ieee1394: add preprocessor constant for invalid csr address

Replace occurrences of the magic value ~(u64)0 for invalid
CSR address spaces by a named constant for better readability.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Ben Collins <bcollins@ubuntu.com>

6 files changed, 18 insertions, 20 deletions

diff --git a/drivers/ieee1394/csr1212.c b/drivers/ieee1394/csr1212.c
index 15773544234b..586f71e7346a 100644
--- a/drivers/ieee1394/csr1212.c
+++ b/drivers/ieee1394/csr1212.c
@@ -779,7 +779,7 @@ static int csr1212_append_new_cache(struct csr1212_csr *csr, size_t romsize)
         romsize = (romsize + (csr->max_rom - 1)) & ~(csr->max_rom - 1);
 
         csr_addr = csr->ops->allocate_addr_range(romsize, csr->max_rom, csr->private);
-        if (csr_addr == ~0ULL) {
+        if (csr_addr == CSR1212_INVALID_ADDR_SPACE) {
                 return CSR1212_ENOMEM;
         }
         if (csr_addr < CSR1212_REGISTER_SPACE_BASE) {
diff --git a/drivers/ieee1394/csr1212.h b/drivers/ieee1394/csr1212.h
index cecd5871f2de..17ddd72dee4e 100644
--- a/drivers/ieee1394/csr1212.h
+++ b/drivers/ieee1394/csr1212.h
@@ -192,6 +192,7 @@
 
 #define  CSR1212_EXTENDED_ROM_SIZE              (0x10000 * sizeof(u_int32_t))
 
+#define  CSR1212_INVALID_ADDR_SPACE             -1
 
 /* Config ROM image structures */
 struct csr1212_bus_info_block_img {
diff --git a/drivers/ieee1394/eth1394.c b/drivers/ieee1394/eth1394.c
index 3ec3b13e4917..cf80fed6163b 100644
--- a/drivers/ieee1394/eth1394.c
+++ b/drivers/ieee1394/eth1394.c
@@ -367,7 +367,7 @@ static int eth1394_probe(struct device *dev)
         spin_lock_init(&node_info->pdg.lock);
         INIT_LIST_HEAD(&node_info->pdg.list);
         node_info->pdg.sz = 0;
-        node_info->fifo = ETHER1394_INVALID_ADDR;
+        node_info->fifo = CSR1212_INVALID_ADDR_SPACE;
 
         ud->device.driver_data = node_info;
         new_node->ud = ud;
@@ -566,13 +566,11 @@ static void ether1394_add_host (struct hpsb_host *host)
         if (!(host->config_roms & HPSB_CONFIG_ROM_ENTRY_IP1394))
                 return;
 
-        fifo_addr = hpsb_allocate_and_register_addrspace(&eth1394_highlevel,
-                                                         host,
-                                                         &addr_ops,
-                                                         ETHER1394_REGION_ADDR_LEN,
-                                                         ETHER1394_REGION_ADDR_LEN,
-                                                         -1, -1);
-        if (fifo_addr == ~0ULL)
+        fifo_addr = hpsb_allocate_and_register_addrspace(
+                        &eth1394_highlevel, host, &addr_ops,
+                        ETHER1394_REGION_ADDR_LEN, ETHER1394_REGION_ADDR_LEN,
+                        CSR1212_INVALID_ADDR_SPACE, CSR1212_INVALID_ADDR_SPACE);
+        if (fifo_addr == CSR1212_INVALID_ADDR_SPACE)
                 goto out;
 
         /* We should really have our own alloc_hpsbdev() function in
@@ -1686,7 +1684,7 @@ static int ether1394_tx (struct sk_buff *skb, struct net_device *dev)
                         goto fail;
                 }
                 node_info = (struct eth1394_node_info*)node->ud->device.driver_data;
-                if (node_info->fifo == ETHER1394_INVALID_ADDR) {
+                if (node_info->fifo == CSR1212_INVALID_ADDR_SPACE) {
                         ret = -EAGAIN;
                         goto fail;
                 }
diff --git a/drivers/ieee1394/eth1394.h b/drivers/ieee1394/eth1394.h
index a77213cfc483..c45cbff9138d 100644
--- a/drivers/ieee1394/eth1394.h
+++ b/drivers/ieee1394/eth1394.h
@@ -32,8 +32,6 @@
  * S3200 (per Table 16-3 of IEEE 1394b-2002). */
 #define ETHER1394_REGION_ADDR_LEN       4096
 
