[PATCH net-next 3/6] devlink: Simplify devlink resources unregister call

[Leon Romanovsky]

From: Leon Romanovsky <leonro@xxxxxxxxxx>

The devlink_resources_unregister() used second parameter as an
entry point for the recursive removal of devlink resources. None
of external to devlink users needed to use this field, so lat's
remove it.

Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxx>
---
 drivers/net/ethernet/mellanox/mlxsw/core.c    |  8 ++---
 .../net/ethernet/mellanox/mlxsw/spectrum.c    |  4 +--
 drivers/net/netdevsim/dev.c                   |  4 +--
 include/net/devlink.h                         |  3 +-
 net/core/devlink.c                            | 34 +++++++++++--------
 net/dsa/dsa.c                                 |  2 +-
 6 files changed, 29 insertions(+), 26 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.c b/drivers/net/ethernet/mellanox/mlxsw/core.c
index 3fd3812b8f31..0d1f08bbf631 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core.c
@@ -160,7 +160,7 @@ static void mlxsw_ports_fini(struct mlxsw_core *mlxsw_core, bool reload)
 
 	devlink_resource_occ_get_unregister(devlink, MLXSW_CORE_RESOURCE_PORTS);
 	if (!reload)
-		devlink_resources_unregister(priv_to_devlink(mlxsw_core), NULL);
+		devlink_resources_unregister(priv_to_devlink(mlxsw_core));
 
 	kfree(mlxsw_core->ports);
 }
@@ -2033,7 +2033,7 @@ __mlxsw_core_bus_device_register(const struct mlxsw_bus_info *mlxsw_bus_info,
 	mlxsw_ports_fini(mlxsw_core, reload);
 err_ports_init:
 	if (!reload)
-		devlink_resources_unregister(devlink, NULL);
+		devlink_resources_unregister(devlink);
 err_register_resources:
 	mlxsw_bus->fini(bus_priv);
 err_bus_init:
@@ -2099,7 +2099,7 @@ void mlxsw_core_bus_device_unregister(struct mlxsw_core *mlxsw_core,
 	kfree(mlxsw_core->lag.mapping);
 	mlxsw_ports_fini(mlxsw_core, reload);
 	if (!reload)
-		devlink_resources_unregister(devlink, NULL);
+		devlink_resources_unregister(devlink);
 	mlxsw_core->bus->fini(mlxsw_core->bus_priv);
 	if (!reload)
 		devlink_free(devlink);
@@ -2108,7 +2108,7 @@ void mlxsw_core_bus_device_unregister(struct mlxsw_core *mlxsw_core,
 
 reload_fail_deinit:
 	mlxsw_core_params_unregister(mlxsw_core);
-	devlink_resources_unregister(devlink, NULL);
+	devlink_resources_unregister(devlink);
 	devlink_free(devlink);
 }
 EXPORT_SYMBOL(mlxsw_core_bus_device_unregister);
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
index 5925db386b1b..6a5887aacbc0 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
@@ -3336,7 +3336,7 @@ static int mlxsw_sp1_resources_register(struct mlxsw_core *mlxsw_core)
 err_policer_resources_register:
 err_resources_counter_register:
 err_resources_span_register:
-	devlink_resources_unregister(priv_to_devlink(mlxsw_core), NULL);
+	devlink_resources_unregister(priv_to_devlink(mlxsw_core));
 	return err;
 }
 
@@ -3370,7 +3370,7 @@ static int mlxsw_sp2_resources_register(struct mlxsw_core *mlxsw_core)
 err_policer_resources_register:
 err_resources_counter_register:
 err_resources_span_register:
-	devlink_resources_unregister(priv_to_devlink(mlxsw_core), NULL);
+	devlink_resources_unregister(priv_to_devlink(mlxsw_core));
 	return err;
 }
 
diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c
index 54345c096a16..08d7b465a0de 100644
--- a/drivers/net/netdevsim/dev.c
+++ b/drivers/net/netdevsim/dev.c
@@ -1622,7 +1622,7 @@ int nsim_drv_probe(struct nsim_bus_dev *nsim_bus_dev)
 	devlink_params_unregister(devlink, nsim_devlink_params,
 				  ARRAY_SIZE(nsim_devlink_params));
 err_dl_unregister:
-	devlink_resources_unregister(devlink, NULL);
+	devlink_resources_unregister(devlink);
 err_vfc_free:
 	kfree(nsim_dev->vfconfigs);
 err_devlink_free:
@@ -1668,7 +1668,7 @@ void nsim_drv_remove(struct nsim_bus_dev *nsim_bus_dev)
 	nsim_dev_debugfs_exit(nsim_dev);
 	devlink_params_unregister(devlink, nsim_devlink_params,
 				  ARRAY_SIZE(nsim_devlink_params));
-	devlink_resources_unregister(devlink, NULL);
+	devlink_resources_unregister(devlink);
 	kfree(nsim_dev->vfconfigs);
 	devlink_free(devlink);
 	dev_set_drvdata(&nsim_bus_dev->dev, NULL);
diff --git a/include/net/devlink.h b/include/net/devlink.h
index aab3d007c577..f919545f5781 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -1567,8 +1567,7 @@ int devlink_resource_register(struct devlink *devlink,
 			      u64 resource_id,
 			      u64 parent_resource_id,
 			      const struct devlink_resource_size_params *size_params);
-void devlink_resources_unregister(struct devlink *devlink,
-				  struct devlink_resource *resource);
+void devlink_resources_unregister(struct devlink *devlink);
 int devlink_resource_size_get(struct devlink *devlink,
 			      u64 resource_id,
 			      u64 *p_resource_size);
diff --git a/net/core/devlink.c b/net/core/devlink.c
index dcc09c62f3e5..af94015b7424 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -9889,34 +9889,38 @@ int devlink_resource_register(struct devlink *devlink,
 }
 EXPORT_SYMBOL_GPL(devlink_resource_register);
 
+static void devlink_resource_unregister(struct devlink *devlink,
+					struct devlink_resource *resource)
+{
+	struct devlink_resource *tmp, *child_resource;
+
+	list_for_each_entry_safe(child_resource, tmp, &resource->resource_list,
+				 list) {
+		devlink_resource_unregister(devlink, child_resource);
+		list_del(&child_resource->list);
+		kfree(child_resource);
+	}
+}
+
 /**
  *	devlink_resources_unregister - free all resources
  *
  *	@devlink: devlink
- *	@resource: resource
  */
-void devlink_resources_unregister(struct devlink *devlink,
-				  struct devlink_resource *resource)
+void devlink_resources_unregister(struct devlink *devlink)
 {
 	struct devlink_resource *tmp, *child_resource;
-	struct list_head *resource_list;
-
-	if (resource)
-		resource_list = &resource->resource_list;
-	else
-		resource_list = &devlink->resource_list;
 
-	if (!resource)
-		mutex_lock(&devlink->lock);
+	mutex_lock(&devlink->lock);
 
-	list_for_each_entry_safe(child_resource, tmp, resource_list, list) {
-		devlink_resources_unregister(devlink, child_resource);
+	list_for_each_entry_safe(child_resource, tmp, &devlink->resource_list,
+				 list) {
+		devlink_resource_unregister(devlink, child_resource);
 		list_del(&child_resource->list);
 		kfree(child_resource);
 	}
 
-	if (!resource)
-		mutex_unlock(&devlink->lock);
+	mutex_unlock(&devlink->lock);
 }
 EXPORT_SYMBOL_GPL(devlink_resources_unregister);
 
diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
index ea5169e671ae..d9d0d227092c 100644
--- a/net/dsa/dsa.c
+++ b/net/dsa/dsa.c
@@ -406,7 +406,7 @@ EXPORT_SYMBOL_GPL(dsa_devlink_resource_register);
 
 void dsa_devlink_resources_unregister(struct dsa_switch *ds)
 {
-	devlink_resources_unregister(ds->devlink, NULL);
+	devlink_resources_unregister(ds->devlink);
 }
 EXPORT_SYMBOL_GPL(dsa_devlink_resources_unregister);
 
-- 
2.33.1