From mboxrd@z Thu Jan  1 00:00:00 1970
From: Felix Fietkau <nbd@openwrt.org>
Date: Thu, 09 May 2013 17:16:04 +0200
Subject: [ath9k-devel] minstrel_ht: problems with HT40
In-Reply-To: <518BBC3F.2030007@rempel-privat.de>
References: <518BA7A8.7030204@rempel-privat.de> <518BB57D.80204@openwrt.org>
	<518BBC3F.2030007@rempel-privat.de>
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To: ath9k-devel@lists.ath9k.org

On 2013-05-09 5:09 PM, Oleksij Rempel wrote:
> Am 09.05.2013 16:41, schrieb Felix Fietkau:
>> On 2013-05-09 3:42 PM, Oleksij Rempel wrote:
>>> Hallo Felix,
>>>
>>> i found your patches for moving ath9k to minstrel_ht and decided to do
>>> some testing.
>>> For some reason, minstrel_ht exclude all HT40 rates in my network. With
>>> native ath9k rate controller I'm able to use HT40.
>>> Do you have any idea where to start digging?
>> Do the rates not even show up in the debugfs rate control stats?
> 
> correct
> 
>> If so,
>> check the value of sta->bandwidth at the time minstrel_ht_update_caps()
>> is called.
> 
> hmm... for some reasons sta->bandwidth is always 0.
OK, maybe it's a mac80211 issue then. Maybe ath9k rate control checks
this field even between HT capability updates.
Check when/where this is updated in mac80211.

- Felix