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ath9k: fix a crash that happens when survey stats are accessed before the interface is brought up for the first time
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@23549 3c298f89-4303-0410-b956-a3cf2f4a3e73
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package/mac80211/patches/540-ath9k_fix_survey_crash.patch
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12
package/mac80211/patches/540-ath9k_fix_survey_crash.patch
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@ -0,0 +1,12 @@
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--- a/drivers/net/wireless/ath/ath9k/main.c
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+++ b/drivers/net/wireless/ath/ath9k/main.c
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@@ -183,6 +183,9 @@ static void ath_update_survey_stats(stru
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struct ath_cycle_counters *cc = &common->cc_survey;
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unsigned int div = common->clockrate * 1000;
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+ if (!ah->curchan)
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+ return;
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+
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if (ah->power_mode == ATH9K_PM_AWAKE)
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ath_hw_cycle_counters_update(common);
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