mac80211: free up 2 bytes in skb->cb

Free up 2 bytes in skb->cb to be used for multi-rate retry later.
Move iv_len and icv_len initialization into key alloc.

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

3 files changed, 14 insertions, 9 deletions

diff --git a/net/mac80211/key.c b/net/mac80211/key.c
index 57afcd38cd9e..a5b06fe71980 100644
--- a/net/mac80211/key.c
+++ b/net/mac80211/key.c
@@ -281,6 +281,20 @@ struct ieee80211_key *ieee80211_key_alloc(enum ieee80211_key_alg alg,
         key->conf.alg = alg;
         key->conf.keyidx = idx;
         key->conf.keylen = key_len;
+        switch (alg) {
+        case ALG_WEP:
+                key->conf.iv_len = WEP_IV_LEN;
+                key->conf.icv_len = WEP_ICV_LEN;
+                break;
+        case ALG_TKIP:
+                key->conf.iv_len = TKIP_IV_LEN;
+                key->conf.icv_len = TKIP_ICV_LEN;
+                break;
+        case ALG_CCMP:
+                key->conf.iv_len = CCMP_HDR_LEN;
+                key->conf.icv_len = CCMP_MIC_LEN;
+                break;
+        }
         memcpy(key->conf.key, key_data, key_len);
         INIT_LIST_HEAD(&key->list);
         INIT_LIST_HEAD(&key->todo);
diff --git a/net/mac80211/wep.c b/net/mac80211/wep.c
index 376c84987e4f..f0e2d3ecb5c4 100644
--- a/net/mac80211/wep.c
+++ b/net/mac80211/wep.c
@@ -313,9 +313,6 @@ static int wep_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
 {
         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 
-        info->control.iv_len = WEP_IV_LEN;
-        info->control.icv_len = WEP_ICV_LEN;
-
         if (!(tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) {
                 if (ieee80211_wep_encrypt(tx->local, skb, tx->key))
                         return -1;
diff --git a/net/mac80211/wpa.c b/net/mac80211/wpa.c
index 37ae9a959f63..6db649480e8f 100644
--- a/net/mac80211/wpa.c
+++ b/net/mac80211/wpa.c
@@ -152,9 +152,6 @@ static int tkip_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
         int len, tail;
         u8 *pos;
 
-        info->control.icv_len = TKIP_ICV_LEN;
-        info->control.iv_len = TKIP_IV_LEN;
-
         if ((tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) &&
             !(tx->key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)) {
                 /* hwaccel - with no need for preallocated room for IV/ICV */
@@ -374,9 +371,6 @@ static int ccmp_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
         u8 *pos, *pn;
         int i;
 
-        info->control.icv_len = CCMP_MIC_LEN;
-        info->control.iv_len = CCMP_HDR_LEN;
-
         if ((tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) &&
             !(tx->key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)) {
                 /* hwaccel - with no need for preallocated room for CCMP "