[SCSI] megaraid_sas: Fix bug where AENs could be lost in probe() and resume()

Signed-off-by: NAdam Radford <aradford@gmail.com>
Signed-off-by: NJames Bottomley <jbottomley@parallels.com>

drivers/scsi/megaraid/megaraid_sas_base.c

@@ -4114,6 +4114,14 @@ megasas_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
 	megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = instance;
 	megasas_mgmt_info.max_index++;
 
+	/*
+	 * Register with SCSI mid-layer
+	 */
+	if (megasas_io_attach(instance))
+		goto fail_io_attach;
+
+	instance->unload = 0;
+
 	/*
 	 * Initiate AEN (Asynchronous Event Notification)
 	 */
@@ -4122,13 +4130,6 @@ megasas_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
 		goto fail_start_aen;
 	}
 
-	/*
-	 * Register with SCSI mid-layer
-	 */
-	if (megasas_io_attach(instance))
-		goto fail_io_attach;
-
-	instance->unload = 0;
 	return 0;
 
       fail_start_aen:
@@ -4383,12 +4384,6 @@ megasas_resume(struct pci_dev *pdev)
 
 	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,
@@ -4396,6 +4391,12 @@ megasas_resume(struct pci_dev *pdev)
 				MEGASAS_COMPLETION_TIMER_INTERVAL);
 	instance->unload = 0;
 
+	/*
+	 * Initiate AEN (Asynchronous Event Notification)
+	 */
+	if (megasas_start_aen(instance))
+		printk(KERN_ERR "megasas: Start AEN failed\n");
+
 	return 0;
 
 fail_irq: