mac80211/drivers: rewrite the rate control API

So after the previous changes we were still unhappy with how
convoluted the API is and decided to make things simpler for
everybody. This completely changes the rate control API, now
taking into account 802.11n with MCS rates and more control,
most drivers don't support that though.

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

8 files changed, 117 insertions, 84 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-3945-rs.c b/drivers/net/wireless/iwlwifi/iwl-3945-rs.c
index c25daec..f440ed0 100644
--- a/drivers/net/wireless/iwlwifi/iwl-3945-rs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-3945-rs.c
@@ -422,34 +422,6 @@ static void rs_free_sta(void *priv, struct ieee80211_sta *sta,
 }
 
 
-/*
- * get ieee prev rate from rate scale table.
- * for A and B mode we need to overright prev
- * value
- */
-static int rs_adjust_next_rate(struct iwl3945_priv *priv, int rate)
-{
-	int next_rate = iwl3945_get_prev_ieee_rate(rate);
-
-	switch (priv->band) {
-	case IEEE80211_BAND_5GHZ:
-		if (rate == IWL_RATE_12M_INDEX)
-			next_rate = IWL_RATE_9M_INDEX;
-		else if (rate == IWL_RATE_6M_INDEX)
-			next_rate = IWL_RATE_6M_INDEX;
-		break;
-/* XXX cannot be invoked in current mac80211 so not a regression
-	case MODE_IEEE80211B:
-		if (rate == IWL_RATE_11M_INDEX_TABLE)
-			next_rate = IWL_RATE_5M_INDEX_TABLE;
-		break;
- */
-	default:
-		break;
-	}
-
-	return next_rate;
-}
 /**
  * rs_tx_status - Update rate control values based on Tx results
  *
@@ -460,17 +432,21 @@ static void rs_tx_status(void *priv_rate, struct ieee80211_supported_band *sband
 			 struct ieee80211_sta *sta, void *priv_sta,
 			 struct sk_buff *skb)
 {
-	u8 retries, current_count;
+	u8 retries = 0, current_count;
 	int scale_rate_index, first_index, last_index;
 	unsigned long flags;
 	struct iwl3945_priv *priv = (struct iwl3945_priv *)priv_rate;
 	struct iwl3945_rs_sta *rs_sta = priv_sta;
 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	int i;
 
 	IWL_DEBUG_RATE("enter\n");
 
-	retries = info->status.retry_count;
-	first_index = sband->bitrates[info->tx_rate_idx].hw_value;
+	for (i = 0; i < IEEE80211_TX_MAX_RATES; i++)
+		retries += info->status.rates[i].count;
+	retries--;
+
+	first_index = sband->bitrates[info->status.rates[0].idx].hw_value;
 	if ((first_index < 0) || (first_index >= IWL_RATE_COUNT)) {
 		IWL_DEBUG_RATE("leave: Rate out of bounds: %d\n", first_index);
 		return;
@@ -502,7 +478,7 @@ static void rs_tx_status(void *priv_rate, struct ieee80211_supported_band *sband
 			last_index = scale_rate_index;
 		} else {
 			current_count = priv->retry_rate;
-			last_index = rs_adjust_next_rate(priv,
+			last_index = iwl3945_rs_next_rate(priv,
 							 scale_rate_index);
 		}
 
@@ -518,7 +494,7 @@ static void rs_tx_status(void *priv_rate, struct ieee80211_supported_band *sband
 
 		if (retries)
 			scale_rate_index =
-			    rs_adjust_next_rate(priv, scale_rate_index);
+			    iwl3945_rs_next_rate(priv, scale_rate_index);
 	}
 
