net/mlx5: E-switch, register event handler before arming the event

[ Upstream commit 7624e58a8b3a251e3e5108b32f2183b34453db32 ]

Currently, mlx5 is registering event handler for vport context change
event some time after arming the event. this can lead to missing an
event, which will result in wrong rules in the FDB.
Hence, register the event handler before arming the event.

This solution is valid since FW is sending vport context change event
only on vports which SW armed, and SW arming the vport when enabling
it, which is done after the FDB has been created.

Fixes: 6933a9379559 ("net/mlx5: E-Switch, Use async events chain")
Signed-off-by: Shay Drory <shayd@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
index 4b9d567c8f473b78e2234703213707b18840b11e..48939c72b5925167347b41c0a95610558fca728a 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
@@ -969,11 +969,8 @@ const u32 *mlx5_esw_query_functions(struct mlx5_core_dev *dev)
        return ERR_PTR(err);
 }
 
-static void mlx5_eswitch_event_handlers_register(struct mlx5_eswitch *esw)
+static void mlx5_eswitch_event_handler_register(struct mlx5_eswitch *esw)
 {
-       MLX5_NB_INIT(&esw->nb, eswitch_vport_event, NIC_VPORT_CHANGE);
-       mlx5_eq_notifier_register(esw->dev, &esw->nb);
-
        if (esw->mode == MLX5_ESWITCH_OFFLOADS && mlx5_eswitch_is_funcs_handler(esw->dev)) {
                MLX5_NB_INIT(&esw->esw_funcs.nb, mlx5_esw_funcs_changed_handler,
                             ESW_FUNCTIONS_CHANGED);
@@ -981,13 +978,11 @@ static void mlx5_eswitch_event_handlers_register(struct mlx5_eswitch *esw)
        }
 }
 
-static void mlx5_eswitch_event_handlers_unregister(struct mlx5_eswitch *esw)
+static void mlx5_eswitch_event_handler_unregister(struct mlx5_eswitch *esw)
 {
        if (esw->mode == MLX5_ESWITCH_OFFLOADS && mlx5_eswitch_is_funcs_handler(esw->dev))
                mlx5_eq_notifier_unregister(esw->dev, &esw->esw_funcs.nb);
 
-       mlx5_eq_notifier_unregister(esw->dev, &esw->nb);
-
        flush_workqueue(esw->work_queue);
 }
 
@@ -1273,6 +1268,9 @@ int mlx5_eswitch_enable_locked(struct mlx5_eswitch *esw, int num_vfs)
 
        mlx5_eswitch_update_num_of_vfs(esw, num_vfs);
 
+       MLX5_NB_INIT(&esw->nb, eswitch_vport_event, NIC_VPORT_CHANGE);
+       mlx5_eq_notifier_register(esw->dev, &esw->nb);
+
        if (esw->mode == MLX5_ESWITCH_LEGACY) {
                err = esw_legacy_enable(esw);
        } else {
@@ -1285,7 +1283,7 @@ int mlx5_eswitch_enable_locked(struct mlx5_eswitch *esw, int num_vfs)
 
        esw->fdb_table.flags |= MLX5_ESW_FDB_CREATED;
 
-       mlx5_eswitch_event_handlers_register(esw);
+       mlx5_eswitch_event_handler_register(esw);
 
        esw_info(esw->dev, "Enable: mode(%s), nvfs(%d), active vports(%d)\n",
                 esw->mode == MLX5_ESWITCH_LEGACY ? "LEGACY" : "OFFLOADS",
@@ -1394,7 +1392,8 @@ void mlx5_eswitch_disable_locked(struct mlx5_eswitch *esw)
         */
        mlx5_esw_mode_change_notify(esw, MLX5_ESWITCH_LEGACY);
 
-       mlx5_eswitch_event_handlers_unregister(esw);
+       mlx5_eq_notifier_unregister(esw->dev, &esw->nb);
+       mlx5_eswitch_event_handler_unregister(esw);
 
        esw_info(esw->dev, "Disable: mode(%s), nvfs(%d), active vports(%d)\n",
                 esw->mode == MLX5_ESWITCH_LEGACY ? "LEGACY" : "OFFLOADS",