Cancel a delayed work
bool cancel_delayed_work(struct delayed_work * dwork);
dwork
delayed_work to cancel
Kill off a pending delayed_work.
true if dwork was pending and canceled; false if it wasn't pending.
The work callback function may still be running on return, unless it returns true and the work doesn't re-arm itself. Explicitly flush or use cancel_delayed_work_sync to wait on it.
This function is safe to call from any context including IRQ handler.