1 files changed, 9 insertions, 7 deletions

diff --git a/drivers/net/can/sja1000/ems_pci.c b/drivers/net/can/sja1000/ems_pci.c
index 7d84b8ac9c1c..fd04789d3370 100644
--- a/drivers/net/can/sja1000/ems_pci.c
+++ b/drivers/net/can/sja1000/ems_pci.c
@@ -94,12 +94,14 @@ struct ems_pci_card {
 #define EMS_PCI_CDR             (CDR_CBP | CDR_CLKOUT_MASK)
 
 #define EMS_PCI_V1_BASE_BAR     1
-#define EMS_PCI_V1_MEM_SIZE     4096
+#define EMS_PCI_V1_CONF_SIZE    4096 /* size of PITA control area */
 #define EMS_PCI_V2_BASE_BAR     2
-#define EMS_PCI_V2_MEM_SIZE     128
+#define EMS_PCI_V2_CONF_SIZE    128 /* size of PLX control area */
 #define EMS_PCI_CAN_BASE_OFFSET 0x400 /* offset where the controllers starts */
 #define EMS_PCI_CAN_CTRL_SIZE   0x200 /* memory size for each controller */
 
+#define EMS_PCI_BASE_SIZE  4096 /* size of controller area */
+
 static struct pci_device_id ems_pci_tbl[] = {
         /* CPC-PCI v1 */
         {PCI_VENDOR_ID_SIEMENS, 0x2104, PCI_ANY_ID, PCI_ANY_ID,},
@@ -224,7 +226,7 @@ static int __devinit ems_pci_add_card(struct pci_dev *pdev,
         struct sja1000_priv *priv;
         struct net_device *dev;
         struct ems_pci_card *card;
-        int max_chan, mem_size, base_bar;
+        int max_chan, conf_size, base_bar;
         int err, i;
 
         /* Enabling PCI device */
@@ -251,22 +253,22 @@ static int __devinit ems_pci_add_card(struct pci_dev *pdev,
                 card->version = 2; /* CPC-PCI v2 */
                 max_chan = EMS_PCI_V2_MAX_CHAN;
                 base_bar = EMS_PCI_V2_BASE_BAR;
-                mem_size = EMS_PCI_V2_MEM_SIZE;
+                conf_size = EMS_PCI_V2_CONF_SIZE;
         } else {
                 card->version = 1; /* CPC-PCI v1 */
                 max_chan = EMS_PCI_V1_MAX_CHAN;
                 base_bar = EMS_PCI_V1_BASE_BAR;
-                mem_size = EMS_PCI_V1_MEM_SIZE;
+                conf_size = EMS_PCI_V1_CONF_SIZE;
         }
 
         /* Remap configuration space and controller memory area */
-        card->conf_addr = pci_iomap(pdev, 0, mem_size);
+        card->conf_addr = pci_iomap(pdev, 0, conf_size);
         if (card->conf_addr == NULL) {
                 err = -ENOMEM;
                 goto failure_cleanup;
         }
 
-        card->base_addr = pci_iomap(pdev, base_bar, mem_size);
+        card->base_addr = pci_iomap(pdev, base_bar, EMS_PCI_BASE_SIZE);
         if (card->base_addr == NULL) {
                 err = -ENOMEM;
                 goto failure_cleanup;