mac80211: allow driver to impose WoWLAN restrictions

If the driver can't support WoWLAN in the current
state, this patch allows it to return 1 from the
suspend callback to do the normal deconfiguration
instead of using suspend/resume calls. Note that
if it does this, resume won't be called.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

include/net/mac80211.h

@@ -1628,6 +1628,10 @@ enum ieee80211_ampdu_mlme_action {
  *	ask the device to suspend. This is only invoked when WoWLAN is
  *	configured, otherwise the device is deconfigured completely and
  *	reconfigured at resume time.
+ *	The driver may also impose special conditions under which it
+ *	wants to use the "normal" suspend (deconfigure), say if it only
+ *	supports WoWLAN when the device is associated. In this case, it
+ *	must return 1 from this function.
  *
  * @resume: If WoWLAN was configured, this indicates that mac80211 is
  *	now resuming its operation, after this the device must be fully