From cb17bac6f8d3eb4725b903b53d27fec58145392b Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Wed, 20 Feb 2008 21:26:29 +0000
Subject: [PATCH] improve reliability of beacon transmissions after channel
 change

SVN-Revision: 10512
---
 .../madwifi/patches/332-reset_beacons.patch   | 68 +++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 package/madwifi/patches/332-reset_beacons.patch

diff --git a/package/madwifi/patches/332-reset_beacons.patch b/package/madwifi/patches/332-reset_beacons.patch
new file mode 100644
index 0000000000..e34746ee6a
--- /dev/null
+++ b/package/madwifi/patches/332-reset_beacons.patch
@@ -0,0 +1,68 @@
+Index: madwifi-trunk-r3314/ath/if_ath.c
+===================================================================
+--- madwifi-trunk-r3314.orig/ath/if_ath.c	2008-02-20 22:22:50.203268987 +0100
++++ madwifi-trunk-r3314/ath/if_ath.c	2008-02-20 22:23:25.745294410 +0100
+@@ -1592,6 +1592,16 @@
+ 	ath_init(dev);
+ }
+ 
++static HAL_BOOL ath_hw_reset(struct ath_hal *ah, HAL_OPMODE opmode,
++				     HAL_CHANNEL *channel, HAL_BOOL bChannelChange,
++				     HAL_STATUS *status)
++{
++	HAL_BOOL ret;
++	ret = ath_hal_reset(ah, opmode, channel, bChannelChange, status);
++	mdelay(5); /* extra delay to allow the hw to settle in */
++	return ret;
++}
++
+ /* Channel Availability Check is running, or a channel has already found to be 
+  * unavailable. */
+ static int
+@@ -2474,7 +2484,7 @@
+ 	 */
+ 	sc->sc_curchan.channel = ic->ic_curchan->ic_freq;
+ 	sc->sc_curchan.channelFlags = ath_chan2flags(ic->ic_curchan);
+-	if (!ath_hal_reset(ah, sc->sc_opmode, &sc->sc_curchan, AH_FALSE, &status)) {
++	if (!ath_hw_reset(ah, sc->sc_opmode, &sc->sc_curchan, AH_FALSE, &status)) {
+ 		EPRINTF(sc, "unable to reset hardware: '%s' (HAL status %u) "
+ 			"(freq %u flags 0x%x)\n", 
+ 			ath_get_hal_status_desc(status), status,
+@@ -2773,7 +2783,7 @@
+ 	ath_draintxq(sc);		/* stop xmit side */
+ 	ath_stoprecv(sc);		/* stop recv side */
+ 	/* NB: indicate channel change so we do a full reset */
+-	if (!ath_hal_reset(ah, sc->sc_opmode, &sc->sc_curchan, AH_TRUE, &status))
++	if (!ath_hw_reset(ah, sc->sc_opmode, &sc->sc_curchan, AH_TRUE, &status))
+ 		EPRINTF(sc, "Unable to reset hardware: '%s' (HAL status %u)\n",
+ 			ath_get_hal_status_desc(status), status);
+ 
+@@ -8848,8 +8858,8 @@
+ 		 * needed to do the reset with chanchange = AH_FALSE in order
+ 		 * to receive traffic when peforming high velocity channel
+ 		 * changes. */
+-		if (!ath_hal_reset(ah, sc->sc_opmode, &hchan, AH_TRUE, &status)   ||
+-		    !ath_hal_reset(ah, sc->sc_opmode, &hchan, AH_FALSE, &status)) {
++		if (!ath_hw_reset(ah, sc->sc_opmode, &hchan, AH_TRUE, &status)   ||
++		    !ath_hw_reset(ah, sc->sc_opmode, &hchan, AH_FALSE, &status)) {
+ 			EPRINTF(sc, "Unable to reset channel %u (%u MHz) "
+ 				"flags 0x%x '%s' (HAL status %u)\n",
+ 				ieee80211_chan2ieee(ic, chan), chan->ic_freq,
+@@ -8905,7 +8915,7 @@
+ 		 * re configure beacons when it is a turbo mode switch.
+ 		 * HW seems to turn off beacons during turbo mode switch.
+ 		 */
+-		if (sc->sc_beacons && tswitch && !sc->sc_dfs_cac)
++		if (sc->sc_beacons && !sc->sc_dfs_cac)
+ 			ath_beacon_config(sc, NULL);
+ 		/*
+ 		 * Re-enable interrupts.
+@@ -11455,7 +11465,7 @@
+ 		ieee80211_cancel_scan(vap);	/* anything current */
+ 		ieee80211_wme_updateparams(vap);
+ 		/*  reset the WNIC */
+-		if (!ath_hal_reset(ah, sc->sc_opmode, 
++		if (!ath_hw_reset(ah, sc->sc_opmode,
+ 					&sc->sc_curchan, AH_TRUE, &status)) {
+ 			EPRINTF(sc, "ath_hal_reset failed: '%s' "
+ 					"(HAL status %u).\n",
-- 
2.25.1