ath: do not apply broken power limits with ATH_USER_REGD

If a device uses the default EEPROM code, typically only the main CTLs
are valid, and they do not apply properly when switching to a different
regulatory domain. If the regdomain deviates from the EEPROM one, force
the world roaming regdomain to ensure that power limits are sane

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

1 files changed, 38 insertions, 6 deletions

diff --git a/package/kernel/mac80211/patches/402-ath_regd_optional.patch b/package/kernel/mac80211/patches/402-ath_regd_optional.patch
index 0d6d3dbdbd..c8ede7f583 100644
--- a/package/kernel/mac80211/patches/402-ath_regd_optional.patch
+++ b/package/kernel/mac80211/patches/402-ath_regd_optional.patch
@@ -1,6 +1,14 @@
 --- a/drivers/net/wireless/ath/regd.c
 +++ b/drivers/net/wireless/ath/regd.c
-@@ -116,6 +116,9 @@ static const struct ieee80211_regdomain
+@@ -24,6 +24,7 @@
+ #include "regd_common.h"
+ 
+ static int __ath_regd_init(struct ath_regulatory *reg);
++static struct reg_dmn_pair_mapping *ath_get_regpair(int regdmn);
+ 
+ /*
+  * This is a set of common rules used by our world regulatory domains.
+@@ -116,6 +117,9 @@ static const struct ieee80211_regdomain
  
  static bool dynamic_country_user_possible(struct ath_regulatory *reg)
  {
@@ -10,7 +18,7 @@
  	if (IS_ENABLED(CPTCFG_ATH_REG_DYNAMIC_USER_CERT_TESTING))
  		return true;
  
-@@ -188,6 +191,8 @@ static bool dynamic_country_user_possibl
+@@ -188,6 +192,8 @@ static bool dynamic_country_user_possibl
  
  static bool ath_reg_dyn_country_user_allow(struct ath_regulatory *reg)
  {
@@ -19,7 +27,7 @@
  	if (!IS_ENABLED(CPTCFG_ATH_REG_DYNAMIC_USER_REG_HINTS))
  		return false;
  	if (!dynamic_country_user_possible(reg))
-@@ -341,6 +346,9 @@ ath_reg_apply_beaconing_flags(struct wip
+@@ -341,6 +347,9 @@ ath_reg_apply_beaconing_flags(struct wip
  	struct ieee80211_channel *ch;
  	unsigned int i;
  
@@ -29,7 +37,7 @@
  	for (band = 0; band < NUM_NL80211_BANDS; band++) {
  		if (!wiphy->bands[band])
  			continue;
-@@ -374,6 +382,9 @@ ath_reg_apply_ir_flags(struct wiphy *wip
+@@ -374,6 +383,9 @@ ath_reg_apply_ir_flags(struct wiphy *wip
  {
  	struct ieee80211_supported_band *sband;
  
@@ -39,7 +47,7 @@
  	sband = wiphy->bands[NL80211_BAND_2GHZ];
  	if (!sband)
  		return;
-@@ -402,6 +413,9 @@ static void ath_reg_apply_radar_flags(st
+@@ -402,6 +414,9 @@ static void ath_reg_apply_radar_flags(st
  	struct ieee80211_channel *ch;
  	unsigned int i;
  
@@ -49,7 +57,19 @@
  	if (!wiphy->bands[NL80211_BAND_5GHZ])
  		return;
  
-@@ -634,6 +648,10 @@ ath_regd_init_wiphy(struct ath_regulator
+@@ -539,6 +554,11 @@ void ath_reg_notifier_apply(struct wiphy
+ 		ath_reg_dyn_country(wiphy, reg, request);
+ 		break;
+ 	}
++
++	/* Prevent broken CTLs from being applied */
++	if (IS_ENABLED(CPTCFG_ATH_USER_REGD) &&
++	    reg->regpair != common->reg_world_copy.regpair)
++		reg->regpair = ath_get_regpair(WOR0_WORLD);
+ }
+ EXPORT_SYMBOL(ath_reg_notifier_apply);
+ 
+@@ -634,6 +654,10 @@ ath_regd_init_wiphy(struct ath_regulator
  	const struct ieee80211_regdomain *regd;
  
  	wiphy->reg_notifier = reg_notifier;
@@ -60,6 +80,18 @@
  	wiphy->regulatory_flags |= REGULATORY_STRICT_REG |
  				   REGULATORY_CUSTOM_REG;
  
+@@ -762,10 +786,7 @@ ath_regd_init(struct ath_regulatory *reg
+ 	if (r)
+ 		return r;
+ 
+-	if (ath_is_world_regd(reg))
+-		memcpy(&common->reg_world_copy, reg,
+-		       sizeof(struct ath_regulatory));
+-
++	memcpy(&common->reg_world_copy, reg, sizeof(struct ath_regulatory));
+ 	ath_regd_init_wiphy(reg, wiphy, reg_notifier);
+ 
+ 	return 0;
 --- a/drivers/net/wireless/ath/Kconfig
 +++ b/drivers/net/wireless/ath/Kconfig
 @@ -23,6 +23,9 @@ config WLAN_VENDOR_ATH