From: Vaibhav Gupta <vaibhavgupta40@gmail.com>
Date: Wed, 1 Jul 2020 22:20:53 +0530
Subject: benet: use generic power management
Patch-mainline: v5.9-rc1
Git-commit: e9a7f8c5865d877e96f19dc7e6c457e42d05c030
References: jsc#SLE-15083

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.

Thus, there is no need to call the PCI helper functions like
pci_enable/disable_device(), pci_save/restore_sate() and
pci_set_power_state().

Compile-tested only.

Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/emulex/benet/be_main.c |   22 +++++++---------------
 1 file changed, 7 insertions(+), 15 deletions(-)

--- a/drivers/net/ethernet/emulex/benet/be_main.c
+++ b/drivers/net/ethernet/emulex/benet/be_main.c
@@ -6040,32 +6040,23 @@ do_none:
 	return status;
 }
 
-static int be_suspend(struct pci_dev *pdev, pm_message_t state)
+static int __maybe_unused be_suspend(struct device *dev_d)
 {
-	struct be_adapter *adapter = pci_get_drvdata(pdev);
+	struct be_adapter *adapter = dev_get_drvdata(dev_d);
 
 	be_intr_set(adapter, false);
 	be_cancel_err_detection(adapter);
 
 	be_cleanup(adapter);
 
-	pci_save_state(pdev);
-	pci_disable_device(pdev);
-	pci_set_power_state(pdev, pci_choose_state(pdev, state));
 	return 0;
 }
 
-static int be_pci_resume(struct pci_dev *pdev)
+static int __maybe_unused be_pci_resume(struct device *dev_d)
 {
-	struct be_adapter *adapter = pci_get_drvdata(pdev);
+	struct be_adapter *adapter = dev_get_drvdata(dev_d);
 	int status = 0;
 
-	status = pci_enable_device(pdev);
-	if (status)
-		return status;
-
-	pci_restore_state(pdev);
-
 	status = be_resume(adapter);
 	if (status)
 		return status;
@@ -6237,13 +6228,14 @@ static const struct pci_error_handlers b
 	.resume = be_eeh_resume,
 };
 
+static SIMPLE_DEV_PM_OPS(be_pci_pm_ops, be_suspend, be_pci_resume);
+
 static struct pci_driver be_driver = {
 	.name = DRV_NAME,
 	.id_table = be_dev_ids,
 	.probe = be_probe,
 	.remove = be_remove,
-	.suspend = be_suspend,
-	.resume = be_pci_resume,
+	.driver.pm = &be_pci_pm_ops,
 	.shutdown = be_shutdown,
 	.sriov_configure = be_pci_sriov_configure,
 	.err_handler = &be_eeh_handlers