From: Felix Fietkau <nbd@openwrt.org>
Date: Fri, 15 Jan 2010 07:39:35 +0000 (+0000)
Subject: ath9k: fix rts/cts handling
X-Git-Url: http://git.openwrt.org/?p=openwrt%2Fsvn-archive%2Farchive.git;a=commitdiff_plain;hb=d0cec4f1eea70d1b4b1af9ff0429772825130e52

ath9k: fix rts/cts handling

SVN-Revision: 19147
---

diff --git a/package/mac80211/patches/570-ath9k_fix_rts_cts.patch b/package/mac80211/patches/570-ath9k_fix_rts_cts.patch
new file mode 100644
index 0000000000..789623c674
--- /dev/null
+++ b/package/mac80211/patches/570-ath9k_fix_rts_cts.patch
@@ -0,0 +1,61 @@
+--- a/drivers/net/wireless/ath/ath9k/xmit.c
++++ b/drivers/net/wireless/ath/ath9k/xmit.c
+@@ -1498,26 +1498,6 @@ static void ath_buf_set_rate(struct ath_
+ 	if (sc->sc_flags & SC_OP_PREAMBLE_SHORT)
+ 		ctsrate |= rate->hw_value_short;
+ 
+-	/*
+-	 * ATH9K_TXDESC_RTSENA and ATH9K_TXDESC_CTSENA are mutually exclusive.
+-	 * Check the first rate in the series to decide whether RTS/CTS
+-	 * or CTS-to-self has to be used.
+-	 */
+-	if (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
+-		flags = ATH9K_TXDESC_CTSENA;
+-	else if (rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
+-		flags = ATH9K_TXDESC_RTSENA;
+-
+-	/* FIXME: Handle aggregation protection */
+-	if (sc->config.ath_aggr_prot &&
+-	    (!bf_isaggr(bf) || (bf_isaggr(bf) && bf->bf_al < 8192))) {
+-		flags = ATH9K_TXDESC_RTSENA;
+-	}
+-
+-	/* For AR5416 - RTS cannot be followed by a frame larger than 8K */
+-	if (bf_isaggr(bf) && (bf->bf_al > sc->sc_ah->caps.rts_aggr_limit))
+-		flags &= ~(ATH9K_TXDESC_RTSENA);
+-
+ 	for (i = 0; i < 4; i++) {
+ 		bool is_40, is_sgi, is_sp;
+ 		int phy;
+@@ -1529,8 +1509,15 @@ static void ath_buf_set_rate(struct ath_
+ 		series[i].Tries = rates[i].count;
+ 		series[i].ChSel = common->tx_chainmask;
+ 
+-		if (rates[i].flags & IEEE80211_TX_RC_USE_RTS_CTS)
++		if ((sc->config.ath_aggr_prot && bf_isaggr(bf)) ||
++		    (rates[i].flags & IEEE80211_TX_RC_USE_RTS_CTS)) {
+ 			series[i].RateFlags |= ATH9K_RATESERIES_RTS_CTS;
++			flags |= ATH9K_TXDESC_RTSENA;
++		} else if (rates[i].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
++			series[i].RateFlags |= ATH9K_RATESERIES_RTS_CTS;
++			flags |= ATH9K_TXDESC_CTSENA;
++		}
++
+ 		if (rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
+ 			series[i].RateFlags |= ATH9K_RATESERIES_2040;
+ 		if (rates[i].flags & IEEE80211_TX_RC_SHORT_GI)
+@@ -1568,6 +1555,14 @@ static void ath_buf_set_rate(struct ath_
+ 			phy, rate->bitrate * 100, bf->bf_frmlen, rix, is_sp);
+ 	}
+ 
++	/* For AR5416 - RTS cannot be followed by a frame larger than 8K */
++	if (bf_isaggr(bf) && (bf->bf_al > sc->sc_ah->caps.rts_aggr_limit))
++		flags &= ~ATH9K_TXDESC_RTSENA;
++
++	/* ATH9K_TXDESC_RTSENA and ATH9K_TXDESC_CTSENA are mutually exclusive. */
++	if (flags & ATH9K_TXDESC_RTSENA)
++		flags &= ~ATH9K_TXDESC_CTSENA;
++
+ 	/* set dur_update_en for l-sig computation except for PS-Poll frames */
+ 	ath9k_hw_set11n_ratescenario(sc->sc_ah, bf->bf_desc,
+ 				     bf->bf_lastbf->bf_desc,