Re: [PATCH v5 1/3] mac80211: improve the rate control API

[Felix Fietkau <nbd@openwrt.org>]

On 2013-04-22 3:52 PM, Johannes Berg wrote:
> On Mon, 2013-04-22 at 12:09 +0200, Felix Fietkau wrote:
> 
>> @@ -692,16 +692,38 @@ ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
>>  	 */
>>  	rate_control_get_rate(tx->sdata, tx->sta, &txrc);
>>  
>> -	if (unlikely(info->control.rates[0].idx < 0))
>> -		return TX_DROP;
>> +	if (tx->sta && !info->control.skip_table)
>> +		ratetbl = rcu_dereference(tx->sta->sta.rates);
>> +
>> +	if (unlikely(info->control.rates[0].idx < 0)) {
>> +		if (ratetbl) {
>> +			struct ieee80211_tx_rate rate = {
>> +				.idx = ratetbl->rate[0].idx,
>> +				.flags = ratetbl->rate[0].flags,
>> +				.count = ratetbl->rate[0].count
>> +			};
>> +
>> +			if (ratetbl->rate[0].idx < 0)
>> +				return TX_DROP;
> 
> This can't happen, idx is unsigned. Did you intend idx to be signed?
Right, shouldn't the compiler warn about this? Will send v6.

- Felix