scsi: aacraid: Process hba and container hot plug events in single function

The hotplug handler code is duplicated for hba handling and container
handling.

Merged function to handle hba and container hot plug events into the
resolve luns functions. Added a bunch of helper functions to check the
validity of a given target and to check if bus, target is container
device.
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

@@ -1982,6 +1982,8 @@ static void aac_set_safw_attr_all_targets(struct aac_dev *dev, int rescan)
 
 	lun_count = aac_get_safw_phys_lun_count(dev);
 
+	dev->scan_counter++;
+
 	for (i = 0; i < lun_count; ++i) {
 
 		bus = aac_get_safw_phys_bus(dev, i);
@@ -2007,13 +2009,12 @@ static void aac_set_safw_attr_all_targets(struct aac_dev *dev, int rescan)
 		} else
 			devtype = AAC_DEVTYPE_ARC_RAW;
 
+		dev->hba_map[bus][target].scan_counter = dev->scan_counter;
+
 		aac_set_safw_target_qd(dev, bus, target);
 
 update_devtype:
-		if (rescan == AAC_INIT)
 		dev->hba_map[bus][target].devtype = devtype;
-		else
-			dev->hba_map[bus][target].new_devtype = devtype;
 	}
 }
 

drivers/scsi/aacraid/aacraid.h

@@ -1340,11 +1340,11 @@ struct fib {
 struct aac_hba_map_info {
 	__le32	rmw_nexus;		/* nexus for native HBA devices */
 	u8		devtype;	/* device type */
-	u8		new_devtype;
 	u8		reset_state;	/* 0 - no reset, 1..x - */
 					/* after xth TM LUN reset */
 	u16		qd_limit;
 	u8		expose;		/*checks if to expose or not*/
+	u32		scan_counter;
 	struct aac_ciss_identify_pd  *safw_identify_resp;
 };
 
@@ -1669,6 +1669,7 @@ struct aac_dev
 	u32			vector_cap;	/* MSI-X vector capab.*/
 	int			msi_enabled;	/* MSI/MSI-X enabled */
 	atomic_t		msix_counter;
+	u32			scan_counter;
 	struct msix_entry	msixentry[AAC_MAX_MSIX];
 	struct aac_msix_ctx	aac_msix[AAC_MAX_MSIX]; /* context */
 	struct aac_hba_map_info	hba_map[AAC_MAX_BUSES][AAC_MAX_TARGETS];

drivers/scsi/aacraid/commsup.c

@@ -1869,13 +1869,29 @@ int aac_check_health(struct aac_dev * aac)
 	return BlinkLED;
 }
 
+static inline int is_safw_raid_volume(struct aac_dev *aac, int bus, int target)
+{
+	return bus == CONTAINER_CHANNEL && target < aac->maximum_num_containers;
+}
+
+static inline int aac_is_safw_scan_count_equal(struct aac_dev *dev,
+	int bus, int target)
+{
+	return dev->hba_map[bus][target].scan_counter == dev->scan_counter;
+}
+
+static int aac_is_safw_target_valid(struct aac_dev *dev, int bus, int target)
+{
+	if (is_safw_raid_volume(dev, bus, target))
+		return dev->fsa_dev[target].valid;
+	else
+		return aac_is_safw_scan_count_equal(dev, bus, target);
+}
 
 static void aac_resolve_luns(struct aac_dev *dev)
 {
 	int bus, target, channel;
 	struct scsi_device *sdev;
-	u8 devtype;
-	u8 new_devtype;
 
 	for (bus = 0; bus < AAC_MAX_BUSES; bus++) {
 		for (target = 0; target < AAC_MAX_TARGETS; target++) {
@@ -1885,24 +1901,19 @@ static void aac_resolve_luns(struct aac_dev *dev)
 			else
 				channel = aac_phys_to_logical(bus);
 
-			devtype = dev->hba_map[bus][target].devtype;
-			new_devtype = dev->hba_map[bus][target].new_devtype;
-
 			sdev = scsi_device_lookup(dev->scsi_host_ptr, channel,
 					target, 0);
 
-			if (!sdev && new_devtype)
+			if (!sdev && aac_is_safw_target_valid(dev, bus, target))
 				scsi_add_device(dev->scsi_host_ptr, channel,
 						target, 0);
-			else if (sdev && new_devtype != devtype)
+			else if (sdev && aac_is_safw_target_valid(dev,
+								bus, target))
 				scsi_remove_device(sdev);
-			else if (sdev && new_devtype == devtype)
-				scsi_rescan_device(&sdev->sdev_gendev);
 
 			if (sdev)
 				scsi_device_put(sdev);
 
-			dev->hba_map[bus][target].devtype = new_devtype;
 		}
 	}
 }
@@ -1917,9 +1928,8 @@ static void aac_resolve_luns(struct aac_dev *dev)
  */
 static void aac_handle_sa_aif(struct aac_dev *dev, struct fib *fibptr)
 {
-	int i, bus, target, container, rcode = 0;
+	int i;
 	u32 events = 0;
-	struct scsi_device *sdev;
 
 	if (fibptr->hbacmd_size & SA_AIF_HOTPLUG)
 		events = SA_AIF_HOTPLUG;
@@ -1941,32 +1951,9 @@ static void aac_handle_sa_aif(struct aac_dev *dev, struct fib *fibptr)
 	case SA_AIF_LDEV_CHANGE:
 	case SA_AIF_BPCFG_CHANGE:
 
-		for (bus = 0; bus < AAC_MAX_BUSES; bus++)
-			for (target = 0; target < AAC_MAX_TARGETS; target++)
-				dev->hba_map[bus][target].new_devtype = 0;
-
-		rcode = aac_setup_safw_adapter(dev, AAC_RESCAN);
+		aac_setup_safw_adapter(dev, AAC_RESCAN);
 
 		aac_resolve_luns(dev);
-
-		for (container = 0; container <
-			dev->maximum_num_containers; ++container) {
-			sdev = scsi_device_lookup(dev->scsi_host_ptr,
-					CONTAINER_CHANNEL,
-					container, 0);
-			if (dev->fsa_dev[container].valid && !sdev) {
-				scsi_add_device(dev->scsi_host_ptr,
-					CONTAINER_CHANNEL,
-					container, 0);
-			} else if (!dev->fsa_dev[container].valid &&
-				sdev) {
-				scsi_remove_device(sdev);
-				scsi_device_put(sdev);
-			} else if (sdev) {
-				scsi_rescan_device(&sdev->sdev_gendev);
-				scsi_device_put(sdev);
-			}
-		}
 		break;
 
 	case SA_AIF_BPSTAT_CHANGE: