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From 4f9ea5700c714afce77e410d1c0c114c42d5a910 Mon Sep 17 00:00:00 2001
From: Ivo van Doorn <IvDoorn@gmail.com>
Date: Sun, 18 Jan 2009 20:17:10 +0100
Subject: [PATCH] rt2x00: Fix TX rate short preamble detection
Mac80211 provides 2 structures to handle bitrates, namely
ieee80211_rate and ieee80211_tx_rate. To determine the short preamble
mode for an outgoing frame, the flag IEEE80211_TX_RC_USE_SHORT_PREAMBLE
must be checked on ieee80211_tx_rate and not ieee80211_rate (which rt2x00 did).
This fixes a regression which was triggered in 2.6.29-rcX as reported by Chris Clayton.
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
---
drivers/net/wireless/rt2x00/rt2x00queue.c | 9 +++++----
1 files changed, 5 insertions(+), 4 deletions(-)
--- a/drivers/net/wireless/rt2x00/rt2x00queue.c
+++ b/drivers/net/wireless/rt2x00/rt2x00queue.c
@@ -186,10 +186,11 @@ static void rt2x00queue_create_tx_descri
static void rt2x00queue_create_tx_descriptor_plcp(struct queue_entry *entry,
struct txentry_desc *txdesc,
- struct ieee80211_rate *rate)
+ const struct rt2x00_rate *hwrate)
{
struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
- const struct rt2x00_rate *hwrate = rt2x00_get_rate(rate->hw_value);
+ struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb);
+ struct ieee80211_tx_rate *txrate = &tx_info->control.rates[0];
unsigned int data_length;
unsigned int duration;
unsigned int residual;
@@ -232,7 +233,7 @@ static void rt2x00queue_create_tx_descri
* When preamble is enabled we should set the
* preamble bit for the signal.
*/
- if (rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
+ if (txrate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
txdesc->signal |= 0x08;
}
}
@@ -327,7 +328,7 @@ static void rt2x00queue_create_tx_descri
rt2x00crypto_create_tx_descriptor(entry, txdesc);
rt2x00ht_create_tx_descriptor(entry, txdesc, rate);
rt2x00queue_create_tx_descriptor_seq(entry, txdesc);
- rt2x00queue_create_tx_descriptor_plcp(entry, txdesc, rate);
+ rt2x00queue_create_tx_descriptor_plcp(entry, txdesc, hwrate);
}
static void rt2x00queue_write_tx_descriptor(struct queue_entry *entry,
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