From 42a49519f011d2531099fc68ce764c82c4dd84c8 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Fri, 1 Oct 2010 15:14:15 +0000
Subject: [PATCH] ath9k: fix regulatory issues with multiple cards

SVN-Revision: 23168
---
 .../520-ath9k_multiple_cards_fix.patch        | 91 +++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100644 package/mac80211/patches/520-ath9k_multiple_cards_fix.patch

diff --git a/package/mac80211/patches/520-ath9k_multiple_cards_fix.patch b/package/mac80211/patches/520-ath9k_multiple_cards_fix.patch
new file mode 100644
index 00000000000..349807b21a5
--- /dev/null
+++ b/package/mac80211/patches/520-ath9k_multiple_cards_fix.patch
@@ -0,0 +1,91 @@
+--- a/drivers/net/wireless/ath/ath9k/init.c
++++ b/drivers/net/wireless/ath/ath9k/init.c
+@@ -57,7 +57,7 @@ MODULE_PARM_DESC(blink, "Enable LED blin
+  * on 5 MHz steps, we support the channels which we know
+  * we have calibration data for all cards though to make
+  * this static */
+-static struct ieee80211_channel ath9k_2ghz_chantable[] = {
++static const struct ieee80211_channel ath9k_2ghz_chantable[] = {
+ 	CHAN2G(2412, 0), /* Channel 1 */
+ 	CHAN2G(2417, 1), /* Channel 2 */
+ 	CHAN2G(2422, 2), /* Channel 3 */
+@@ -78,7 +78,7 @@ static struct ieee80211_channel ath9k_2g
+  * on 5 MHz steps, we support the channels which we know
+  * we have calibration data for all cards though to make
+  * this static */
+-static struct ieee80211_channel ath9k_5ghz_chantable[] = {
++static const struct ieee80211_channel ath9k_5ghz_chantable[] = {
+ 	/* _We_ call this UNII 1 */
+ 	CHAN5G(5180, 14), /* Channel 36 */
+ 	CHAN5G(5200, 15), /* Channel 40 */
+@@ -478,10 +478,17 @@ err:
+ 	return -EIO;
+ }
+ 
+-static void ath9k_init_channels_rates(struct ath_softc *sc)
++static int ath9k_init_channels_rates(struct ath_softc *sc)
+ {
++	void *channels;
++
+ 	if (test_bit(ATH9K_MODE_11G, sc->sc_ah->caps.wireless_modes)) {
+-		sc->sbands[IEEE80211_BAND_2GHZ].channels = ath9k_2ghz_chantable;
++		channels = kmemdup(ath9k_2ghz_chantable,
++			sizeof(ath9k_2ghz_chantable), GFP_KERNEL);
++		if (!channels)
++		    return -ENOMEM;
++
++		sc->sbands[IEEE80211_BAND_2GHZ].channels = channels;
+ 		sc->sbands[IEEE80211_BAND_2GHZ].band = IEEE80211_BAND_2GHZ;
+ 		sc->sbands[IEEE80211_BAND_2GHZ].n_channels =
+ 			ARRAY_SIZE(ath9k_2ghz_chantable);
+@@ -491,7 +498,15 @@ static void ath9k_init_channels_rates(st
+ 	}
+ 
+ 	if (test_bit(ATH9K_MODE_11A, sc->sc_ah->caps.wireless_modes)) {
+-		sc->sbands[IEEE80211_BAND_5GHZ].channels = ath9k_5ghz_chantable;
++		channels = kmemdup(ath9k_5ghz_chantable,
++			sizeof(ath9k_5ghz_chantable), GFP_KERNEL);
++		if (!channels) {
++			if (sc->sbands[IEEE80211_BAND_2GHZ].channels)
++				kfree(sc->sbands[IEEE80211_BAND_2GHZ].channels);
++			return -ENOMEM;
++		}
++
++		sc->sbands[IEEE80211_BAND_5GHZ].channels = channels;
+ 		sc->sbands[IEEE80211_BAND_5GHZ].band = IEEE80211_BAND_5GHZ;
+ 		sc->sbands[IEEE80211_BAND_5GHZ].n_channels =
+ 			ARRAY_SIZE(ath9k_5ghz_chantable);
+@@ -500,6 +515,7 @@ static void ath9k_init_channels_rates(st
+ 		sc->sbands[IEEE80211_BAND_5GHZ].n_bitrates =
+ 			ARRAY_SIZE(ath9k_legacy_rates) - 4;
+ 	}
++	return 0;
+ }
+ 
+ static void ath9k_init_misc(struct ath_softc *sc)
+@@ -602,8 +618,11 @@ static int ath9k_init_softc(u16 devid, s
+ 	if (ret)
+ 		goto err_btcoex;
+ 
++	ret = ath9k_init_channels_rates(sc);
++	if (ret)
++		goto err_btcoex;
++
+ 	ath9k_init_crypto(sc);
+-	ath9k_init_channels_rates(sc);
+ 	ath9k_init_misc(sc);
+ 
+ 	return 0;
+@@ -784,6 +803,12 @@ static void ath9k_deinit_softc(struct at
+ {
+ 	int i = 0;
+ 
++	if (sc->sbands[IEEE80211_BAND_2GHZ].channels)
++		kfree(sc->sbands[IEEE80211_BAND_2GHZ].channels);
++
++	if (sc->sbands[IEEE80211_BAND_5GHZ].channels)
++		kfree(sc->sbands[IEEE80211_BAND_5GHZ].channels);
++
+         if ((sc->btcoex.no_stomp_timer) &&
+ 	    sc->sc_ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
+ 		ath_gen_timer_free(sc->sc_ah, sc->btcoex.no_stomp_timer);
-- 
2.30.2