diff options
| author | Felix Fietkau <nbd@openwrt.org> | 2010-10-12 16:08:01 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2010-10-15 15:48:44 -0400 |
| commit | e49f913750bb8745085cc4c547912c330cd3eacb (patch) | |
| tree | 989230a1b47ada33ad2c0e8407456e2ec354f667 /drivers/net/wireless | |
| parent | 898c914a0871ea7e5557b77156d4358c0f15d98a (diff) | |
ath9k_hw: fix division by zero in the ANI monitor code
The commit "ath9k_hw: remove code duplication in phy error counter handling"
split off some duplicate code into a separate function, but did not have a
return code for aborting ANI processing based on counter values.
This introduced a divide by zero issue.
This patch adds the missing return code check in ath9k_hw_ani_monitor
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/ani.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/net/wireless/ath/ath9k/ani.c b/drivers/net/wireless/ath/ath9k/ani.c index 3aa8fb1ad77..9297f574b71 100644 --- a/drivers/net/wireless/ath/ath9k/ani.c +++ b/drivers/net/wireless/ath/ath9k/ani.c @@ -633,7 +633,7 @@ void ath9k_ani_reset(struct ath_hw *ah, bool is_scanning) REGWRITE_BUFFER_FLUSH(ah); } -static void ath9k_hw_ani_read_counters(struct ath_hw *ah) +static bool ath9k_hw_ani_read_counters(struct ath_hw *ah) { struct ath_common *common = ath9k_hw_common(ah); struct ar5416AniState *aniState = &ah->curchan->ani; @@ -646,10 +646,10 @@ static void ath9k_hw_ani_read_counters(struct ath_hw *ah) ath_hw_cycle_counters_update(common); listenTime = ath_hw_get_listen_time(common); - if (listenTime < 0) { + if (listenTime <= 0) { ah->stats.ast_ani_lneg++; ath9k_ani_restart(ah); - return; + return false; } if (!use_new_ani(ah)) { @@ -683,7 +683,7 @@ static void ath9k_hw_ani_read_counters(struct ath_hw *ah) REG_WRITE(ah, AR_PHY_ERR_MASK_2, AR_PHY_ERR_CCK_TIMING); } - return; + return false; } ofdmPhyErrCnt = phyCnt1 - ofdm_base; @@ -695,7 +695,7 @@ static void ath9k_hw_ani_read_counters(struct ath_hw *ah) ah->stats.ast_ani_cckerrs += cckPhyErrCnt - aniState->cckPhyErrCount; aniState->cckPhyErrCount = cckPhyErrCnt; - + return true; } void ath9k_hw_ani_monitor(struct ath_hw *ah, struct ath9k_channel *chan) @@ -711,7 +711,8 @@ void ath9k_hw_ani_monitor(struct ath_hw *ah, struct ath9k_channel *chan) if (WARN_ON(!aniState)) return; - ath9k_hw_ani_read_counters(ah); + if (!ath9k_hw_ani_read_counters(ah)) + return; ofdmPhyErrRate = aniState->ofdmPhyErrCount * 1000 / aniState->listenTime; |