 
@@ -630,10 +606,11 @@ static u16 iwl3945_get_adjacent_rate(struct iwl3945_rs_sta *rs_sta,
  * rate table and must reference the driver allocated rate table
  *
  */
-static void rs_get_rate(void *priv_r, struct ieee80211_supported_band *sband,
-			struct ieee80211_sta *sta, void *priv_sta,
-			struct sk_buff *skb, struct rate_selection *sel)
+static void rs_get_rate(void *priv_r, struct ieee80211_sta *sta,
+			void *priv_sta,	struct ieee80211_tx_rate_control *txrc)
 {
+	struct ieee80211_supported_band *sband = txrc->sband;
+	struct sk_buff *skb = txrc->skb;
 	u8 low = IWL_RATE_INVALID;
 	u8 high = IWL_RATE_INVALID;
 	u16 high_low;
@@ -649,6 +626,7 @@ static void rs_get_rate(void *priv_r, struct ieee80211_supported_band *sband,
 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 	u16 fc, rate_mask;
 	struct iwl3945_priv *priv = (struct iwl3945_priv *)priv_r;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 
 	IWL_DEBUG_RATE("enter\n");
 
@@ -659,7 +637,7 @@ static void rs_get_rate(void *priv_r, struct ieee80211_supported_band *sband,
 	    is_multicast_ether_addr(hdr->addr1) ||
 	    !sta || !priv_sta) {
 		IWL_DEBUG_RATE("leave: No STA priv data to update!\n");
-		sel->rate_idx = rate_lowest_index(sband, sta);
+		info->control.rates[0].idx = rate_lowest_index(sband, sta);
 		return;
 	}
 
@@ -792,9 +770,10 @@ static void rs_get_rate(void *priv_r, struct ieee80211_supported_band *sband,
 
 	rs_sta->last_txrate_idx = index;
 	if (sband->band == IEEE80211_BAND_5GHZ)
-		sel->rate_idx = rs_sta->last_txrate_idx - IWL_FIRST_OFDM_RATE;
+		info->control.rates[0].idx = rs_sta->last_txrate_idx -
+				IWL_FIRST_OFDM_RATE;
 	else
-		sel->rate_idx = rs_sta->last_txrate_idx;
+		info->control.rates[0].idx = rs_sta->last_txrate_idx;
 
 	IWL_DEBUG_RATE("leave: %d\n", index);
 }
diff --git a/drivers/net/wireless/iwlwifi/iwl-3945.c b/drivers/net/wireless/iwlwifi/iwl-3945.c
index 8a00245..7afafb6 100644
--- a/drivers/net/wireless/iwlwifi/iwl-3945.c
+++ b/drivers/net/wireless/iwlwifi/iwl-3945.c
@@ -261,6 +261,35 @@ static inline const char *iwl3945_get_tx_fail_reason(u32 status)
 }
 #endif
 
+/*
+ * get ieee prev rate from rate scale table.
+ * for A and B mode we need to overright prev
+ * value
+ */
+int iwl3945_rs_next_rate(struct iwl3945_priv *priv, int rate)
+{
+	int next_rate = iwl3945_get_prev_ieee_rate(rate);
+
+	switch (priv->band) {
+	case IEEE80211_BAND_5GHZ:
+		if (rate == IWL_RATE_12M_INDEX)
+			next_rate = IWL_RATE_9M_INDEX;
+		else if (rate == IWL_RATE_6M_INDEX)
+			next_rate = IWL_RATE_6M_INDEX;
+		break;
+/* XXX cannot be invoked in current mac80211 so not a regression
+	case MODE_IEEE80211B:
+		if (rate == IWL_RATE_11M_INDEX_TABLE)
+			next_rate = IWL_RATE_5M_INDEX_TABLE;
+		break;
+ */
+	default:
+		break;
+	}
+
+	return next_rate;
+}
+
 
