[SCSI] zfcp: Simplify mask lookups for incoming RSCNs

Use an array for looking up the mask corresponding to the 2-bit
information instead of the switch/case.

Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Acked-by: Felix Beck <felix@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

2 files changed, 15 insertions, 30 deletions

diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h
index 9ca91316e068..4f3b7a5ce7fe 100644
--- a/drivers/s390/scsi/zfcp_def.h
+++ b/drivers/s390/scsi/zfcp_def.h
@@ -159,20 +159,6 @@ struct fcp_rscn_element {
         u32 nport_did:24;
 } __attribute__((packed));
 
-#define ZFCP_PORT_ADDRESS   0x0
-#define ZFCP_AREA_ADDRESS   0x1
-#define ZFCP_DOMAIN_ADDRESS 0x2
-#define ZFCP_FABRIC_ADDRESS 0x3
-
-#define ZFCP_PORTS_RANGE_PORT   0xFFFFFF
-#define ZFCP_PORTS_RANGE_AREA   0xFFFF00
-#define ZFCP_PORTS_RANGE_DOMAIN 0xFF0000
-#define ZFCP_PORTS_RANGE_FABRIC 0x000000
-
-#define ZFCP_NO_PORTS_PER_AREA    0x100
-#define ZFCP_NO_PORTS_PER_DOMAIN  0x10000
-#define ZFCP_NO_PORTS_PER_FABRIC  0x1000000
-
 /* see fc-ph */
 struct fcp_logo {
         u32 command;
diff --git a/drivers/s390/scsi/zfcp_fc.c b/drivers/s390/scsi/zfcp_fc.c
index f009f2a7ec3e..396f05ed912f 100644
--- a/drivers/s390/scsi/zfcp_fc.c
+++ b/drivers/s390/scsi/zfcp_fc.c
@@ -11,6 +11,20 @@
 
 #include "zfcp_ext.h"
 
+enum rscn_address_format {
+        RSCN_PORT_ADDRESS       = 0x0,
+        RSCN_AREA_ADDRESS       = 0x1,
+        RSCN_DOMAIN_ADDRESS     = 0x2,
+        RSCN_FABRIC_ADDRESS     = 0x3,
+};
+
+static u32 rscn_range_mask[] = {
+        [RSCN_PORT_ADDRESS]             = 0xFFFFFF,
+        [RSCN_AREA_ADDRESS]             = 0xFFFF00,
+        [RSCN_DOMAIN_ADDRESS]           = 0xFF0000,
+        [RSCN_FABRIC_ADDRESS]           = 0x000000,
+};
+
 struct ct_iu_gpn_ft_req {
         struct ct_hdr header;
         u8 flags;
@@ -160,22 +174,7 @@ static void zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req)
         for (i = 1; i < no_entries; i++) {
                 /* skip head and start with 1st element */
                 fcp_rscn_element++;
-                switch (fcp_rscn_element->addr_format) {
-                case ZFCP_PORT_ADDRESS:
-                        range_mask = ZFCP_PORTS_RANGE_PORT;
-                        break;
-                case ZFCP_AREA_ADDRESS:
-                        range_mask = ZFCP_PORTS_RANGE_AREA;
-                        break;
-                case ZFCP_DOMAIN_ADDRESS:
-                        range_mask = ZFCP_PORTS_RANGE_DOMAIN;
-                        break;
-                case ZFCP_FABRIC_ADDRESS:
-                        range_mask = ZFCP_PORTS_RANGE_FABRIC;
-                        break;
-                default:
-                        continue;
-                }
+                range_mask = rscn_range_mask[fcp_rscn_element->addr_format];
                 _zfcp_fc_incoming_rscn(fsf_req, range_mask, fcp_rscn_element);
         }
         schedule_work(&fsf_req->adapter->scan_work);