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ath9k: fix crash in ath_update_survey_stats

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If ah->curchan is uninitialized, the channel index is bogus, which leads
to invalid memory access when the cycle counters are updated.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Felix Fietkau 2010-10-20 15:59:28 +02:00 • committed by John W. Linville
parent 2d3fca1807
commit 0845735e2d
1 changed files with 3 additions and 0 deletions
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3
drivers/net/wireless/ath/ath9k/main.c
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@ -182,6 +182,9 @@ static void ath_update_survey_stats(struct ath_softc *sc)
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);