 /**
  * iwl3945_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
@@ -308,6 +337,7 @@ static void iwl3945_rx_reply_tx(struct iwl3945_priv *priv,
 	struct iwl3945_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
 	u32  status = le32_to_cpu(tx_resp->status);
 	int rate_idx;
+	int fail, i;
 
 	if ((index >= txq->q.n_bd) || (iwl3945_x2_queue_used(&txq->q, index) == 0)) {
 		IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
@@ -318,9 +348,36 @@ static void iwl3945_rx_reply_tx(struct iwl3945_priv *priv,
 	}
 
 	info = IEEE80211_SKB_CB(txq->txb[txq->q.read_ptr].skb[0]);
-	memset(&info->status, 0, sizeof(info->status));
+	ieee80211_tx_info_clear_status(info);
+
+	/* Fill the MRR chain with some info about on-chip retransmissions */
+	rate_idx = iwl3945_hwrate_to_plcp_idx(tx_resp->rate);
+	if (info->band == IEEE80211_BAND_5GHZ)
+		rate_idx -= IWL_FIRST_OFDM_RATE;
+
+	fail = tx_resp->failure_frame;
+	for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
+		int next = iwl3945_rs_next_rate(priv, rate_idx);
+
+		info->status.rates[i].idx = rate_idx;
+
+		/*
+		 * Put remaining into the last count as best approximation
+		 * of saying exactly what the hardware would have done...
+		 */
+		if ((rate_idx == next) || (i == IEEE80211_TX_MAX_RATES - 1)) {
+			info->status.rates[i].count = fail;
+			break;
+		}
+
+		info->status.rates[i].count = priv->retry_rate;
+		fail -= priv->retry_rate;
+		rate_idx = next;
+		if (fail <= 0)
+			break;
+	}
+	info->status.rates[i].count++; /* add final attempt */
 
-	info->status.retry_count = tx_resp->failure_frame;
 	/* tx_status->rts_retry_count = tx_resp->failure_rts; */
 	info->flags |= ((status & TX_STATUS_MSK) == TX_STATUS_SUCCESS) ?
 				IEEE80211_TX_STAT_ACK : 0;
@@ -329,10 +386,6 @@ static void iwl3945_rx_reply_tx(struct iwl3945_priv *priv,
 			txq_id, iwl3945_get_tx_fail_reason(status), status,
 			tx_resp->rate, tx_resp->failure_frame);
 
-	rate_idx = iwl3945_hwrate_to_plcp_idx(tx_resp->rate);
-	if (info->band == IEEE80211_BAND_5GHZ)
-		rate_idx -= IWL_FIRST_OFDM_RATE;
-	info->tx_rate_idx = rate_idx;
 	IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
 	iwl3945_tx_queue_reclaim(priv, txq_id, index);
 
diff --git a/drivers/net/wireless/iwlwifi/iwl-3945.h b/drivers/net/wireless/iwlwifi/iwl-3945.h
index bdd3247..592c595 100644
--- a/drivers/net/wireless/iwlwifi/iwl-3945.h
+++ b/drivers/net/wireless/iwlwifi/iwl-3945.h
@@ -954,6 +954,8 @@ static inline int is_channel_ibss(const struct iwl3945_channel_info *ch)
 extern const struct iwl3945_channel_info *iwl3945_get_channel_info(
 	const struct iwl3945_priv *priv, enum ieee80211_band band, u16 channel);
 
+extern int iwl3945_rs_next_rate(struct iwl3945_priv *priv, int rate);
+
 /* Requires full declaration of iwl3945_priv before including */
 #include "iwl-3945-io.h"
 
diff --git a/drivers/net/wireless/iwlwifi/iwl-4965.c b/drivers/net/wireless/iwlwifi/iwl-4965.c
index 9838de5..222c2ba 100644
--- a/drivers/net/wireless/iwlwifi/iwl-4965.c
+++ b/drivers/net/wireless/iwlwifi/iwl-4965.c
@@ -619,10 +619,10 @@ static void iwl4965_gain_computation(struct iwl_priv *priv,
 static void iwl4965_rts_tx_cmd_flag(struct ieee80211_tx_info *info,
 			__le32 *tx_flags)
 {
-	if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) {
+	if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
 		*tx_flags |= TX_CMD_FLG_RTS_MSK;
 		*tx_flags &= ~TX_CMD_FLG_CTS_MSK;
-	} else if (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT) {
+	} else if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 		*tx_flags &= ~TX_CMD_FLG_RTS_MSK;
 		*tx_flags |= TX_CMD_FLG_CTS_MSK;
 	}
@@ -2070,7 +2070,7 @@ static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
 				   agg->frame_count, agg->start_idx, idx);
 
