static int wdt977_open(struct inode *inode, struct file *file)
{
/* If the watchdog is alive we don't need to start it again */
if( test_and_set_bit(0,&timer_alive) )
return -EBUSY;
if (nowayout)
__module_get(THIS_MODULE);
wdt977_start();
return nonseekable_open(inode, file);
}
static int wdt977_open(struct inode *inode, struct file *file)
{
/* */
if (test_and_set_bit(0, &timer_alive))
return -EBUSY;
if (nowayout)
__module_get(THIS_MODULE);
wdt977_start();
return nonseekable_open(inode, file);
}
static int wdt977_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
int status;
int new_options, retval = -EINVAL;
int new_timeout;
union {
struct watchdog_info __user *ident;
int __user *i;
} uarg;
uarg.i = (int __user *)arg;
switch(cmd)
{
default:
return -ENOIOCTLCMD;
case WDIOC_GETSUPPORT:
return copy_to_user(uarg.ident, &ident,
sizeof(ident)) ? -EFAULT : 0;
case WDIOC_GETSTATUS:
wdt977_get_status(&status);
return put_user(status, uarg.i);
case WDIOC_GETBOOTSTATUS:
return put_user(0, uarg.i);
case WDIOC_KEEPALIVE:
wdt977_keepalive();
return 0;
case WDIOC_SETOPTIONS:
if (get_user (new_options, uarg.i))
return -EFAULT;
if (new_options & WDIOS_DISABLECARD) {
wdt977_stop();
retval = 0;
}
if (new_options & WDIOS_ENABLECARD) {
wdt977_start();
retval = 0;
}
return retval;
case WDIOC_SETTIMEOUT:
if (get_user(new_timeout, uarg.i))
return -EFAULT;
if (wdt977_set_timeout(new_timeout))
return -EINVAL;
wdt977_keepalive();
/* Fall */
case WDIOC_GETTIMEOUT:
return put_user(timeout, uarg.i);
}
}