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rt2x00: Move iv_len into tx descriptor data

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By placing the iv_len into the tx descriptor data and
by passing this data to the crypto IV handlers we can
save multiple calls to ieee80211_get_hdrlen_from_skb()
and some if-statements when copying/removing the IV data
from the outgoing frame.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Ivo van Doorn
2009-04-26 16:08:30 +02:00
committed by John W. Linville
parent bbb33881ae
commit 9eb4e21e28
4 changed files with 19 additions and 20 deletions
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8
drivers/net/wireless/rt2x00/rt2x00queue.c
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@@ -368,7 +368,6 @@ int rt2x00queue_write_tx_frame(struct data_queue *queue, struct sk_buff *skb)
struct queue_entry *entry = rt2x00queue_get_entry(queue, Q_INDEX);
struct txentry_desc txdesc;
struct skb_frame_desc *skbdesc;
unsigned int iv_len = 0;
u8 rate_idx, rate_flags;
if (unlikely(rt2x00queue_full(queue)))
@@ -390,9 +389,6 @@ int rt2x00queue_write_tx_frame(struct data_queue *queue, struct sk_buff *skb)
entry->skb = skb;
rt2x00queue_create_tx_descriptor(entry, &txdesc);
if (IEEE80211_SKB_CB(skb)->control.hw_key != NULL)
iv_len = IEEE80211_SKB_CB(skb)->control.hw_key->iv_len;
/*
* All information is retrieved from the skb->cb array,
* now we should claim ownership of the driver part of that
@@ -415,9 +411,9 @@ int rt2x00queue_write_tx_frame(struct data_queue *queue, struct sk_buff *skb)
if (test_bit(ENTRY_TXD_ENCRYPT, &txdesc.flags) &&
!test_bit(ENTRY_TXD_ENCRYPT_IV, &txdesc.flags)) {
if (test_bit(DRIVER_REQUIRE_COPY_IV, &queue->rt2x00dev->flags))
rt2x00crypto_tx_copy_iv(skb, iv_len);
rt2x00crypto_tx_copy_iv(skb, &txdesc);
else
rt2x00crypto_tx_remove_iv(skb, iv_len);
rt2x00crypto_tx_remove_iv(skb, &txdesc);
}
/*