 		info = IEEE80211_SKB_CB(priv->txq[txq_id].txb[idx].skb[0]);
-		info->status.retry_count = tx_resp->failure_frame;
+		info->status.rates[0].count = tx_resp->failure_frame + 1;
 		info->flags &= ~IEEE80211_TX_CTL_AMPDU;
 		info->flags |= iwl_is_tx_success(status)?
 			IEEE80211_TX_STAT_ACK : 0;
@@ -2227,7 +2227,7 @@ static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
 			iwl_txq_check_empty(priv, sta_id, tid, txq_id);
 		}
 	} else {
-		info->status.retry_count = tx_resp->failure_frame;
+		info->status.rates[0].count = tx_resp->failure_frame + 1;
 		info->flags |=
 			iwl_is_tx_success(status) ? IEEE80211_TX_STAT_ACK : 0;
 		iwl_hwrate_to_tx_control(priv,
diff --git a/drivers/net/wireless/iwlwifi/iwl-5000.c b/drivers/net/wireless/iwlwifi/iwl-5000.c
index 56a3f0c..d5282fa 100644
--- a/drivers/net/wireless/iwlwifi/iwl-5000.c
+++ b/drivers/net/wireless/iwlwifi/iwl-5000.c
@@ -390,8 +390,8 @@ static void iwl5000_chain_noise_reset(struct iwl_priv *priv)
 static void iwl5000_rts_tx_cmd_flag(struct ieee80211_tx_info *info,
 			__le32 *tx_flags)
 {
-	if ((info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) ||
-	    (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT))
+	if ((info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) ||
+	    (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT))
 		*tx_flags |= TX_CMD_FLG_RTS_CTS_MSK;
 	else
 		*tx_flags &= ~TX_CMD_FLG_RTS_CTS_MSK;
@@ -1154,7 +1154,7 @@ static int iwl5000_tx_status_reply_tx(struct iwl_priv *priv,
 				   agg->frame_count, agg->start_idx, idx);
 
 		info = IEEE80211_SKB_CB(priv->txq[txq_id].txb[idx].skb[0]);
-		info->status.retry_count = tx_resp->failure_frame;
+		info->status.rates[0].count = tx_resp->failure_frame + 1;
 		info->flags &= ~IEEE80211_TX_CTL_AMPDU;
 		info->flags |= iwl_is_tx_success(status)?
 			IEEE80211_TX_STAT_ACK : 0;
@@ -1307,7 +1307,7 @@ static void iwl5000_rx_reply_tx(struct iwl_priv *priv,
 			iwl_txq_check_empty(priv, sta_id, tid, txq_id);
 		}
 	} else {
-		info->status.retry_count = tx_resp->failure_frame;
+		info->status.rates[0].count = tx_resp->failure_frame + 1;
 		info->flags =
 			iwl_is_tx_success(status) ? IEEE80211_TX_STAT_ACK : 0;
 		iwl_hwrate_to_tx_control(priv,
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-rs.c b/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
index e10e0ca..f685e5d 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
@@ -798,7 +798,7 @@ static void rs_tx_status(void *priv_r, struct ieee80211_supported_band *sband,
 	    !(info->flags & IEEE80211_TX_STAT_AMPDU))
 		return;
 
