netdev - [PATCH net-next v3 4/6] mlxsw: spectrum: Register SPAN before switchdev

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Date:   Sun, 29 Apr 2018 10:56:11 +0300
From:   Ido Schimmel <idosch@...lanox.com>
To:     netdev@...r.kernel.org, bridge@...ts.linux-foundation.org
Cc:     davem@...emloft.net, jiri@...lanox.com, petrm@...lanox.com,
        stephen@...workplumber.org, nikolay@...ulusnetworks.com,
        mlxsw@...lanox.com, Ido Schimmel <idosch@...lanox.com>
Subject: [PATCH net-next v3 4/6] mlxsw: spectrum: Register SPAN before switchdev

From: Petr Machata <petrm@...lanox.com>

Since switchdev events can trigger SPAN respin, it is necessary that the
data structures are available. Register SPAN first, with a commentary on
what the dependencies are.

Signed-off-by: Petr Machata <petrm@...lanox.com>
Signed-off-by: Ido Schimmel <idosch@...lanox.com>
---
 drivers/net/ethernet/mellanox/mlxsw/spectrum.c | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
index 7317fb8079d1..94132f6cec61 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
@@ -3666,6 +3666,15 @@ static int mlxsw_sp_init(struct mlxsw_core *mlxsw_core,
 		goto err_lag_init;
 	}
 
+	/* Initialize SPAN before router and switchdev, so that those components
+	 * can call mlxsw_sp_span_respin().
+	 */
+	err = mlxsw_sp_span_init(mlxsw_sp);
+	if (err) {
+		dev_err(mlxsw_sp->bus_info->dev, "Failed to init span system\n");
+		goto err_span_init;
+	}
+
 	err = mlxsw_sp_switchdev_init(mlxsw_sp);
 	if (err) {
 		dev_err(mlxsw_sp->bus_info->dev, "Failed to initialize switchdev\n");
@@ -3684,15 +3693,6 @@ static int mlxsw_sp_init(struct mlxsw_core *mlxsw_core,
 		goto err_afa_init;
 	}
 
-	err = mlxsw_sp_span_init(mlxsw_sp);
-	if (err) {
-		dev_err(mlxsw_sp->bus_info->dev, "Failed to init span system\n");
-		goto err_span_init;
-	}
-
-	/* Initialize router after SPAN is initialized, so that the FIB and
-	 * neighbor event handlers can issue SPAN respin.
-	 */
 	err = mlxsw_sp_router_init(mlxsw_sp);
 	if (err) {
 		dev_err(mlxsw_sp->bus_info->dev, "Failed to initialize router\n");
@@ -3739,14 +3739,14 @@ static int mlxsw_sp_init(struct mlxsw_core *mlxsw_core,
 err_netdev_notifier:
 	mlxsw_sp_router_fini(mlxsw_sp);
 err_router_init:
-	mlxsw_sp_span_fini(mlxsw_sp);
-err_span_init:
 	mlxsw_sp_afa_fini(mlxsw_sp);
 err_afa_init:
 	mlxsw_sp_counter_pool_fini(mlxsw_sp);
 err_counter_pool_init:
 	mlxsw_sp_switchdev_fini(mlxsw_sp);
 err_switchdev_init:
+	mlxsw_sp_span_fini(mlxsw_sp);
+err_span_init:
 	mlxsw_sp_lag_fini(mlxsw_sp);
 err_lag_init:
 	mlxsw_sp_buffers_fini(mlxsw_sp);
@@ -3768,10 +3768,10 @@ static void mlxsw_sp_fini(struct mlxsw_core *mlxsw_core)
 	mlxsw_sp_acl_fini(mlxsw_sp);
 	unregister_netdevice_notifier(&mlxsw_sp->netdevice_nb);
 	mlxsw_sp_router_fini(mlxsw_sp);
-	mlxsw_sp_span_fini(mlxsw_sp);
 	mlxsw_sp_afa_fini(mlxsw_sp);
 	mlxsw_sp_counter_pool_fini(mlxsw_sp);
 	mlxsw_sp_switchdev_fini(mlxsw_sp);
+	mlxsw_sp_span_fini(mlxsw_sp);
 	mlxsw_sp_lag_fini(mlxsw_sp);
 	mlxsw_sp_buffers_fini(mlxsw_sp);
 	mlxsw_sp_traps_fini(mlxsw_sp);
-- 
2.14.3