-#define ETHER1394_INVALID_ADDR          ~0ULL
-
 /* GASP identifier numbers for IPv4 over IEEE 1394 */
 #define ETHER1394_GASP_SPECIFIER_ID     0x00005E
 #define ETHER1394_GASP_SPECIFIER_ID_HI  ((ETHER1394_GASP_SPECIFIER_ID >> 8) & 0xffff)
diff --git a/drivers/ieee1394/highlevel.c b/drivers/ieee1394/highlevel.c
index 29c5255b933c..165dcd669560 100644
--- a/drivers/ieee1394/highlevel.c
+++ b/drivers/ieee1394/highlevel.c
@@ -301,7 +301,7 @@ u64 hpsb_allocate_and_register_addrspace(struct hpsb_highlevel *hl,
 {
         struct hpsb_address_serve *as, *a1, *a2;
         struct list_head *entry;
-        u64 retval = ~0ULL;
+        u64 retval = CSR1212_INVALID_ADDR_SPACE;
         unsigned long flags;
         u64 align_mask = ~(alignment - 1);
 
@@ -314,9 +314,10 @@ u64 hpsb_allocate_and_register_addrspace(struct hpsb_highlevel *hl,
 
         /* default range,
          * avoids controller's posted write area (see OHCI 1.1 clause 1.5) */
-        if (start == ~0ULL && end == ~0ULL) {
+        if (start == CSR1212_INVALID_ADDR_SPACE &&
+            end   == CSR1212_INVALID_ADDR_SPACE) {
                 start = host->middle_addr_space;
-                end = CSR1212_ALL_SPACE_END;
+                end   = CSR1212_ALL_SPACE_END;
         }
 
         if (((start|end) & ~align_mask) || (start >= end) || (end > 0x1000000000000ULL)) {
@@ -360,7 +361,7 @@ u64 hpsb_allocate_and_register_addrspace(struct hpsb_highlevel *hl,
 
         write_unlock_irqrestore(&addr_space_lock, flags);
 
-        if (retval == ~0ULL) {
+        if (retval == CSR1212_INVALID_ADDR_SPACE) {
                 kfree(as);
         }
 
diff --git a/drivers/ieee1394/sbp2.c b/drivers/ieee1394/sbp2.c
index 975a56bfab3d..1d5ceb7ecc83 100644
--- a/drivers/ieee1394/sbp2.c
+++ b/drivers/ieee1394/sbp2.c
@@ -794,7 +794,7 @@ static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud
         scsi_id->ud = ud;
         scsi_id->speed_code = IEEE1394_SPEED_100;
         scsi_id->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100];
-        scsi_id->status_fifo_addr = ~0ULL;
+        scsi_id->status_fifo_addr = CSR1212_INVALID_ADDR_SPACE;
         atomic_set(&scsi_id->sbp2_login_complete, 0);
         INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_inuse);
         INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_completed);
@@ -848,7 +848,7 @@ static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud
                         &sbp2_highlevel, ud->ne->host, &sbp2_ops,
                         sizeof(struct sbp2_status_block), sizeof(quadlet_t),
                         ud->ne->host->low_addr_space, CSR1212_ALL_SPACE_END);
-        if (scsi_id->status_fifo_addr == ~0ULL) {
+        if (scsi_id->status_fifo_addr == CSR1212_INVALID_ADDR_SPACE) {
                 SBP2_ERR("failed to allocate status FIFO address range");
                 goto failed_alloc;
         }
@@ -1090,9 +1090,9 @@ static void sbp2_remove_device(struct scsi_id_instance_data *scsi_id)
                 SBP2_DMA_FREE("single query logins data");
         }
 
-        if (scsi_id->status_fifo_addr != ~0ULL)
+        if (scsi_id->status_fifo_addr != CSR1212_INVALID_ADDR_SPACE)
                 hpsb_unregister_addrspace(&sbp2_highlevel, hi->host,
-                        scsi_id->status_fifo_addr);
+                                          scsi_id->status_fifo_addr);
 
         scsi_id->ud->device.driver_data = NULL;