ath9k_htc: Set RX filter based to allow broadcast Action frame RX

Advertise support for multicast frame registration and update the RX
filter based on the recently added FIF_MCAST_ACTION to allow broadcast
Action frames to be received. This is needed for Device Provisioning
Protocol (DPP) use cases that use broadcast Public Action frames.
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200426084733.7889-2-jouni@codeaurora.org

drivers/net/wireless/ath/ath9k/htc_drv_init.c

@@ -780,6 +780,8 @@ static void ath9k_set_hw_capab(struct ath9k_htc_priv *priv,
 	SET_IEEE80211_PERM_ADDR(hw, common->macaddr);
 
 	wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
+	wiphy_ext_feature_set(hw->wiphy,
+			      NL80211_EXT_FEATURE_MULTICAST_REGISTRATIONS);
 }
 
 static int ath9k_init_firmware_version(struct ath9k_htc_priv *priv)

drivers/net/wireless/ath/ath9k/htc_drv_main.c

@@ -1251,6 +1251,7 @@ static int ath9k_htc_config(struct ieee80211_hw *hw, u32 changed)
 	FIF_OTHER_BSS |				\
 	FIF_BCN_PRBRESP_PROMISC |		\
 	FIF_PROBE_REQ |				\
+	FIF_MCAST_ACTION |			\
 	FIF_FCSFAIL)
 
 static void ath9k_htc_configure_filter(struct ieee80211_hw *hw,

drivers/net/wireless/ath/ath9k/htc_drv_txrx.c

@@ -893,7 +893,8 @@ u32 ath9k_htc_calcrxfilter(struct ath9k_htc_priv *priv)
 	if (priv->rxfilter & FIF_PSPOLL)
 		rfilt |= ATH9K_RX_FILTER_PSPOLL;
 
-	if (priv->nvifs > 1 || priv->rxfilter & FIF_OTHER_BSS)
+	if (priv->nvifs > 1 ||
+	    priv->rxfilter & (FIF_OTHER_BSS | FIF_MCAST_ACTION))
 		rfilt |= ATH9K_RX_FILTER_MCAST_BCAST_ALL;
 
 	return rfilt;