ath9k: use cold reset instead of warm reset on ar9280 to make recovery from...

ath9k: use cold reset instead of warm reset on ar9280 to make recovery from stuck states more reliable

SVN-Revision: 28118

package/mac80211/patches/593-ath9k_ar9280_cold_reset.patch

+--- a/drivers/net/wireless/ath/ath9k/hw.c
++++ b/drivers/net/wireless/ath/ath9k/hw.c
+@@ -1368,10 +1368,16 @@ static bool ath9k_hw_set_reset_reg(struc
+ static bool ath9k_hw_chip_reset(struct ath_hw *ah,
+ 				struct ath9k_channel *chan)
+ {
+-	if (AR_SREV_9280(ah) && ah->eep_ops->get_eeprom(ah, EEP_OL_PWRCTRL)) {
+-		if (!ath9k_hw_set_reset_reg(ah, ATH9K_RESET_POWER_ON))
+-			return false;
+-	} else if (!ath9k_hw_set_reset_reg(ah, ATH9K_RESET_WARM))
++	int reset_type = ATH9K_RESET_WARM;
++
++	if (AR_SREV_9280(ah)) {
++		if (ah->eep_ops->get_eeprom(ah, EEP_OL_PWRCTRL))
++			reset_type = ATH9K_RESET_POWER_ON;
++		else
++			reset_type = ATH9K_RESET_COLD;
++	}
++
++	if (!ath9k_hw_set_reset_reg(ah, reset_type))
+ 		return false;
+ 
+ 	if (!ath9k_hw_setpower(ah, ATH9K_PM_AWAKE))