p54: connect to 11w protected networks

Previously, it was not possible to connect to
networks which requires 11w to be supported by
the stations.

Note:

As all current (and old) firmwares corrupt
incoming, protected management frames, the
decryption offloading needs to be disabled.
This will be done automatically if needed.
Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/p54/main.c

@@ -515,6 +515,17 @@ static int p54_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd,
 	if (modparam_nohwcrypt)
 		return -EOPNOTSUPP;
 
+	if (key->flags & IEEE80211_KEY_FLAG_RX_MGMT) {
+		/*
+		 * Unfortunately most/all firmwares are trying to decrypt
+		 * incoming management frames if a suitable key can be found.
+		 * However, in doing so the data in these frames gets
+		 * corrupted. So, we can't have firmware supported crypto
+		 * offload in this case.
+		 */
+		return -EOPNOTSUPP;
+	}
+
 	mutex_lock(&priv->conf_mutex);
 	if (cmd == SET_KEY) {
 		switch (key->cipher) {
@@ -738,6 +749,7 @@ struct ieee80211_hw *p54_init_common(size_t priv_data_len)
 		     IEEE80211_HW_SIGNAL_DBM |
 		     IEEE80211_HW_SUPPORTS_PS |
 		     IEEE80211_HW_PS_NULLFUNC_STACK |
+		     IEEE80211_HW_MFP_CAPABLE |
 		     IEEE80211_HW_REPORTS_TX_ACK_STATUS;
 
 	dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |