mac80211: allow driver to return error from sched_scan_stop

In order to solve races with sched_scan_stop, it is necessary
for the driver to be able to return an error to propagate that
to cfg80211 so it doesn't send an event.

Reviewed-by: Alexander Bondar <alexander.bondar@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

2 files changed, 8 insertions, 4 deletions

diff --git a/drivers/net/wireless/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/iwlwifi/mvm/mac80211.c
index beaf8140abbf..7492fc0f2766 100644
--- a/drivers/net/wireless/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/iwlwifi/mvm/mac80211.c
@@ -1746,14 +1746,16 @@ out:
         return ret;
 }
 
-static void iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
-                                        struct ieee80211_vif *vif)
+static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
+                                       struct ieee80211_vif *vif)
 {
         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 
         mutex_lock(&mvm->mutex);
         iwl_mvm_sched_scan_stop(mvm);
         mutex_unlock(&mvm->mutex);
+
+        return 0;
 }
 
 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
diff --git a/drivers/net/wireless/ti/wlcore/main.c b/drivers/net/wireless/ti/wlcore/main.c
index 7aae5b3a0c2c..4175a57ac9f5 100644
--- a/drivers/net/wireless/ti/wlcore/main.c
+++ b/drivers/net/wireless/ti/wlcore/main.c
@@ -3668,8 +3668,8 @@ out:
         return ret;
 }
 
-static void wl1271_op_sched_scan_stop(struct ieee80211_hw *hw,
-                                      struct ieee80211_vif *vif)
+static int wl1271_op_sched_scan_stop(struct ieee80211_hw *hw,
+                                     struct ieee80211_vif *vif)
 {
         struct wl1271 *wl = hw->priv;
         struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif);
@@ -3691,6 +3691,8 @@ static void wl1271_op_sched_scan_stop(struct ieee80211_hw *hw,
         wl1271_ps_elp_sleep(wl);
 out:
         mutex_unlock(&wl->mutex);
+
+        return 0;
 }
 
 static int wl1271_op_set_frag_threshold(struct ieee80211_hw *hw, u32 value)