mac80211: clarify interface iteration and make it configurable

During hardware restart, all interfaces are iterated even
though they haven't been re-added to the driver, document
this behaviour. The same also happens during resume, which
is even more confusing since all of the interfaces were
previously removed from the driver. Make this optional so
drivers relying on the current behaviour can still use it,
but to let drivers that don't want this behaviour disable
it.

Also convert all API users, keeping the old semantics
except in hwsim, where the new normal ones are desired.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

5 files changed, 33 insertions, 23 deletions

diff --git a/drivers/net/wireless/ath/ath5k/base.c b/drivers/net/wireless/ath/ath5k/base.c
index 9f31cfa56cc0..cdd19232960c 100644
--- a/drivers/net/wireless/ath/ath5k/base.c
+++ b/drivers/net/wireless/ath/ath5k/base.c
@@ -511,8 +511,9 @@ ath5k_update_bssid_mask_and_opmode(struct ath5k_hw *ah,
 		ath5k_vif_iter(&iter_data, vif->addr, vif);
 
 	/* Get list of all active MAC addresses */
-	ieee80211_iterate_active_interfaces_atomic(ah->hw, ath5k_vif_iter,
-						   &iter_data);
+	ieee80211_iterate_active_interfaces_atomic(
+		ah->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
+		ath5k_vif_iter, &iter_data);
 	memcpy(ah->bssidmask, iter_data.mask, ETH_ALEN);
 
 	ah->opmode = iter_data.opmode;
@@ -3045,8 +3046,9 @@ ath5k_any_vif_assoc(struct ath5k_hw *ah)
 	iter_data.need_set_hw_addr = false;
 	iter_data.found_active = true;
 
-	ieee80211_iterate_active_interfaces_atomic(ah->hw, ath5k_vif_iter,
-						   &iter_data);
+	ieee80211_iterate_active_interfaces_atomic(
+		ah->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
+		ath5k_vif_iter, &iter_data);
 	return iter_data.any_assoc;
 }
 
diff --git a/drivers/net/wireless/ath/ath5k/mac80211-ops.c b/drivers/net/wireless/ath/ath5k/mac80211-ops.c
index 7a28538e6e05..1ea8c8795c8e 100644
--- a/drivers/net/wireless/ath/ath5k/mac80211-ops.c
+++ b/drivers/net/wireless/ath/ath5k/mac80211-ops.c
@@ -452,8 +452,9 @@ ath5k_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags,
 	iter_data.hw_macaddr = NULL;
 	iter_data.n_stas = 0;
 	iter_data.need_set_hw_addr = false;
-	ieee80211_iterate_active_interfaces_atomic(ah->hw, ath5k_vif_iter,
-						   &iter_data);
+	ieee80211_iterate_active_interfaces_atomic(
+		ah->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
+		ath5k_vif_iter, &iter_data);
 
 	/* Set up RX Filter */
 	if (iter_data.n_stas > 1) {
diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_beacon.c b/drivers/net/wireless/ath/ath9k/htc_drv_beacon.c
index f42d2eb6af99..1318d79f5c44 100644
--- a/drivers/net/wireless/ath/ath9k/htc_drv_beacon.c
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_beacon.c
@@ -587,9 +587,9 @@ static bool ath9k_htc_check_beacon_config(struct ath9k_htc_priv *priv,
 	    (priv->num_sta_vif > 1) &&
 	    (vif->type == NL80211_IFTYPE_STATION)) {
 		beacon_configured = false;
-		ieee80211_iterate_active_interfaces_atomic(priv->hw,
-							   ath9k_htc_beacon_iter,
-							   &beacon_configured);
+		ieee80211_iterate_active_interfaces_atomic(
+			priv->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
+			ath9k_htc_beacon_iter, &beacon_configured);
 
 		if (beacon_configured) {
 			ath_dbg(common, CONFIG,
diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_main.c b/drivers/net/wireless/ath/ath9k/htc_drv_main.c
index 66f6a74c508e..02cce95331d8 100644
--- a/drivers/net/wireless/ath/ath9k/htc_drv_main.c
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_main.c
@@ -127,8 +127,9 @@ static void ath9k_htc_vif_reconfig(struct ath9k_htc_priv *priv)
 	priv->rearm_ani = false;
 	priv->reconfig_beacon = false;
 
