VServer 1.9.2 (patch-2.6.8.1-vs1.9.2.diff)

[linux-2.6.git] / drivers / char / watchdog / w83877f_wdt.c

diff --git a/drivers/char/watchdog/w83877f_wdt.c b/drivers/char/watchdog/w83877f_wdt.c
index 2b657a5..bccbd4d 100644 (file)
--- a/drivers/char/watchdog/w83877f_wdt.c
+++ b/drivers/char/watchdog/w83877f_wdt.c
@@ -188,12 +188,8 @@ static void wdt_keepalive(void)
  * /dev/watchdog handling
  */
 
-static ssize_t fop_write(struct file * file, const char * buf, size_t count, loff_t * ppos)
+static ssize_t fop_write(struct file * file, const char __user * buf, size_t count, loff_t * ppos)
 {
-       /* We can't seek */
-       if(ppos != &file->f_pos)
-               return -ESPIPE;
-
        /* See if we got the magic character 'V' and reload the timer */
        if(count)
        {
@@ -230,7 +226,7 @@ static int fop_open(struct inode * inode, struct file * file)
 
        /* Good, fire up the show */
        wdt_startup();
-       return 0;
+       return nonseekable_open(inode, file);
 }
 
 static int fop_close(struct inode * inode, struct file * file)
@@ -249,6 +245,8 @@ static int fop_close(struct inode * inode, struct file * file)
 static int fop_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
        unsigned long arg)
 {
+       void __user *argp = (void __user *)arg;
+       int __user *p = argp;
        static struct watchdog_info ident=
        {
                .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
@@ -261,10 +259,10 @@ static int fop_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
                default:
                        return -ENOIOCTLCMD;
                case WDIOC_GETSUPPORT:
-                       return copy_to_user((struct watchdog_info *)arg, &ident, sizeof(ident))?-EFAULT:0;
+                       return copy_to_user(argp, &ident, sizeof(ident))?-EFAULT:0;
                case WDIOC_GETSTATUS:
                case WDIOC_GETBOOTSTATUS:
-                       return put_user(0, (int *)arg);
+                       return put_user(0, p);
                case WDIOC_KEEPALIVE:
                        wdt_keepalive();
                        return 0;
@@ -272,7 +270,7 @@ static int fop_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
                {
                        int new_options, retval = -EINVAL;
 
-                       if(get_user(new_options, (int *)arg))
+                       if(get_user(new_options, p))
                                return -EFAULT;
 
                        if(new_options & WDIOS_DISABLECARD) {
@@ -291,7 +289,7 @@ static int fop_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
                {
                        int new_timeout;
 
-                       if(get_user(new_timeout, (int *)arg))
+                       if(get_user(new_timeout, p))
                                return -EFAULT;
 
                        if(new_timeout < 1 || new_timeout > 3600) /* arbitrary upper limit */
@@ -302,7 +300,7 @@ static int fop_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
                        /* Fall through */
                }
                case WDIOC_GETTIMEOUT:
-                       return put_user(timeout, (int *)arg);
+                       return put_user(timeout, p);
        }
 }