ath9k: fix a crash that happens when survey stats are accessed before the interface is brought up for the first time

SVN-Revision: 23549
2010-10-20 14:01:53 +00:00 · 2010-10-20 14:01:53 +00:00 · e53a3539e2
parent b79b929210
commit e53a3539e2
1 changed files with 12 additions and 0 deletions
--- a/package/mac80211/patches/540-ath9k_fix_survey_crash.patch
+++ b/package/mac80211/patches/540-ath9k_fix_survey_crash.patch
@ -0,0 +1,12 @@
+--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
+@@ -183,6 +183,9 @@ static void ath_update_survey_stats(stru
+ 	struct ath_cycle_counters *cc = &common->cc_survey;
+ 	unsigned int div = common->clockrate * 1000;
+ 
+	if (!ah->curchan)
+		return;
+
+ 	if (ah->power_mode == ATH9K_PM_AWAKE)
+ 		ath_hw_cycle_counters_update(common);
+