-	ieee80211_iterate_active_interfaces_atomic(priv->hw,
-						   ath9k_htc_vif_iter, priv);
+	ieee80211_iterate_active_interfaces_atomic(
+		priv->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
+		ath9k_htc_vif_iter, priv);
 	if (priv->rearm_ani)
 		ath9k_htc_start_ani(priv);
 
@@ -165,8 +166,9 @@ static void ath9k_htc_set_bssid_mask(struct ath9k_htc_priv *priv,
 		ath9k_htc_bssid_iter(&iter_data, vif->addr, vif);
 
 	/* Get list of all active MAC addresses */
-	ieee80211_iterate_active_interfaces_atomic(priv->hw, ath9k_htc_bssid_iter,
-						   &iter_data);
+	ieee80211_iterate_active_interfaces_atomic(
+		priv->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
+		ath9k_htc_bssid_iter, &iter_data);
 
 	memcpy(common->bssidmask, iter_data.mask, ETH_ALEN);
 	ath_hw_setbssidmask(common);
@@ -1144,8 +1146,9 @@ static void ath9k_htc_remove_interface(struct ieee80211_hw *hw,
 	 */
 	if ((vif->type == NL80211_IFTYPE_AP) && (priv->num_ap_vif == 0)) {
 		priv->rearm_ani = false;
-		ieee80211_iterate_active_interfaces_atomic(priv->hw,
-						   ath9k_htc_vif_iter, priv);
+		ieee80211_iterate_active_interfaces_atomic(
+			priv->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
+			ath9k_htc_vif_iter, priv);
 		if (!priv->rearm_ani)
 			ath9k_htc_stop_ani(priv);
 	}
@@ -1466,8 +1469,9 @@ static void ath9k_htc_bss_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
 static void ath9k_htc_choose_set_bssid(struct ath9k_htc_priv *priv)
 {
 	if (priv->num_sta_assoc_vif == 1) {
-		ieee80211_iterate_active_interfaces_atomic(priv->hw,
-							   ath9k_htc_bss_iter, priv);
+		ieee80211_iterate_active_interfaces_atomic(
+			priv->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
+			ath9k_htc_bss_iter, priv);
 		ath9k_htc_set_bssid(priv);
 	}
 }
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index 578a7234aa56..c084532291a1 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -924,8 +924,9 @@ void ath9k_calculate_iter_data(struct ieee80211_hw *hw,
 		ath9k_vif_iter(iter_data, vif->addr, vif);
 
 	/* Get list of all active MAC addresses */
-	ieee80211_iterate_active_interfaces_atomic(sc->hw, ath9k_vif_iter,
-						   iter_data);
+	ieee80211_iterate_active_interfaces_atomic(
+		sc->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
+		ath9k_vif_iter, iter_data);
 }
 
 /* Called with sc->mutex held. */
@@ -975,8 +976,9 @@ static void ath9k_calculate_summary_state(struct ieee80211_hw *hw,
 	if (ah->opmode == NL80211_IFTYPE_STATION &&
 	    old_opmode == NL80211_IFTYPE_AP &&
 	    test_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags)) {
-		ieee80211_iterate_active_interfaces_atomic(sc->hw,
-						   ath9k_sta_vif_iter, sc);
+		ieee80211_iterate_active_interfaces_atomic(
+			sc->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
+			ath9k_sta_vif_iter, sc);
 	}
 }
 
@@ -1505,8 +1507,9 @@ static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
 				clear_bit(SC_OP_BEACONS, &sc->sc_flags);
 		}
 
-		ieee80211_iterate_active_interfaces_atomic(sc->hw,
-						   ath9k_bss_assoc_iter, sc);
+		ieee80211_iterate_active_interfaces_atomic(
+			sc->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
+			ath9k_bss_assoc_iter, sc);
 
 		if (!test_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags) &&
 		    ah->opmode == NL80211_IFTYPE_STATION) {