diff options
Diffstat (limited to 'drivers/base/power/wakeup.c')
| -rw-r--r-- | drivers/base/power/wakeup.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/base/power/wakeup.c b/drivers/base/power/wakeup.c index 77262009f89d..7b5ad9a5a6b6 100644 --- a/drivers/base/power/wakeup.c +++ b/drivers/base/power/wakeup.c @@ -351,6 +351,20 @@ int device_set_wakeup_enable(struct device *dev, bool enable) } EXPORT_SYMBOL_GPL(device_set_wakeup_enable); +/** + * wakeup_source_not_registered - validate the given wakeup source. + * @ws: Wakeup source to be validated. + */ +static bool wakeup_source_not_registered(struct wakeup_source *ws) +{ + /* + * Use timer struct to check if the given source is initialized + * by wakeup_source_add. + */ + return ws->timer.function != pm_wakeup_timer_fn || + ws->timer.data != (unsigned long)ws; +} + /* * The functions below use the observation that each wakeup event starts a * period in which the system should not be suspended. The moment this period @@ -391,6 +405,10 @@ static void wakeup_source_activate(struct wakeup_source *ws) { unsigned int cec; + if (WARN_ONCE(wakeup_source_not_registered(ws), + "unregistered wakeup source\n")) + return; + /* * active wakeup source should bring the system * out of PM_SUSPEND_FREEZE state |