1 files changed, 17 insertions, 0 deletions

diff --git a/drivers/net/wireless/rt2x00/rt2x00ht.c b/drivers/net/wireless/rt2x00/rt2x00ht.c
index 1056c92143a8..5a407602ce3e 100644
--- a/drivers/net/wireless/rt2x00/rt2x00ht.c
+++ b/drivers/net/wireless/rt2x00/rt2x00ht.c
@@ -35,6 +35,7 @@ void rt2x00ht_create_tx_descriptor(struct queue_entry *entry,
 {
         struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb);
         struct ieee80211_tx_rate *txrate = &tx_info->control.rates[0];
+        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)entry->skb->data;
 
         if (tx_info->control.sta)
                 txdesc->mpdu_density =
@@ -66,4 +67,20 @@ void rt2x00ht_create_tx_descriptor(struct queue_entry *entry,
                 __set_bit(ENTRY_TXD_HT_BW_40, &txdesc->flags);
         if (txrate->flags & IEEE80211_TX_RC_SHORT_GI)
                 __set_bit(ENTRY_TXD_HT_SHORT_GI, &txdesc->flags);
+
+        /*
+         * Determine IFS values
+         * - Use TXOP_BACKOFF for management frames
+         * - Use TXOP_SIFS for fragment bursts
+         * - Use TXOP_HTTXOP for everything else
+         *
+         * Note: rt2800 devices won't use CTS protection (if used)
+         * for frames not transmitted with TXOP_HTTXOP
+         */
+        if (ieee80211_is_mgmt(hdr->frame_control))
+                txdesc->txop = TXOP_BACKOFF;
+        else if (!(tx_info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT))
+                txdesc->txop = TXOP_SIFS;
+        else
+                txdesc->txop = TXOP_HTTXOP;
 }