netdev - [patch net-next v3 1/3] mlx4: Split restart

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Date:   Thu, 12 Sep 2019 10:49:44 +0200
From:   Jiri Pirko <jiri@...nulli.us>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, idosch@...lanox.com, dsahern@...il.com,
        jakub.kicinski@...ronome.com, tariqt@...lanox.com,
        mlxsw@...lanox.com
Subject: [patch net-next v3 1/3] mlx4: Split restart_one into two functions

From: Jiri Pirko <jiri@...lanox.com>

Split the function restart_one into two functions and separate teardown
and buildup.

Signed-off-by: Jiri Pirko <jiri@...lanox.com>
---
 drivers/net/ethernet/mellanox/mlx4/catas.c |  2 +-
 drivers/net/ethernet/mellanox/mlx4/main.c  | 25 ++++++++++++++++++----
 drivers/net/ethernet/mellanox/mlx4/mlx4.h  |  3 +--
 3 files changed, 23 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx4/catas.c b/drivers/net/ethernet/mellanox/mlx4/catas.c
index 87e90b5d4d7d..5b11557f1ae4 100644
--- a/drivers/net/ethernet/mellanox/mlx4/catas.c
+++ b/drivers/net/ethernet/mellanox/mlx4/catas.c
@@ -210,7 +210,7 @@ static void mlx4_handle_error_state(struct mlx4_dev_persistent *persist)
 	mutex_lock(&persist->interface_state_mutex);
 	if (persist->interface_state & MLX4_INTERFACE_STATE_UP &&
 	    !(persist->interface_state & MLX4_INTERFACE_STATE_DELETION)) {
-		err = mlx4_restart_one(persist->pdev, false, NULL);
+		err = mlx4_restart_one(persist->pdev);
 		mlx4_info(persist->dev, "mlx4_restart_one was ended, ret=%d\n",
 			  err);
 	}
diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c
index 07c204bd3fc4..a39c647c12dc 100644
--- a/drivers/net/ethernet/mellanox/mlx4/main.c
+++ b/drivers/net/ethernet/mellanox/mlx4/main.c
@@ -3931,6 +3931,10 @@ static void mlx4_devlink_param_load_driverinit_values(struct devlink *devlink)
 	}
 }
 
+static void mlx4_restart_one_down(struct pci_dev *pdev);
+static int mlx4_restart_one_up(struct pci_dev *pdev, bool reload,
+			       struct devlink *devlink);
+
 static int mlx4_devlink_reload(struct devlink *devlink,
 			       struct netlink_ext_ack *extack)
 {
@@ -3941,9 +3945,11 @@ static int mlx4_devlink_reload(struct devlink *devlink,
 
 	if (persist->num_vfs)
 		mlx4_warn(persist->dev, "Reload performed on PF, will cause reset on operating Virtual Functions\n");
-	err = mlx4_restart_one(persist->pdev, true, devlink);
+	mlx4_restart_one_down(persist->pdev);
+	err = mlx4_restart_one_up(persist->pdev, true, devlink);
 	if (err)
-		mlx4_err(persist->dev, "mlx4_restart_one failed, ret=%d\n", err);
+		mlx4_err(persist->dev, "mlx4_restart_one_up failed, ret=%d\n",
+			 err);
 
 	return err;
 }
@@ -4163,7 +4169,13 @@ static int restore_current_port_types(struct mlx4_dev *dev,
 	return err;
 }
 
-int mlx4_restart_one(struct pci_dev *pdev, bool reload, struct devlink *devlink)
+static void mlx4_restart_one_down(struct pci_dev *pdev)
+{
+	mlx4_unload_one(pdev);
+}
+
+static int mlx4_restart_one_up(struct pci_dev *pdev, bool reload,
+			       struct devlink *devlink)
 {
 	struct mlx4_dev_persistent *persist = pci_get_drvdata(pdev);
 	struct mlx4_dev	 *dev  = persist->dev;
@@ -4175,7 +4187,6 @@ int mlx4_restart_one(struct pci_dev *pdev, bool reload, struct devlink *devlink)
 	total_vfs = dev->persist->num_vfs;
 	memcpy(nvfs, dev->persist->nvfs, sizeof(dev->persist->nvfs));
 
-	mlx4_unload_one(pdev);
 	if (reload)
 		mlx4_devlink_param_load_driverinit_values(devlink);
 	err = mlx4_load_one(pdev, pci_dev_data, total_vfs, nvfs, priv, 1);
@@ -4194,6 +4205,12 @@ int mlx4_restart_one(struct pci_dev *pdev, bool reload, struct devlink *devlink)
 	return err;
 }
 
+int mlx4_restart_one(struct pci_dev *pdev)
+{
+	mlx4_restart_one_down(pdev);
+	return mlx4_restart_one_up(pdev, false, NULL);
+}
+
 #define MLX_SP(id) { PCI_VDEVICE(MELLANOX, id), MLX4_PCI_DEV_FORCE_SENSE_PORT }
 #define MLX_VF(id) { PCI_VDEVICE(MELLANOX, id), MLX4_PCI_DEV_IS_VF }
 #define MLX_GN(id) { PCI_VDEVICE(MELLANOX, id), 0 }
diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4.h b/drivers/net/ethernet/mellanox/mlx4/mlx4.h
index 23f1b5b512c2..527b52e48276 100644
--- a/drivers/net/ethernet/mellanox/mlx4/mlx4.h
+++ b/drivers/net/ethernet/mellanox/mlx4/mlx4.h
@@ -1043,8 +1043,7 @@ int mlx4_catas_init(struct mlx4_dev *dev);
 void mlx4_catas_end(struct mlx4_dev *dev);
 int mlx4_crdump_init(struct mlx4_dev *dev);
 void mlx4_crdump_end(struct mlx4_dev *dev);
-int mlx4_restart_one(struct pci_dev *pdev, bool reload,
-		     struct devlink *devlink);
+int mlx4_restart_one(struct pci_dev *pdev);
 int mlx4_register_device(struct mlx4_dev *dev);
 void mlx4_unregister_device(struct mlx4_dev *dev);
 void mlx4_dispatch_event(struct mlx4_dev *dev, enum mlx4_dev_event type,
-- 
2.21.0