From: Vaibhav Gupta <vaibhavgupta40@gmail.com>
Date: Mon, 29 Jun 2020 23:04:56 +0530
Subject: staging: qlge/qlge_main.c: use generic power management
Patch-mainline: v5.9-rc1
Git-commit: be1247782e5ce606ad47220a87bd3d0fbabe3e4c
References: jsc#SLE-15139

Drivers should not use legacy power management as they have to manage power
states and related operations, for the device, themselves. This driver was
handling them with the help of PCI helper functions like
pci_save/restore_state(), pci_enable/disable_device(), etc.

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

The driver was also using pci_enable_wake(...,..., 0) to disable wake. Use
device_wakeup_disable() instead.

Compile-tested only.

Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com>
Link: https://lore.kernel.org/r/20200629173459.262075-2-vaibhavgupta40@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Shung-Hsi Yu <shung-hsi.yu@suse.com>
---
 drivers/staging/qlge/qlge_main.c |   38 ++++++++++----------------------------
 1 file changed, 10 insertions(+), 28 deletions(-)

--- a/drivers/staging/qlge/qlge_main.c
+++ b/drivers/staging/qlge/qlge_main.c
@@ -4764,9 +4764,9 @@ static const struct pci_error_handlers q
 	.resume = qlge_io_resume,
 };
 
-static int qlge_suspend(struct pci_dev *pdev, pm_message_t state)
+static int __maybe_unused qlge_suspend(struct device *dev_d)
 {
-	struct net_device *ndev = pci_get_drvdata(pdev);
+	struct net_device *ndev = dev_get_drvdata(dev_d);
 	struct ql_adapter *qdev = netdev_priv(ndev);
 	int err;
 
@@ -4780,35 +4780,19 @@ static int qlge_suspend(struct pci_dev *
 	}
 
 	ql_wol(qdev);
-	err = pci_save_state(pdev);
-	if (err)
-		return err;
-
-	pci_disable_device(pdev);
-
-	pci_set_power_state(pdev, pci_choose_state(pdev, state));
 
 	return 0;
 }
 
-#ifdef CONFIG_PM
-static int qlge_resume(struct pci_dev *pdev)
+static int __maybe_unused qlge_resume(struct device *dev_d)
 {
-	struct net_device *ndev = pci_get_drvdata(pdev);
+	struct net_device *ndev = dev_get_drvdata(dev_d);
 	struct ql_adapter *qdev = netdev_priv(ndev);
 	int err;
 
-	pci_set_power_state(pdev, PCI_D0);
-	pci_restore_state(pdev);
-	err = pci_enable_device(pdev);
-	if (err) {
-		netif_err(qdev, ifup, qdev->ndev, "Cannot enable PCI device from suspend\n");
-		return err;
-	}
-	pci_set_master(pdev);
+	pci_set_master(to_pci_dev(dev_d));
 
-	pci_enable_wake(pdev, PCI_D3hot, 0);
-	pci_enable_wake(pdev, PCI_D3cold, 0);
+	device_wakeup_disable(dev_d);
 
 	if (netif_running(ndev)) {
 		err = ql_adapter_up(qdev);
@@ -4821,22 +4805,20 @@ static int qlge_resume(struct pci_dev *p
 
 	return 0;
 }
-#endif /* CONFIG_PM */
 
 static void qlge_shutdown(struct pci_dev *pdev)
 {
-	qlge_suspend(pdev, PMSG_SUSPEND);
+	qlge_suspend(&pdev->dev);
 }
 
+static SIMPLE_DEV_PM_OPS(qlge_pm_ops, qlge_suspend, qlge_resume);
+
 static struct pci_driver qlge_driver = {
 	.name = DRV_NAME,
 	.id_table = qlge_pci_tbl,
 	.probe = qlge_probe,
 	.remove = qlge_remove,
-#ifdef CONFIG_PM
-	.suspend = qlge_suspend,
-	.resume = qlge_resume,
-#endif
+	.driver.pm = &qlge_pm_ops,
 	.shutdown = qlge_shutdown,
 	.err_handler = &qlge_err_handler
 };