[PATCH net-next 3/8] mlxsw: core: Re-order initialization sequence

[Ido Schimmel]

From: Ido Schimmel <ido...@mellanox.com>

The driver core first registers with the hwmon and thermal subsystems
and only then proceeds to initialize the switch driver (e.g.,
mlxsw_spectrum). It is only during the last stage that the current
firmware version is validated and a newer one flashed, if necessary.

The above means that if a new firmware feature is utilized by the
hwmon/thermal code, the driver will not be able to load.

Solve this by re-ordering initializing the switch driver before
registering with the hwmon and thermal subsystems.

Signed-off-by: Ido Schimmel <ido...@mellanox.com>
Reported-by: Shalom Toledo <shal...@mellanox.com>
Acked-by: Jiri Pirko <j...@mellanox.com>
---
 drivers/net/ethernet/mellanox/mlxsw/core.c | 21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.c 
b/drivers/net/ethernet/mellanox/mlxsw/core.c
index 6ee6de7f0160..182762898361 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core.c
@@ -1098,6 +1098,12 @@ __mlxsw_core_bus_device_register(const struct 
mlxsw_bus_info *mlxsw_bus_info,
                        goto err_register_params;
        }
 
+       if (mlxsw_driver->init) {
+               err = mlxsw_driver->init(mlxsw_core, mlxsw_bus_info);
+               if (err)
+                       goto err_driver_init;
+       }
+
        err = mlxsw_hwmon_init(mlxsw_core, mlxsw_bus_info, &mlxsw_core->hwmon);
        if (err)
                goto err_hwmon_init;
@@ -1107,22 +1113,17 @@ __mlxsw_core_bus_device_register(const struct 
mlxsw_bus_info *mlxsw_bus_info,
        if (err)
                goto err_thermal_init;
 
-       if (mlxsw_driver->init) {
-               err = mlxsw_driver->init(mlxsw_core, mlxsw_bus_info);
-               if (err)
-                       goto err_driver_init;
-       }
-
        if (mlxsw_driver->params_register && !reload)
                devlink_params_publish(devlink);
 
        return 0;
 
-err_driver_init:
-       mlxsw_thermal_fini(mlxsw_core->thermal);
 err_thermal_init:
        mlxsw_hwmon_fini(mlxsw_core->hwmon);
 err_hwmon_init:
+       if (mlxsw_core->driver->fini)
+               mlxsw_core->driver->fini(mlxsw_core);
+err_driver_init:
        if (mlxsw_driver->params_unregister && !reload)
                mlxsw_driver->params_unregister(mlxsw_core);
 err_register_params:
@@ -1187,10 +1188,10 @@ void mlxsw_core_bus_device_unregister(struct mlxsw_core 
*mlxsw_core,
 
        if (mlxsw_core->driver->params_unregister && !reload)
                devlink_params_unpublish(devlink);
-       if (mlxsw_core->driver->fini)
-               mlxsw_core->driver->fini(mlxsw_core);
        mlxsw_thermal_fini(mlxsw_core->thermal);
        mlxsw_hwmon_fini(mlxsw_core->hwmon);
+       if (mlxsw_core->driver->fini)
+               mlxsw_core->driver->fini(mlxsw_core);
        if (mlxsw_core->driver->params_unregister && !reload)
                mlxsw_core->driver->params_unregister(mlxsw_core);
        if (!reload)
-- 
2.20.1