router->fib_nb);
+	unregister_netevent_notifier(&mlxsw_sp->router->netevent_nb);
 	mlxsw_sp_neigh_fini(mlxsw_sp);
 	mlxsw_sp_vrs_fini(mlxsw_sp);
 	mlxsw_sp_mr_fini(mlxsw_sp);