/**
* watchdog_init_timeout() - initialize the timeout field
* @timeout_parm: timeout module parameter
* @dev: Device that stores the timeout-sec property
*
* Initialize the timeout field of the watchdog_device struct with either the
* timeout module parameter (if it is valid value) or the timeout-sec property
* (only if it is a valid value and the timeout_parm is out of bounds).
* If none of them are valid then we keep the old value (which should normally
* be the default timeout value.
*
* A zero is returned on success and -EINVAL for failure.
*/
int watchdog_init_timeout(struct watchdog_device *wdd,
unsigned int timeout_parm, struct device *dev)
{
unsigned int t = 0;
int ret = 0;
watchdog_check_min_max_timeout(wdd);
/* try to get the timeout module parameter first */
if (!watchdog_timeout_invalid(wdd, timeout_parm) && timeout_parm) {
wdd->timeout = timeout_parm;
return ret;
}
if (timeout_parm)
ret = -EINVAL;
/* try to get the timeout_sec property */
if (dev == NULL || dev->of_node == NULL)
return ret;
of_property_read_u32(dev->of_node, "timeout-sec", &t);
if (!watchdog_timeout_invalid(wdd, t) && t)
wdd->timeout = t;
else
ret = -EINVAL;
return ret;
}
static int watchdog_set_timeout(struct watchdog_device *wdd,
unsigned int timeout)
{
int err = 0;
if (!(wdd->info->options & WDIOF_SETTIMEOUT))
return -EOPNOTSUPP;
if (watchdog_timeout_invalid(wdd, timeout))
return -EINVAL;
if (wdd->ops->set_timeout)
err = wdd->ops->set_timeout(wdd, timeout);
else
wdd->timeout = timeout;
watchdog_update_worker(wdd);
return err;
}
static int watchdog_set_timeout(struct watchdog_device *wdd,
unsigned int timeout)
{
int err;
if (!wdd->ops->set_timeout || !(wdd->info->options & WDIOF_SETTIMEOUT))
return -EOPNOTSUPP;
if (watchdog_timeout_invalid(wdd, timeout))
return -EINVAL;
mutex_lock(&wdd->lock);
if (test_bit(WDOG_UNREGISTERED, &wdd->status)) {
err = -ENODEV;
goto out_timeout;
}
err = wdd->ops->set_timeout(wdd, timeout);
out_timeout:
mutex_unlock(&wdd->lock);
return err;
}
static int watchdog_set_timeout(struct watchdog_device *wdd,
unsigned int timeout)
{
int err = 0;
if (!(wdd->info->options & WDIOF_SETTIMEOUT))
return -EOPNOTSUPP;
if (watchdog_timeout_invalid(wdd, timeout))
return -EINVAL;
if (wdd->ops->set_timeout) {
err = wdd->ops->set_timeout(wdd, timeout);
} else {
wdd->timeout = timeout;
/* Disable pretimeout if it doesn't fit the new timeout */
if (wdd->pretimeout >= wdd->timeout)
wdd->pretimeout = 0;
}
watchdog_update_worker(wdd);
return err;
}
