[Linux-kernel-mentees] [PATCH v2 08/11] mlx4: use generic power management

[Vaibhav Gupta]

With legacy PM, drivers themselves were responsible for managing the
device's power states and takes care of register states.

After upgrading to the generic structure, PCI core will take care of
required tasks and drivers should do only device-specific operations.

Use "struct dev_pm_ops" variable to bind the callbacks.

Compile-tested only.

Signed-off-by: Vaibhav Gupta <vaibhavgupta40 at gmail.com>
---
 drivers/net/ethernet/mellanox/mlx4/main.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c
index 3d9aa7da95e9..4cae7db8d49c 100644
--- a/drivers/net/ethernet/mellanox/mlx4/main.c
+++ b/drivers/net/ethernet/mellanox/mlx4/main.c
@@ -4370,8 +4370,9 @@ static const struct pci_error_handlers mlx4_err_handler = {
 	.resume		= mlx4_pci_resume,
 };
 
-static int mlx4_suspend(struct pci_dev *pdev, pm_message_t state)
+static int mlx4_suspend(struct device *dev_d)
 {
+	struct pci_dev *pdev = to_pci_dev(dev_d);
 	struct mlx4_dev_persistent *persist = pci_get_drvdata(pdev);
 	struct mlx4_dev	*dev = persist->dev;
 
@@ -4384,8 +4385,9 @@ static int mlx4_suspend(struct pci_dev *pdev, pm_message_t state)
 	return 0;
 }
 
-static int mlx4_resume(struct pci_dev *pdev)
+static int mlx4_resume(struct device *dev_d)
 {
+	struct pci_dev *pdev = to_pci_dev(dev_d);
 	struct mlx4_dev_persistent *persist = pci_get_drvdata(pdev);
 	struct mlx4_dev	*dev = persist->dev;
 	struct mlx4_priv *priv = mlx4_priv(dev);
@@ -4414,14 +4416,15 @@ static int mlx4_resume(struct pci_dev *pdev)
 	return ret;
 }
 
+static SIMPLE_DEV_PM_OPS(mlx4_pm_ops, mlx4_suspend, mlx4_resume);
+
 static struct pci_driver mlx4_driver = {
 	.name		= DRV_NAME,
 	.id_table	= mlx4_pci_table,
 	.probe		= mlx4_init_one,
 	.shutdown	= mlx4_shutdown,
 	.remove		= mlx4_remove_one,
-	.suspend	= mlx4_suspend,
-	.resume		= mlx4_resume,
+	.driver.pm	= &mlx4_pm_ops,
 	.err_handler    = &mlx4_err_handler,
 };
 
-- 
2.27.0