scsi: aacraid: Added macros to help loop through known buses and targets

Added macros to loop through the MAX SUPPORTED Buses and Targets. This
will make the code a bit easier to read.
Signed-off-by: NRaghava Aditya Renukunta <RaghavaAditya.Renukunta@microsemi.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/aacraid/aacraid.h

@@ -117,9 +117,13 @@ enum {
 /* Thor: 5 phys. buses: #0: empty, 1-4: 256 targets each */
 #define AAC_MAX_BUSES			5
 #define AAC_MAX_TARGETS		256
+#define AAC_BUS_TARGET_LOOP		(AAC_MAX_BUSES * AAC_MAX_TARGETS)
 #define AAC_MAX_NATIVE_SIZE		2048
 #define FW_ERROR_BUFFER_SIZE		512
 
+#define get_bus_number(x)	(x/AAC_MAX_TARGETS)
+#define get_target_number(x)	(x%AAC_MAX_TARGETS)
+
 /* Thor AIF events */
 #define SA_AIF_HOTPLUG			(1<<1)
 #define SA_AIF_HARDWARE		(1<<2)

drivers/scsi/aacraid/commsup.c

@@ -1890,31 +1890,31 @@ static int aac_is_safw_target_valid(struct aac_dev *dev, int bus, int target)
 
 static void aac_resolve_luns(struct aac_dev *dev)
 {
+	int i;
 	int bus, target, channel;
 	struct scsi_device *sdev;
 
-	for (bus = 0; bus < AAC_MAX_BUSES; bus++) {
-		for (target = 0; target < AAC_MAX_TARGETS; target++) {
+	for (i = 0; i < AAC_BUS_TARGET_LOOP; i++) {
 
-			if (bus == CONTAINER_CHANNEL)
-				channel = CONTAINER_CHANNEL;
-			else
-				channel = aac_phys_to_logical(bus);
+		bus = get_bus_number(i);
+		target = get_target_number(i);
 
-			sdev = scsi_device_lookup(dev->scsi_host_ptr, channel,
-					target, 0);
+		if (bus == CONTAINER_CHANNEL)
+			channel = CONTAINER_CHANNEL;
+		else
+			channel = aac_phys_to_logical(bus);
 
-			if (!sdev && aac_is_safw_target_valid(dev, bus, target))
-				scsi_add_device(dev->scsi_host_ptr, channel,
-						target, 0);
-			else if (sdev && aac_is_safw_target_valid(dev,
-								bus, target))
-				scsi_remove_device(sdev);
+		sdev = scsi_device_lookup(dev->scsi_host_ptr, channel,
+				target, 0);
 
-			if (sdev)
-				scsi_device_put(sdev);
+		if (!sdev && aac_is_safw_target_valid(dev, bus, target))
+			scsi_add_device(dev->scsi_host_ptr, channel,
+					target, 0);
+		else if (sdev && aac_is_safw_target_valid(dev, bus, target))
+			scsi_remove_device(sdev);
 
-		}
+		if (sdev)
+			scsi_device_put(sdev);
 	}
 }