[Linux-kernel-mentees] [PATCH v1 1/2] epic100: use generic power management

Vaibhav Gupta vaibhavgupta40 at gmail.com
Thu Jul 2 10:53:50 UTC 2020


Drivers should not use legacy power management as they have to manage power
states and related operations, for the device, themselves.

With generic PM, all essentials will be handled by the PCI core. Driver
needs to do only device-specific operations.

Compile-tested only.

Signed-off-by: Vaibhav Gupta <vaibhavgupta40 at gmail.com>
---
 drivers/net/ethernet/smsc/epic100.c | 19 ++++++-------------
 1 file changed, 6 insertions(+), 13 deletions(-)

diff --git a/drivers/net/ethernet/smsc/epic100.c b/drivers/net/ethernet/smsc/epic100.c
index 61ddee0c2a2e..d950b312c418 100644
--- a/drivers/net/ethernet/smsc/epic100.c
+++ b/drivers/net/ethernet/smsc/epic100.c
@@ -1512,12 +1512,9 @@ static void epic_remove_one(struct pci_dev *pdev)
 	/* pci_power_off(pdev, -1); */
 }
 
-
-#ifdef CONFIG_PM
-
-static int epic_suspend (struct pci_dev *pdev, pm_message_t state)
+static int __maybe_unused epic_suspend(struct device *dev_d)
 {
-	struct net_device *dev = pci_get_drvdata(pdev);
+	struct net_device *dev = dev_get_drvdata(dev_d);
 	struct epic_private *ep = netdev_priv(dev);
 	void __iomem *ioaddr = ep->ioaddr;
 
@@ -1531,9 +1528,9 @@ static int epic_suspend (struct pci_dev *pdev, pm_message_t state)
 }
 
 
-static int epic_resume (struct pci_dev *pdev)
+static int __maybe_unused epic_resume(struct device *dev_d)
 {
-	struct net_device *dev = pci_get_drvdata(pdev);
+	struct net_device *dev = dev_get_drvdata(dev_d);
 
 	if (!netif_running(dev))
 		return 0;
@@ -1542,18 +1539,14 @@ static int epic_resume (struct pci_dev *pdev)
 	return 0;
 }
 
-#endif /* CONFIG_PM */
-
+static SIMPLE_DEV_PM_OPS(epic_pm_ops, epic_suspend, epic_resume);
 
 static struct pci_driver epic_driver = {
 	.name		= DRV_NAME,
 	.id_table	= epic_pci_tbl,
 	.probe		= epic_init_one,
 	.remove		= epic_remove_one,
-#ifdef CONFIG_PM
-	.suspend	= epic_suspend,
-	.resume		= epic_resume,
-#endif /* CONFIG_PM */
+	.driver.pm	= &epic_pm_ops,
 };
 
 
-- 
2.27.0



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