mac80211: Add software scan notifiers

This adds optional notifier functions for software scan.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

2 files changed, 13 insertions, 0 deletions

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index e01c63aad66c..12a52efcd0d1 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -1324,6 +1324,12 @@ enum ieee80211_ampdu_mlme_action {
  *      because the hardware is turned off! Anything else is a bug!
  *      Returns a negative error code which will be seen in userspace.
  *
+ * @sw_scan_start: Notifier function that is called just before a software scan
+ *      is started. Can be NULL, if the driver doesn't need this notification.
+ *
+ * @sw_scan_complete: Notifier function that is called just after a software scan
+ *      finished. Can be NULL, if the driver doesn't need this notification.
+ *
  * @get_stats: Return low-level statistics.
  *      Returns zero if statistics are available.
  *
@@ -1403,6 +1409,8 @@ struct ieee80211_ops {
                         u32 iv32, u16 *phase1key);
         int (*hw_scan)(struct ieee80211_hw *hw,
                        struct cfg80211_scan_request *req);
+        void (*sw_scan_start)(struct ieee80211_hw *hw);
+        void (*sw_scan_complete)(struct ieee80211_hw *hw);
         int (*get_stats)(struct ieee80211_hw *hw,
                          struct ieee80211_low_level_stats *stats);
         void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx,
diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c
index 23f4de274744..0e81e1633a66 100644
--- a/net/mac80211/scan.c
+++ b/net/mac80211/scan.c
@@ -245,6 +245,9 @@ void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted)
         netif_addr_unlock(local->mdev);
         netif_tx_unlock_bh(local->mdev);
 
+        if (local->ops->sw_scan_complete)
+                local->ops->sw_scan_complete(local_to_hw(local));
+
         mutex_lock(&local->iflist_mtx);
         list_for_each_entry(sdata, &local->interfaces, list) {
                 if (!netif_running(sdata->dev))
@@ -395,6 +398,8 @@ int ieee80211_start_scan(struct ieee80211_sub_if_data *scan_sdata,
         }
 
         local->sw_scanning = true;
+        if (local->ops->sw_scan_start)
+                local->ops->sw_scan_start(local_to_hw(local));
 
         mutex_lock(&local->iflist_mtx);
         list_for_each_entry(sdata, &local->interfaces, list) {