Source: MontaVista Software, Inc. 
MR:26833 
Type: Fix Bug 
Disposition: Submitted to Wim van Sebroek
Signed-off-by: Egorov Evgeny <eegorov@ru.mvista.com>
Description:
    This patch fix bug of watchdog driver's write fuction
    which allow to prevent wdt timeout. 

Index: linux-2.6.18/drivers/char/watchdog/davinci_wdt.c
===================================================================
--- linux-2.6.18.orig/drivers/char/watchdog/davinci_wdt.c
+++ linux-2.6.18/drivers/char/watchdog/davinci_wdt.c
@@ -133,13 +133,8 @@ static ssize_t
 davinci_wdt_write(struct file *file, const char *data, size_t len,
 		  loff_t *ppos)
 {
-	/*  Can't seek (pwrite) on this device  */
-	if (ppos != &file->f_pos)
-		return -ESPIPE;
-
 	if (len)
 		wdt_service();
-
 	return len;
 }