diff options
Diffstat (limited to 'drivers/watchdog/wd_core.c')
| -rw-r--r-- | drivers/watchdog/wd_core.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/watchdog/wd_core.c b/drivers/watchdog/wd_core.c index 845234114d..425e78551a 100644 --- a/drivers/watchdog/wd_core.c +++ b/drivers/watchdog/wd_core.c @@ -31,6 +31,16 @@ static const char *watchdog_name(struct watchdog *wd) return "unknown"; } +static int watchdog_set_cur(struct param_d *param, void *priv) +{ + struct watchdog *wd = priv; + + if (wd->timeout_cur > wd->timeout_max) + return -EINVAL; + + return 0; +} + static int watchdog_register_dev(struct watchdog *wd, const char *name, int id) { wd->dev.parent = wd->hwdev; @@ -63,11 +73,19 @@ int watchdog_register(struct watchdog *wd) if (!wd->timeout_max) wd->timeout_max = 60 * 60 * 24; + if (!wd->timeout_cur || wd->timeout_cur > wd->timeout_max) + wd->timeout_cur = wd->timeout_max; + p = dev_add_param_uint32_ro(&wd->dev, "timeout_max", &wd->timeout_max, "%u"); if (IS_ERR(p)) return PTR_ERR(p); + p = dev_add_param_uint32(&wd->dev, "timeout_cur", watchdog_set_cur, NULL, + &wd->timeout_cur, "%u", wd); + if (IS_ERR(p)) + return PTR_ERR(p); + list_add_tail(&wd->list, &watchdog_list); pr_debug("registering watchdog %s with priority %d\n", watchdog_name(wd), |