[WATCHDOG] i8xx_tco.c-request_region-patch

Fix: in i8xx_tco.c, during the initialisation, the driver accesses io
without checking if the port is free.

drivers/char/watchdog/i8xx_tco.c

@@ -415,12 +415,15 @@ static unsigned char __init i8xx_tco_getdevice (void)
 			}
 		}
 		/* Set the TCO_EN bit in SMI_EN register */
+		if (!request_region (SMI_EN + 1, 1, "i8xx TCO")) {
+			printk (KERN_ERR PFX "I/O address 0x%04x already in use\n",
+				SMI_EN + 1);
+			return 0;
+		}
 		val1 = inb (SMI_EN + 1);
 		val1 &= 0xdf;
 		outb (val1, SMI_EN + 1);
-		/* Clear out the (probably old) status */
-		outb (0, TCO1_STS);
-		outb (3, TCO2_STS);
+		release_region (SMI_EN + 1, 1);
 		return 1;
 	}
 	return 0;
@@ -443,6 +446,10 @@ static int __init watchdog_init (void)
 		goto out;
 	}
 
+	/* Clear out the (probably old) status */
+	outb (0, TCO1_STS);
+	outb (3, TCO2_STS);
+
 	/* Check that the heartbeat value is within it's range ; if not reset to the default */
 	if (tco_timer_set_heartbeat (heartbeat)) {
 		heartbeat = WATCHDOG_HEARTBEAT;