-	retries = info->status.retry_count;
+	retries = info->status.rates[0].count - 1;
 
 	if (retries > 15)
 		retries = 15;
@@ -830,20 +830,15 @@ static void rs_tx_status(void *priv_r, struct ieee80211_supported_band *sband,
 	if (priv->band == IEEE80211_BAND_5GHZ)
 		rs_index -= IWL_FIRST_OFDM_RATE;
 
-	if ((info->tx_rate_idx < 0) ||
-	    (tbl_type.is_SGI ^
-		!!(info->flags & IEEE80211_TX_CTL_SHORT_GI)) ||
-	    (tbl_type.is_fat ^
-		!!(info->flags & IEEE80211_TX_CTL_40_MHZ_WIDTH)) ||
-	    (tbl_type.is_dup ^
-		!!(info->flags & IEEE80211_TX_CTL_DUP_DATA)) ||
-	    (tbl_type.ant_type ^ info->antenna_sel_tx) ||
-	    (!!(tx_rate & RATE_MCS_HT_MSK) ^
-		!!(info->flags & IEEE80211_TX_CTL_OFDM_HT)) ||
-	    (!!(tx_rate & RATE_MCS_GF_MSK) ^
-		!!(info->flags & IEEE80211_TX_CTL_GREEN_FIELD)) ||
+	if ((info->status.rates[0].idx < 0) ||
+	    (tbl_type.is_SGI != !!(info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)) ||
+	    (tbl_type.is_fat != !!(info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)) ||
+	    (tbl_type.is_dup != !!(info->status.rates[0].flags & IEEE80211_TX_RC_DUP_DATA)) ||
+	    (tbl_type.ant_type != info->antenna_sel_tx) ||
+	    (!!(tx_rate & RATE_MCS_HT_MSK) != !!(info->status.rates[0].flags & IEEE80211_TX_RC_MCS)) ||
+	    (!!(tx_rate & RATE_MCS_GF_MSK) != !!(info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD)) ||
 	    (hw->wiphy->bands[priv->band]->bitrates[rs_index].bitrate !=
-	     hw->wiphy->bands[info->band]->bitrates[info->tx_rate_idx].bitrate)) {
+	     hw->wiphy->bands[info->band]->bitrates[info->status.rates[0].idx].bitrate)) {
 		IWL_DEBUG_RATE("initial rate does not match 0x%x\n", tx_rate);
 		goto out;
 	}
@@ -2098,15 +2093,17 @@ static void rs_initialize_lq(struct iwl_priv *priv,
 	return;
 }
 
-static void rs_get_rate(void *priv_r, struct ieee80211_supported_band *sband,
-			struct ieee80211_sta *sta, void *priv_sta,
-			struct sk_buff *skb, struct rate_selection *sel)
+static void rs_get_rate(void *priv_r, struct ieee80211_sta *sta, void *priv_sta,
+			struct ieee80211_tx_rate_control *txrc)
 {
 
 	int i;
+	struct sk_buff *skb = txrc->skb;
+	struct ieee80211_supported_band *sband = txrc->sband;
 	struct iwl_priv *priv = (struct iwl_priv *)priv_r;
 	struct ieee80211_conf *conf = &priv->hw->conf;
 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 	__le16 fc;
 	struct iwl_lq_sta *lq_sta;
 
@@ -2117,7 +2114,7 @@ static void rs_get_rate(void *priv_r, struct ieee80211_supported_band *sband,
 	fc = hdr->frame_control;
 	if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1) ||
 	    !sta || !priv_sta) {
-		sel->rate_idx = rate_lowest_index(sband, sta);
+		info->control.rates[0].idx = rate_lowest_index(sband, sta);
 		return;
 	}
 
