hwmon: (w83781d) Request I/O ports individually for probing

[net-next-2.6.git] / drivers / hwmon / w83781d.c

diff --git a/drivers/hwmon/w83781d.c b/drivers/hwmon/w83781d.c
index 05f9225b6f944dd7007c752eb9c15786f41c6740..32d4adee73db650fc5ba2b2cc42586b12b642cd3 100644 (file)
--- a/drivers/hwmon/w83781d.c
+++ b/drivers/hwmon/w83781d.c
@@ -1793,17 +1793,17 @@ static int __init
 w83781d_isa_found(unsigned short address)
 {
        int val, save, found = 0;
-
-       /* We have to request the region in two parts because some
-          boards declare base+4 to base+7 as a PNP device */
-       if (!request_region(address, 4, "w83781d")) {
-               pr_debug("w83781d: Failed to request low part of region\n");
-               return 0;
-       }
-       if (!request_region(address + 4, 4, "w83781d")) {
-               pr_debug("w83781d: Failed to request high part of region\n");
-               release_region(address, 4);
-               return 0;
+       int port;
+
+       /* Some boards declare base+0 to base+7 as a PNP device, some base+4
+        * to base+7 and some base+5 to base+6. So we better request each port
+        * individually for the probing phase. */
+       for (port = address; port < address + W83781D_EXTENT; port++) {
+               if (!request_region(port, 1, "w83781d")) {
+                       pr_debug("w83781d: Failed to request port 0x%x\n",
+                                port);
+                       goto release;
+               }
        }
 
 #define REALLY_SLOW_IO
@@ -1877,8 +1877,8 @@ w83781d_isa_found(unsigned short address)
                        val == 0x30 ? "W83782D" : "W83781D", (int)address);
 
  release:
-       release_region(address + 4, 4);
-       release_region(address, 4);
+       for (port--; port >= address; port--)
+               release_region(port, 1);
        return found;
 }