ath9k: merge a regulatory handling fix

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43028 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 56 insertions, 0 deletions

diff --git a/package/kernel/mac80211/patches/337-ath-use-CTL-region-from-cfg80211-if-unset-in-EEPROM.patch b/package/kernel/mac80211/patches/337-ath-use-CTL-region-from-cfg80211-if-unset-in-EEPROM.patch
new file mode 100644
index 0000000000..f451912aea
--- /dev/null
+++ b/package/kernel/mac80211/patches/337-ath-use-CTL-region-from-cfg80211-if-unset-in-EEPROM.patch
@@ -0,0 +1,56 @@
+From: Felix Fietkau <nbd@openwrt.org>
+Date: Wed, 22 Oct 2014 15:21:22 +0200
+Subject: [PATCH] ath: use CTL region from cfg80211 if unset in EEPROM
+
+Many AP devices do not have the proper regulatory domain programmed in
+EEPROM. Instead they expect the software to set the appropriate region.
+For these devices, the country code defaults to US, and the driver uses
+the US CTL tables as well.
+On devices bought in Europe this can lead to tx power being set too high
+on the band edges, even if the cfg80211 regdomain is set correctly.
+Fix this issue by taking into account the DFS region, but only when the
+EEPROM regdomain is set to default.
+
+Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+---
+
+--- a/drivers/net/wireless/ath/ath.h
++++ b/drivers/net/wireless/ath/ath.h
+@@ -80,6 +80,7 @@ struct reg_dmn_pair_mapping {
+ 
+ struct ath_regulatory {
+ 	char alpha2[2];
++	enum nl80211_dfs_regions region;
+ 	u16 country_code;
+ 	u16 max_power_level;
+ 	u16 current_rd;
+--- a/drivers/net/wireless/ath/regd.c
++++ b/drivers/net/wireless/ath/regd.c
+@@ -515,6 +515,7 @@ void ath_reg_notifier_apply(struct wiphy
+ 	if (!request)
+ 		return;
+ 
++	reg->region = request->dfs_region;
+ 	switch (request->initiator) {
+ 	case NL80211_REGDOM_SET_BY_CORE:
+ 		/*
+@@ -779,6 +780,19 @@ u32 ath_regd_get_band_ctl(struct ath_reg
+ 		return SD_NO_CTL;
+ 	}
+ 
++	if (ath_regd_get_eepromRD(reg) == CTRY_DEFAULT) {
++		switch (reg->region) {
++		case NL80211_DFS_FCC:
++			return CTL_FCC;
++		case NL80211_DFS_ETSI:
++			return CTL_ETSI;
++		case NL80211_DFS_JP:
++			return CTL_MKK;
++		default:
++			break;
++		}
++	}
++
+ 	switch (band) {
+ 	case IEEE80211_BAND_2GHZ:
+ 		return reg->regpair->reg_2ghz_ctl;