ath5k: disable HW crypto in management frame

Hardware support for MFP is not available in ath5k. Thus,
this implementation allows the mac80211 stack to do the
actuall crypto operation.
Signed-off-by: Chun-Yeow Yeoh <yeohchunyeow@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath5k/base.c

@@ -2446,6 +2446,7 @@ ath5k_init_ah(struct ath5k_hw *ah, const struct ath_bus_ops *bus_ops)
 	hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
 			IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
 			IEEE80211_HW_SIGNAL_DBM |
+			IEEE80211_HW_MFP_CAPABLE |
 			IEEE80211_HW_REPORTS_TX_ACK_STATUS;
 
 	hw->wiphy->interface_modes =

drivers/net/wireless/ath/ath5k/mac80211-ops.c

@@ -489,6 +489,9 @@ ath5k_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 	if (ath5k_modparam_nohwcrypt)
 		return -EOPNOTSUPP;
 
+	if (key->flags & IEEE80211_KEY_FLAG_RX_MGMT)
+		return -EOPNOTSUPP;
+
 	if (vif->type == NL80211_IFTYPE_ADHOC &&
 	    (key->cipher == WLAN_CIPHER_SUITE_TKIP ||
 	     key->cipher == WLAN_CIPHER_SUITE_CCMP) &&