ath9k: assign keycache slots to unencrypted stations

Frame filtering relies on having a valid destination index (keycache slot),
to keep track of the destination. Assigning a keycache slot (configured
to unencrypted, with no key data attached) improves powersave handling in
AP mode with no encryption.
The dummy keycache entry for a station is cleared, when a real key gets
added.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/net/wireless/ath/key.c b/drivers/net/wireless/ath/key.c
index 0d4f39cbdcab..a61ef3d6d89c 100644
--- a/drivers/net/wireless/ath/key.c
+++ b/drivers/net/wireless/ath/key.c
@@ -483,6 +483,9 @@ int ath_key_config(struct ath_common *common,
         memset(&hk, 0, sizeof(hk));
 
         switch (key->cipher) {
+        case 0:
+                hk.kv_type = ATH_CIPHER_CLR;
+                break;
         case WLAN_CIPHER_SUITE_WEP40:
         case WLAN_CIPHER_SUITE_WEP104:
                 hk.kv_type = ATH_CIPHER_WEP;
@@ -498,7 +501,8 @@ int ath_key_config(struct ath_common *common,
         }
 
         hk.kv_len = key->keylen;
-        memcpy(hk.kv_val, key->key, key->keylen);
+        if (key->keylen)
+                memcpy(hk.kv_val, key->key, key->keylen);
 
         if (!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
                 switch (vif->type) {