1 files changed, 13 insertions, 8 deletions

diff --git a/drivers/hwmon/w83627hf.c b/drivers/hwmon/w83627hf.c
index 7f6f7280878d..494274d27f01 100644
--- a/drivers/hwmon/w83627hf.c
+++ b/drivers/hwmon/w83627hf.c
@@ -142,10 +142,14 @@ superio_exit(void)
 #define WINB_BASE_REG 0x60
 /* Constants specified below */
 
-/* Length of ISA address segment */
-#define WINB_EXTENT 8
+/* Alignment of the base address */
+#define WINB_ALIGNMENT		~7
 
-/* Where are the ISA address/data registers relative to the base address */
+/* Offset & size of I/O region we are interested in */
+#define WINB_REGION_OFFSET	5
+#define WINB_REGION_SIZE	2
+
+/* Where are the sensors address/data registers relative to the base address */
 #define W83781D_ADDR_REG_OFFSET 5
 #define W83781D_DATA_REG_OFFSET 6
 
@@ -981,7 +985,7 @@ static int __init w83627hf_find(int sioaddr, unsigned short *addr)
 	superio_select(W83627HF_LD_HWM);
 	val = (superio_inb(WINB_BASE_REG) << 8) |
 	       superio_inb(WINB_BASE_REG + 1);
-	*addr = val & ~(WINB_EXTENT - 1);
+	*addr = val & WINB_ALIGNMENT;
 	if (*addr == 0 && force_addr == 0) {
 		superio_exit();
 		return -ENODEV;
@@ -1000,9 +1004,10 @@ static int w83627hf_detect(struct i2c_adapter *adapter)
 	const char *client_name = "";
 
 	if(force_addr)
-		address = force_addr & ~(WINB_EXTENT - 1);
+		address = force_addr & WINB_ALIGNMENT;
 
-	if (!request_region(address, WINB_EXTENT, w83627hf_driver.name)) {
+	if (!request_region(address + WINB_REGION_OFFSET, WINB_REGION_SIZE,
+	                    w83627hf_driver.name)) {
 		err = -EBUSY;
 		goto ERROR0;
 	}
@@ -1148,7 +1153,7 @@ static int w83627hf_detect(struct i2c_adapter *adapter)
       ERROR2:
 	kfree(data);
       ERROR1:
-	release_region(address, WINB_EXTENT);
+	release_region(address + WINB_REGION_OFFSET, WINB_REGION_SIZE);
       ERROR0:
 	return err;
 }
@@ -1163,7 +1168,7 @@ static int w83627hf_detach_client(struct i2c_client *client)
 	if ((err = i2c_detach_client(client)))
 		return err;
 
-	release_region(client->addr, WINB_EXTENT);
+	release_region(client->addr + WINB_REGION_OFFSET, WINB_REGION_SIZE);
 	kfree(data);
 
 	return 0;