@@ -2143,13 +2140,13 @@ static void rs_get_rate(void *priv_r, struct ieee80211_supported_band *sband,
 	}
 
 	if ((i < 0) || (i > IWL_RATE_COUNT)) {
-		sel->rate_idx = rate_lowest_index(sband, sta);
+		info->control.rates[0].idx = rate_lowest_index(sband, sta);
 		return;
 	}
 
 	if (sband->band == IEEE80211_BAND_5GHZ)
 		i -= IWL_FIRST_OFDM_RATE;
-	sel->rate_idx = i;
+	info->control.rates[0].idx = i;
 }
 
 static void *rs_alloc_sta(void *priv_rate, struct ieee80211_sta *sta,
diff --git a/drivers/net/wireless/iwlwifi/iwl-core.c b/drivers/net/wireless/iwlwifi/iwl-core.c
index 10f5a0a..2c4162e 100644
--- a/drivers/net/wireless/iwlwifi/iwl-core.c
+++ b/drivers/net/wireless/iwlwifi/iwl-core.c
@@ -88,26 +88,27 @@ EXPORT_SYMBOL(iwl_rates);
  * translate ucode response to mac80211 tx status control values
  */
 void iwl_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
-				  struct ieee80211_tx_info *control)
+				  struct ieee80211_tx_info *info)
 {
 	int rate_index;
+	struct ieee80211_tx_rate *r = &info->control.rates[0];
 
-	control->antenna_sel_tx =
+	info->antenna_sel_tx =
 		((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
 	if (rate_n_flags & RATE_MCS_HT_MSK)
-		control->flags |= IEEE80211_TX_CTL_OFDM_HT;
+		r->flags |= IEEE80211_TX_RC_MCS;
 	if (rate_n_flags & RATE_MCS_GF_MSK)
-		control->flags |= IEEE80211_TX_CTL_GREEN_FIELD;
+		r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
 	if (rate_n_flags & RATE_MCS_FAT_MSK)
-		control->flags |= IEEE80211_TX_CTL_40_MHZ_WIDTH;
+		r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
 	if (rate_n_flags & RATE_MCS_DUP_MSK)
-		control->flags |= IEEE80211_TX_CTL_DUP_DATA;
+		r->flags |= IEEE80211_TX_RC_DUP_DATA;
 	if (rate_n_flags & RATE_MCS_SGI_MSK)
-		control->flags |= IEEE80211_TX_CTL_SHORT_GI;
+		r->flags |= IEEE80211_TX_RC_SHORT_GI;
 	rate_index = iwl_hwrate_to_plcp_idx(rate_n_flags);
-	if (control->band == IEEE80211_BAND_5GHZ)
+	if (info->band == IEEE80211_BAND_5GHZ)
 		rate_index -= IWL_FIRST_OFDM_RATE;
-	control->tx_rate_idx = rate_index;
+	r->idx = rate_index;
 }
 EXPORT_SYMBOL(iwl_hwrate_to_tx_control);
 
diff --git a/drivers/net/wireless/iwlwifi/iwl3945-base.c b/drivers/net/wireless/iwlwifi/iwl3945-base.c
index b1464c7..2cd33b4 100644
--- a/drivers/net/wireless/iwlwifi/iwl3945-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl3945-base.c
@@ -2395,6 +2395,7 @@ static void iwl3945_build_tx_cmd_basic(struct iwl3945_priv *priv,
 {
 	__le16 fc = hdr->frame_control;
 	__le32 tx_flags = cmd->cmd.tx.tx_flags;
+	u8 rc_flags = info->control.rates[0].flags;
 
 	cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 	if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
@@ -2421,10 +2422,10 @@ static void iwl3945_build_tx_cmd_basic(struct iwl3945_priv *priv,
 		tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 	}
 
-	if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) {
+	if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
 		tx_flags |= TX_CMD_FLG_RTS_MSK;
 		tx_flags &= ~TX_CMD_FLG_CTS_MSK;
-	} else if (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT) {
+	} else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 		tx_flags &= ~TX_CMD_FLG_RTS_MSK;
 		tx_flags |= TX_CMD_FLG_CTS_MSK;
 	}