When an epoll_event, that has the EPOLLWAKEUP flag set, is ready, a
wakeup_source will be active to prevent suspend. This can be used to
handle wakeup events from a driver that support poll, e.g. input, if
that driver wakes up the waitqueue passed to epoll before allowing
suspend.
Signed-off-by: NArve Hjønnevåg <arve@android.com>
Reviewed-by: NNeilBrown <neilb@suse.de>
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>