mac80211: add basic support for WoWLAN

This adds basic support for the new WoWLAN
configuration in mac80211. The behaviour is
completely offloaded to the driver though,
with two new callbacks (suspend/resume).

Options for the driver include a complete
reconfiguration after wakeup, and exposing
all the triggers it wants to support.

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

1 files changed, 19 insertions, 0 deletions

diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index ef0560a2346a..d3fe2d237485 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -1125,9 +1125,27 @@ int ieee80211_reconfig(struct ieee80211_local *local)
         struct sta_info *sta;
         int res;
 
+#ifdef CONFIG_PM
         if (local->suspended)
                 local->resuming = true;
 
+        if (local->wowlan) {
+                local->wowlan = false;
+                res = drv_resume(local);
+                if (res < 0) {
+                        local->resuming = false;
+                        return res;
+                }
+                if (res == 0)
+                        goto wake_up;
+                WARN_ON(res > 1);
+                /*
+                 * res is 1, which means the driver requested
+                 * to go through a regular reset on wakeup.
+                 */
+        }
+#endif
+
         /* restart hardware */
         if (local->open_count) {
                 /*
@@ -1258,6 +1276,7 @@ int ieee80211_reconfig(struct ieee80211_local *local)
                 if (ieee80211_sdata_running(sdata))
                         ieee80211_enable_keys(sdata);
 
+ wake_up:
         ieee80211_wake_queues_by_reason(hw,
                         IEEE80211_QUEUE_STOP_REASON_SUSPEND);