ath: fix WARN_ON with Polish (Poland) Contry code

This patch fixes a WARN_ON which is triggered
by Poland's country code.

ath: EEPROM regdomain: 0x8268
ath: EEPROM indicates we should expect a country code
ath: doing EEPROM country->regdmn map search
ath: country maps to regdmn code: 0x37
ath: Country alpha2 being used: PL
ath: Regpair used: 0x37
  -----------[ cut here ]------------
WARNING: at drivers/net/wireless/ath/regd.c:155 ath_regd_init+0x30b
Pid: 12661, comm: firmware/carl91 2.6.33-rc5-wl #18
Call Trace:
 [<>] ? warn_slowpath_common+0x76/0x8c
 [<>] ? ar9170_reg_notifier+0x0/0x2d [carl9170usb]
 [<>] ? ath_regd_init+0x30b/0x377 [ath]
 [<>] ? ar9170_register+0x3b3/0x3ca [carl9170usb]
[...]
---[ end trace ]---

Note: Poland is just an example. But it is very likely
that more country codes are affected.

Cc: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/net/wireless/ath/regd.c b/drivers/net/wireless/ath/regd.c
index 039ac490465c..04abd1f556b7 100644
--- a/drivers/net/wireless/ath/regd.c
+++ b/drivers/net/wireless/ath/regd.c
@@ -110,8 +110,9 @@ static const struct ieee80211_regdomain ath_world_regdom_67_68_6A = {
 
 static inline bool is_wwr_sku(u16 regd)
 {
-        return ((regd & WORLD_SKU_MASK) == WORLD_SKU_PREFIX) ||
-                (regd == WORLD);
+        return ((regd & COUNTRY_ERD_FLAG) != COUNTRY_ERD_FLAG) &&
+                (((regd & WORLD_SKU_MASK) == WORLD_SKU_PREFIX) ||
+                (regd == WORLD));
 }
 
 static u16 ath_regd_get_eepromRD(struct ath_regulatory *reg)