1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/watchdog/max63xx_wdt.c b/drivers/watchdog/max63xx_wdt.c
index 6eb91d757604..3053ff05ca41 100644
--- a/drivers/watchdog/max63xx_wdt.c
+++ b/drivers/watchdog/max63xx_wdt.c
@@ -28,6 +28,7 @@
 #include <linux/uaccess.h>
 #include <linux/io.h>
 #include <linux/device.h>
+#include <linux/slab.h>
 
 #define DEFAULT_HEARTBEAT 60
 #define MAX_HEARTBEAT     60
@@ -153,9 +154,14 @@ static void max63xx_wdt_enable(struct max63xx_timeout *entry)
 
 static void max63xx_wdt_disable(void)
 {
+        u8 val;
+
         spin_lock(&io_lock);
 
-        __raw_writeb(3, wdt_base);
+        val = __raw_readb(wdt_base);
+        val &= ~MAX6369_WDSET;
+        val |= 3;
+        __raw_writeb(val, wdt_base);
 
         spin_unlock(&io_lock);