ath9k: Support RSN IBSS
Add support for using RSN IBSS with ath9k. For now, this uses software
crypto for group addressed frames in RSN IBSS, but that may be
optimized in the future by extending the key cache design to support
per-STA RX GTK.
Signed-off-by: Jouni Malinen <jouni.malinen@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c
index cdb0f1c..b590a9e 100644
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -690,6 +690,8 @@
if (AR_SREV_5416(sc->sc_ah))
hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
+ hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
+
hw->queues = 4;
hw->max_rates = 4;
hw->channel_change_time = 5000;
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index 5248257..3c5de73 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -1845,6 +1845,20 @@
if (ath9k_modparam_nohwcrypt)
return -ENOSPC;
+ if (vif->type == NL80211_IFTYPE_ADHOC &&
+ (key->cipher == WLAN_CIPHER_SUITE_TKIP ||
+ key->cipher == WLAN_CIPHER_SUITE_CCMP) &&
+ !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
+ /*
+ * For now, disable hw crypto for the RSN IBSS group keys. This
+ * could be optimized in the future to use a modified key cache
+ * design to support per-STA RX GTK, but until that gets
+ * implemented, use of software crypto for group addressed
+ * frames is a acceptable to allow RSN IBSS to be used.
+ */
+ return -EOPNOTSUPP;
+ }
+
mutex_lock(&sc->mutex);
ath9k_ps_wakeup(sc);
ath_dbg(common, ATH_DBG_CONFIG, "Set HW Key\n");