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ath9k: fix rate control fallback rate selection - improves throughput and link stability

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SVN-Revision: 19716
This commit is contained in:
Felix Fietkau 2010-02-19 00:47:32 +00:00
parent b3caca3677
commit b47efaaf4d
1 changed files with 55 additions and 0 deletions
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55
package/mac80211/patches/530-ath9k_rc_fallback.patch Normal file
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@ -0,0 +1,55 @@
--- a/drivers/net/wireless/ath/ath9k/rc.c
+++ b/drivers/net/wireless/ath/ath9k/rc.c
@@ -668,7 +668,7 @@ static void ath_get_rate(void *priv, str
struct ieee80211_tx_rate *rates = tx_info->control.rates;
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
__le16 fc = hdr->frame_control;
- u8 try_per_rate, i = 0, rix, nrix;
+ u8 try_per_rate, i = 0, rix;
int is_probe = 0;
if (rate_control_send_low(sta, priv_sta, txrc))
@@ -688,26 +688,25 @@ static void ath_get_rate(void *priv, str
rate_table = sc->cur_rate_table;
rix = ath_rc_get_highest_rix(sc, ath_rc_priv, rate_table, &is_probe);
- nrix = rix;
if (is_probe) {
/* set one try for probe rates. For the
* probes don't enable rts */
ath_rc_rate_set_series(rate_table, &rates[i++], txrc,
- 1, nrix, 0);
+ 1, rix, 0);
/* Get the next tried/allowed rate. No RTS for the next series
* after the probe rate
*/
- ath_rc_get_lower_rix(rate_table, ath_rc_priv, rix, &nrix);
+ ath_rc_get_lower_rix(rate_table, ath_rc_priv, rix, &rix);
ath_rc_rate_set_series(rate_table, &rates[i++], txrc,
- try_per_rate, nrix, 0);
+ try_per_rate, rix, 0);
tx_info->flags |= IEEE80211_TX_CTL_RATE_CTRL_PROBE;
} else {
/* Set the choosen rate. No RTS for first series entry. */
ath_rc_rate_set_series(rate_table, &rates[i++], txrc,
- try_per_rate, nrix, 0);
+ try_per_rate, rix, 0);
}
/* Fill in the other rates for multirate retry */
@@ -716,10 +715,10 @@ static void ath_get_rate(void *priv, str
if (i + 1 == 4)
try_per_rate = 8;
- ath_rc_get_lower_rix(rate_table, ath_rc_priv, rix, &nrix);
+ ath_rc_get_lower_rix(rate_table, ath_rc_priv, rix, &rix);
/* All other rates in the series have RTS enabled */
ath_rc_rate_set_series(rate_table, &rates[i], txrc,
- try_per_rate, nrix, 1);
+ try_per_rate, rix, 1);
}
/*