+#ifdef CONFIG_PM
+/**
+ * megasas_suspend - driver suspend entry point
+ * @pdev: PCI device structure
+ * @state: PCI power state to suspend routine
+ */
+static int
+megasas_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+ struct Scsi_Host *host;
+ struct megasas_instance *instance;
+
+ instance = pci_get_drvdata(pdev);
+ host = instance->host;
+
+ if (poll_mode_io)
+ del_timer_sync(&instance->io_completion_timer);
+
+ megasas_flush_cache(instance);
+ megasas_shutdown_controller(instance, MR_DCMD_HIBERNATE_SHUTDOWN);
+ tasklet_kill(&instance->isr_tasklet);
+
+ pci_set_drvdata(instance->pdev, instance);
+ instance->instancet->disable_intr(instance->reg_set);
+ free_irq(instance->pdev->irq, instance);
+
+ pci_save_state(pdev);
+ pci_disable_device(pdev);
+
+ pci_set_power_state(pdev, pci_choose_state(pdev, state));
+
+ return 0;
+}
+
+/**
+ * megasas_resume- driver resume entry point
+ * @pdev: PCI device structure
+ */
+static int
+megasas_resume(struct pci_dev *pdev)
+{
+ int rval;
+ struct Scsi_Host *host;
+ struct megasas_instance *instance;
+
+ instance = pci_get_drvdata(pdev);
+ host = instance->host;
+ pci_set_power_state(pdev, PCI_D0);
+ pci_enable_wake(pdev, PCI_D0, 0);
+ pci_restore_state(pdev);
+
+ /*
+ * PCI prepping: enable device set bus mastering and dma mask
+ */
+ rval = pci_enable_device(pdev);
+
+ if (rval) {
+ printk(KERN_ERR "megasas: Enable device failed\n");
+ return rval;
+ }
+
+ pci_set_master(pdev);
+
+ if (megasas_set_dma_mask(pdev))
+ goto fail_set_dma_mask;
+
+ /*
+ * Initialize MFI Firmware
+ */
+
+ *instance->producer = 0;
+ *instance->consumer = 0;
+
+ atomic_set(&instance->fw_outstanding, 0);
+
+ /*
+ * We expect the FW state to be READY
+ */
+ if (megasas_transition_to_ready(instance))
+ goto fail_ready_state;
+
+ if (megasas_issue_init_mfi(instance))
+ goto fail_init_mfi;
+
+ tasklet_init(&instance->isr_tasklet, megasas_complete_cmd_dpc,
+ (unsigned long)instance);
+
+ /*
+ * Register IRQ
+ */
+ if (request_irq(pdev->irq, megasas_isr, IRQF_SHARED,
+ "megasas", instance)) {
+ printk(KERN_ERR "megasas: Failed to register IRQ\n");
+ goto fail_irq;
+ }
+
+ instance->instancet->enable_intr(instance->reg_set);
+
+ /*
+ * Initiate AEN (Asynchronous Event Notification)
+ */
+ if (megasas_start_aen(instance))
+ printk(KERN_ERR "megasas: Start AEN failed\n");
+
+ /* Initialize the cmd completion timer */
+ if (poll_mode_io)
+ megasas_start_timer(instance, &instance->io_completion_timer,
+ megasas_io_completion_timer,
+ MEGASAS_COMPLETION_TIMER_INTERVAL);
+ return 0;
+
+fail_irq:
+fail_init_mfi:
+ if (instance->evt_detail)
+ pci_free_consistent(pdev, sizeof(struct megasas_evt_detail),
+ instance->evt_detail,
+ instance->evt_detail_h);
+
+ if (instance->producer)
+ pci_free_consistent(pdev, sizeof(u32), instance->producer,
+ instance->producer_h);
+ if (instance->consumer)
+ pci_free_consistent(pdev, sizeof(u32), instance->consumer,
+ instance->consumer_h);
+ scsi_host_put(host);
+
+fail_set_dma_mask:
+fail_ready_state:
+
+ pci_disable_device(pdev);
+
+ return -ENODEV;
+}
+#else
+#define megasas_suspend NULL
+#define megasas_resume NULL
+#endif
+