mac80211: use rate index in TX control

This patch modifies struct ieee80211_tx_control to give band
info and the rate index (instead of rate pointers) to drivers.
This mostly serves to reduce the TX control structure size to
make it fit into skb->cb so that the fragmentation code can
put it there and we can think about passing it to drivers that
way in the future.

The rt2x00 driver update was done by Ivo, thanks.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 7 insertions, 5 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-4965-rs.c b/drivers/net/wireless/iwlwifi/iwl-4965-rs.c
index 2adc2281c77c..7993a1d83025 100644
--- a/drivers/net/wireless/iwlwifi/iwl-4965-rs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-4965-rs.c
@@ -862,7 +862,7 @@ static void rs_tx_status(void *priv_rate, struct net_device *dev,
         if (priv->band == IEEE80211_BAND_5GHZ)
                 rs_index -= IWL_FIRST_OFDM_RATE;
 
-        if ((tx_resp->control.tx_rate == NULL) ||
+        if ((tx_resp->control.tx_rate_idx < 0) ||
             (tbl_type.is_SGI ^
                 !!(tx_resp->control.flags & IEEE80211_TXCTL_SHORT_GI)) ||
             (tbl_type.is_fat ^
@@ -875,7 +875,7 @@ static void rs_tx_status(void *priv_rate, struct net_device *dev,
             (!!(tx_rate & RATE_MCS_GF_MSK) ^
                 !!(tx_resp->control.flags & IEEE80211_TXCTL_GREEN_FIELD)) ||
             (hw->wiphy->bands[priv->band]->bitrates[rs_index].bitrate !=
-                tx_resp->control.tx_rate->bitrate)) {
+             hw->wiphy->bands[tx_resp->control.band]->bitrates[tx_resp->control.tx_rate_idx].bitrate)) {
                 IWL_DEBUG_RATE("initial rate does not match 0x%x\n", tx_rate);
                 goto out;
         }
@@ -2154,7 +2154,7 @@ static void rs_get_rate(void *priv_rate, struct net_device *dev,
         fc = le16_to_cpu(hdr->frame_control);
         if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1) ||
             !sta || !sta->rate_ctrl_priv) {
-                sel->rate = rate_lowest(local, sband, sta);
+                sel->rate_idx = rate_lowest_index(local, sband, sta);
                 goto out;
         }
 
@@ -2184,11 +2184,13 @@ static void rs_get_rate(void *priv_rate, struct net_device *dev,
 
 done:
         if ((i < 0) || (i > IWL_RATE_COUNT)) {
-                sel->rate = rate_lowest(local, sband, sta);
+                sel->rate_idx = rate_lowest_index(local, sband, sta);
                 goto out;
         }
 
-        sel->rate = &priv->ieee_rates[i];
+        if (sband->band == IEEE80211_BAND_5GHZ)
+                i -= IWL_FIRST_OFDM_RATE;
+        sel->rate_idx = i;
 out:
         rcu_read_unlock();
 }