scsi: aacraid: Use hotplug handling function in place of scsi_scan_host

Driver uses scsi_scan_host to add new devices in the driver init path,
which adds all the fw exposed devices. The drivers resorts to queue
command checks to block out commands to _hidden_ devices.

Use the hotplug handler code to add new devices during driver init and
other areas, this is only for safw. For ARC scsi_scan_host will still
apply.
Signed-off-by: Raghava Aditya Renukunta <RaghavaAditya.Renukunta@microsemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/aacraid/aachba.c

@@ -2150,10 +2150,6 @@ int aac_get_adapter_info(struct aac_dev* dev)
 		dev->maximum_num_channels = le32_to_cpu(bus_info->BusCount);
 	}
 
-	if (!dev->sync_mode && dev->sa_firmware &&
-		dev->supplement_adapter_info.virt_device_bus != 0xffff)
-		rcode = aac_setup_safw_adapter(dev, AAC_INIT);
-
 	if (!dev->in_reset) {
 		char buffer[16];
 		tmp = le32_to_cpu(dev->adapter_info.kernelrev);

drivers/scsi/aacraid/aacraid.h

@@ -2719,6 +2719,7 @@ static inline int aac_supports_2T(struct aac_dev *dev)
 	return (dev->adapter_info.options & AAC_OPT_NEW_COMM_64);
 }
 
+int aac_scan_host(struct aac_dev *dev, int rescan);
 char * get_container_type(unsigned type);
 extern int numacb;
 extern char aac_driver_version[];

drivers/scsi/aacraid/commsup.c

@@ -1964,6 +1964,19 @@ static int aac_update_safw_host_devices(struct aac_dev *dev, int rescan)
 	return rcode;
 }
 
+int aac_scan_host(struct aac_dev *dev, int rescan)
+{
+	int rcode = 0;
+
+	mutex_lock(&dev->scan_mutex);
+	if (dev->sa_firmware)
+		rcode = aac_update_safw_host_devices(dev, rescan);
+	else
+		scsi_scan_host(dev->scsi_host_ptr);
+	mutex_unlock(&dev->scan_mutex);
+	return rcode;
+}
+
 /**
  *	aac_handle_sa_aif	Handle a message from the firmware
  *	@dev: Which adapter this fib is from
@@ -1997,9 +2010,8 @@ static void aac_handle_sa_aif(struct aac_dev *dev, struct fib *fibptr)
 	case SA_AIF_LDEV_CHANGE:
 	case SA_AIF_BPCFG_CHANGE:
 
-		mutex_lock(&dev->scan_mutex);
-		aac_update_safw_host_devices(dev, AAC_RESCAN);
-		mutex_unlock(&dev->scan_mutex);
+		aac_scan_host(dev, AAC_RESCAN);
+
 		break;
 
 	case SA_AIF_BPSTAT_CHANGE:

drivers/scsi/aacraid/linit.c

@@ -1787,7 +1787,8 @@ static int aac_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
 	error = scsi_add_host(shost, &pdev->dev);
 	if (error)
 		goto out_deinit;
-	scsi_scan_host(shost);
+
+	aac_scan_host(aac, AAC_INIT);
 
 	pci_enable_pcie_error_reporting(pdev);
 	pci_save_state(pdev);
@@ -2071,7 +2072,7 @@ static void aac_pci_resume(struct pci_dev *pdev)
 		if (sdev->sdev_state == SDEV_OFFLINE)
 			sdev->sdev_state = SDEV_RUNNING;
 	scsi_unblock_requests(aac->scsi_host_ptr);
-	scsi_scan_host(aac->scsi_host_ptr);
+	aac_scan_host(aac, AAC_RESCAN);
 	pci_save_state(pdev);
 
 	dev_err(&pdev->dev, "aacraid: PCI error - resume\n");