On 04/22/2014 10:53 AM, John W. Linville wrote:
> Please consider Felix's comments while refactoring this for the
> current code structure...
I'm low on time, but will resend a patch when I get a chance.
If someone else wants to send in the updated patch that is fine by me.
Thanks,
Ben
>
> John
>
> On Thu, Apr 17, 2014 at 09:47:26AM +0200, Felix Fietkau wrote:
>> On 2014-04-17 02:40, gree...@candelatech.com wrote:
>>> From: Ben Greear <gree...@candelatech.com>
>>>
>>> Make sure we cannot ever assign beacon interval to zero.
>>>
>>> Signed-off-by: Ben Greear <gree...@candelatech.com>
>>> ---
>>> drivers/net/wireless/ath/ath9k/beacon.c | 4 ++++
>>> drivers/net/wireless/ath/ath9k/recv.c | 3 ++-
>>> 2 files changed, 6 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/drivers/net/wireless/ath/ath9k/beacon.c
>>> b/drivers/net/wireless/ath/ath9k/beacon.c
>>> index 2e8bba0..5391f01 100644
>>> --- a/drivers/net/wireless/ath/ath9k/beacon.c
>>> +++ b/drivers/net/wireless/ath/ath9k/beacon.c
>>> @@ -443,6 +443,8 @@ static u32 ath9k_mod_tsf64_tu(u64 tsf, u32 div_tu)
>>> {
>>> u32 tsf_mod, tsf_hi, tsf_lo, mod_hi, mod_lo;
>>>
>>> + if (WARN_ON_ONCE(div_tu == 0))
>>> + div_tu = 100;
>>> tsf_mod = tsf & (BIT(10) - 1);
>>> tsf_hi = tsf >> 32;
>>> tsf_lo = ((u32) tsf) >> 10;
>> Why add this warning here if you already have the additions below? We
>> don't need multiple layers of defensive checks for the same thing.
>>
>>> @@ -667,6 +669,8 @@ static void ath9k_cache_beacon_config(struct ath_softc
>>> *sc,
>>> "Caching beacon data for BSS: %pM\n", bss_conf->bssid);
>>>
>>> cur_conf->beacon_interval = bss_conf->beacon_int;
>>> + if (WARN_ON_ONCE(cur_conf->beacon_interval == 0))
>>> + cur_conf->beacon_interval = 100;
>>> cur_conf->dtim_period = bss_conf->dtim_period;
>>> cur_conf->listen_interval = 1;
>>> cur_conf->dtim_count = 1;
>>> diff --git a/drivers/net/wireless/ath/ath9k/recv.c
>>> b/drivers/net/wireless/ath/ath9k/recv.c
>>> index b97217d..79c20c7 100644
>>> --- a/drivers/net/wireless/ath/ath9k/recv.c
>>> +++ b/drivers/net/wireless/ath/ath9k/recv.c
>>> @@ -538,7 +538,8 @@ static void ath_rx_ps_beacon(struct ath_softc *sc,
>>> struct sk_buff *skb)
>>> sc->ps_flags &= ~PS_BEACON_SYNC;
>>> ath_dbg(common, PS,
>>> "Reconfigure beacon timers based on synchronized
>>> timestamp\n");
>>> - ath9k_set_beacon(sc);
>>> + if (!(WARN_ON_ONCE(sc->cur_beacon_conf.beacon_interval == 0)))
>>> + ath9k_set_beacon(sc);
>>> }
>>>
>>> if (ath_beacon_dtim_pending_cab(skb)) {
>>>
>>
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>>
>
--
Ben Greear <gree...@candelatech.com>
Candela Technologies Inc http://www.candelatech.com
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