scsi: mpi3mr: Support new power management framework

Switch to the new generic PCI power management framework. Also, remove
unnecessary calls to the PCI helper functions (such as
pci_set_power_state(), pci_enable_wake(), pci_save_state(),
pci_restore_state() etc).

Link: https://lore.kernel.org/r/20220912135742.11764-3-sreekanth.reddy@broadcom.comSigned-off-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/mpi3mr/mpi3mr_os.c

@@ -5094,22 +5094,21 @@ static void mpi3mr_shutdown(struct pci_dev *pdev)
 	mpi3mr_cleanup_resources(mrioc);
 }
 
-#ifdef CONFIG_PM
 /**
  * mpi3mr_suspend - PCI power management suspend callback
- * @pdev: PCI device instance
- * @state: New power state
+ * @dev: Device struct
  *
  * Change the power state to the given value and cleanup the IOC
  * by issuing MUR and shutdown notification
  *
  * Return: 0 always.
  */
-static int mpi3mr_suspend(struct pci_dev *pdev, pm_message_t state)
+static int __maybe_unused
+mpi3mr_suspend(struct device *dev)
 {
+	struct pci_dev *pdev = to_pci_dev(dev);
 	struct Scsi_Host *shost = pci_get_drvdata(pdev);
 	struct mpi3mr_ioc *mrioc;
-	pci_power_t device_state;
 
 	if (!shost)
 		return 0;
@@ -5123,27 +5122,26 @@ static int mpi3mr_suspend(struct pci_dev *pdev, pm_message_t state)
 	mpi3mr_stop_watchdog(mrioc);
 	mpi3mr_cleanup_ioc(mrioc);
 
-	device_state = pci_choose_state(pdev, state);
-	ioc_info(mrioc, "pdev=0x%p, slot=%s, entering operating state [D%d]\n",
-	    pdev, pci_name(pdev), device_state);
-	pci_save_state(pdev);
+	ioc_info(mrioc, "pdev=0x%p, slot=%s, entering operating state\n",
+	    pdev, pci_name(pdev));
 	mpi3mr_cleanup_resources(mrioc);
-	pci_set_power_state(pdev, device_state);
 
 	return 0;
 }
 
 /**
  * mpi3mr_resume - PCI power management resume callback
- * @pdev: PCI device instance
+ * @dev: Device struct
  *
  * Restore the power state to D0 and reinitialize the controller
  * and resume I/O operations to the target devices
  *
  * Return: 0 on success, non-zero on failure
  */
-static int mpi3mr_resume(struct pci_dev *pdev)
+static int __maybe_unused
+mpi3mr_resume(struct device *dev)
 {
+	struct pci_dev *pdev = to_pci_dev(dev);
 	struct Scsi_Host *shost = pci_get_drvdata(pdev);
 	struct mpi3mr_ioc *mrioc;
 	pci_power_t device_state = pdev->current_state;
@@ -5156,9 +5154,6 @@ static int mpi3mr_resume(struct pci_dev *pdev)
 
 	ioc_info(mrioc, "pdev=0x%p, slot=%s, previous operating state [D%d]\n",
 	    pdev, pci_name(pdev), device_state);
-	pci_set_power_state(pdev, PCI_D0);
-	pci_enable_wake(pdev, PCI_D0, 0);
-	pci_restore_state(pdev);
 	mrioc->pdev = pdev;
 	mrioc->cpu_count = num_online_cpus();
 	r = mpi3mr_setup_resources(mrioc);
@@ -5180,7 +5175,6 @@ static int mpi3mr_resume(struct pci_dev *pdev)
 
 	return 0;
 }
-#endif
 
 static const struct pci_device_id mpi3mr_pci_id_table[] = {
 	{
@@ -5191,16 +5185,15 @@ static const struct pci_device_id mpi3mr_pci_id_table[] = {
 };
 MODULE_DEVICE_TABLE(pci, mpi3mr_pci_id_table);
 
+static SIMPLE_DEV_PM_OPS(mpi3mr_pm_ops, mpi3mr_suspend, mpi3mr_resume);
+
 static struct pci_driver mpi3mr_pci_driver = {
 	.name = MPI3MR_DRIVER_NAME,
 	.id_table = mpi3mr_pci_id_table,
 	.probe = mpi3mr_probe,
 	.remove = mpi3mr_remove,
 	.shutdown = mpi3mr_shutdown,
-#ifdef CONFIG_PM
-	.suspend = mpi3mr_suspend,
-	.resume = mpi3mr_resume,
-#endif
+	.driver.pm = &mpi3mr_pm_ops,
 };
 
 static ssize_t event_counter_show(struct device_driver *dd, char *buf)